[Elecraft] Elecraft Digest, Vol 139, Issue 5
Russ Woirhaye
k0vxu at kc.rr.com
Thu Nov 5 11:44:04 EST 2015
While I only have one QSO (1995, confirmed at that) with South Georgia and
two QSOs (2002, confirmed CW/SSB) with South Sandwich, I am not inclined to
commit KCDX Club money over and above what we have already sent. Most
certainly I would like to fill other band slots with QSOs with these two
'entities', but I don't expect other club members to subsidize that.
So, I think we are all in agreement. Save our Club's money for other worthy
DXpeditions in 2016/2017.
Russ
-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
elecraft-request at mailman.qth.net
Sent: Thursday, November 05, 2015 9:31 AM
To: elecraft at mailman.qth.net
Subject: Elecraft Digest, Vol 139, Issue 5
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Today's Topics:
1. K2 Question: Is the DSP Board a Worthwhile upgrade? (David Inger)
2. WTB: KPA500 (Atsu Taniguchi)
3. Re: MAB boards for the K2? (Byron Servies)
4. Re: MAB boards for the K2? (Reuben Popp)
5. Re: KAT500 and KAT500 Utility Question (Phil Hystad)
6. Re: KX3 auto tuner solution available after tune? (Wayne Burdick)
7. Re: KX3 auto tuner solution available after tune? [TYPO
FIXED] (Wayne Burdick)
8. Re: K2 Question: Is the DSP Board a Worthwhile upgrade?
(Phil Wheeler)
9. Re: K2 Question: Is the DSP Board a Worthwhile upgrade?
(Don Wilhelm)
10. Re: KAT500 and KAT500 Utility Question (Jim Brown)
11. Re: K2 Question: Is the DSP Board a Worthwhile upgrade?
(Matt Maguire)
12. Re: MAB boards for the K2? (Brian Denley)
13. Re: MAB boards for the K2? (Brian Denley)
14. Bias and Dynamic Mics (Jim Brown)
15. Re: MAB boards for the K2? (Chip Stratton)
16. Re: K2 Question: Is the DSP Board a Worthwhile upgrade?
(James Bennett)
17. Re: Bias and Dynamic Mics (Bob McGraw - K4TAX)
18. Re: Bias and Dynamic Mics (Jim Brown)
19. Microphone Setup (James F. Boehner, MD)
20. Re: K2 Question: Is the DSP Board a Worthwhile upgrade?
(Sverre Holm (LA3ZA))
21. Re: K2 Question: Is the DSP Board a Worthwhile upgrade?
(Phil Wheeler)
22. Re: Bias and Dynamic Mics (Jim Brown)
23. MCU 5.10 or later (Mike Weir)
24. Re: Bias and Dynamic Mics (Joe Subich, W4TV)
25. Re: K3 Voltage on TX (ok1rp)
26. Re: K3 Voltage on TX (Bob McGraw - K4TAX)
27. Soldering crimped connectors is not a good thing. (Michael Blake)
28. High SWR no power out (WR5DC)
29. Re: Soldering crimped connectors is not a good thing.
(Robert Harmon)
----------------------------------------------------------------------
Message: 1
Date: Wed, 4 Nov 2015 15:44:20 -0800
From: "David Inger" <ingerassociates at cox.net>
To: <Elecraft at mailman.qth.net>
Subject: [Elecraft] K2 Question: Is the DSP Board a Worthwhile
upgrade?
Message-ID: <E74EFB9C96E9430083E19DF0DD44F5D8 at DELLXPS>
Content-Type: text/plain; charset="us-ascii"
A friend has a fairly recent K2 with the KAF2 audio filter option. He asked
me to remove the KAF2, build the KDSP2 board and install it in his K2. This
got me to thinking: I also have a K2 wiht the KAF2 installed. My friend
works mainly SSB; I work main CW and digital modes. Is the DSP board a
significant improvement over the bare K2 or even with the KAF2 installed
(which seems to be tailored for CW reception)? In general, radios that I
have owned with AF DSP have been pretty much a disappointment. So is the
KDSP2 a worthwhile and cost-effective upgrade?
73 de K6SBA
David in Santa Barbara, CA
------------------------------
Message: 2
Date: Thu, 5 Nov 2015 08:44:51 +0900
From: "Atsu Taniguchi" <je1trv at a1club.net>
To: elecraft at mailman.qth.net
Subject: [Elecraft] WTB: KPA500
Message-ID: <d2c471a303db5575a030790209819591.squirrel at www.a1club.net>
Content-Type: text/plain;charset=iso-2022-jp
Anyone who can sell and ship used KPA500 to Tokyo with reasonable price
please contact off the list.
Tks in advance de JE1TRV, Atsu
------------------------------
Message: 3
Date: Wed, 4 Nov 2015 15:49:22 -0800
From: Byron Servies <byron at n6nul.org>
To: Doug Shields <w4das at comcast.net>
Cc: Reuben Popp <reuben.popp at gmail.com>, "elecraft at mailman.qth.net"
<elecraft at mailman.qth.net>
Subject: Re: [Elecraft] MAB boards for the K2?
Message-ID:
<CANB4+4Fr61Mm=0YV6eN5kyrXzTo9nn6gfH-o4pK686u1=vB3wQ at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Hi,
I have some spare, uncut and unpopulated, MAB boards. I'd have to work out
a price, but they are here if you want a couple.
73, Byron N6NUL
On Wednesday, November 4, 2015, Doug Shields <w4das at comcast.net> wrote:
> Rueben,
> I brokered the last bunch of MAB boards. All have been sold. If
> there
> is interest, we can make another run of boards. I think I have a few
parts
> left over but we can come up with full kits if anyone is interested in
> those. If you are interested in boards or kits let me know.
>
> Doug W4DAS
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net <javascript:;>]
> On Behalf Of Reuben
> Popp
> Sent: Wednesday, November 04, 2015 4:07 PM
> To: elecraft at mailman.qth.net <javascript:;>
> Subject: [Elecraft] MAB boards for the K2?
>
> Does anyone know if any of the MAB board are still floating out there or
> does anyone have a spare for sale?
>
> http://www.genebitsystems.com/david/K2MiscAccessoryBoard/index.htm
>
> Thanks in advance as always, and 73
> Reuben
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net <javascript:;>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to byron at n6nul.org <javascript:;>
>
--
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
------------------------------
Message: 4
Date: Wed, 04 Nov 2015 23:58:36 +0000
From: Reuben Popp <reuben.popp at gmail.com>
To: Byron Servies <byron at n6nul.org>, Doug Shields <w4das at comcast.net>
Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] MAB boards for the K2?
Message-ID:
<CAB-aZK9LfcvgLDjT8FM3XRLHLEZd6oj_rVZh9w29qjGytdyB+g at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Hi Byron
I would like at least one at the bare minimum however if you have a minimum
order requirement I'm sure we can work something out for that as well.
What are you asking per board?
Thanks and 73
Reuben
On Wed, Nov 4, 2015, 5:49 PM Byron Servies <byron at n6nul.org> wrote:
> Hi,
>
> I have some spare, uncut and unpopulated, MAB boards. I'd have to work out
> a price, but they are here if you want a couple.
>
> 73, Byron N6NUL
>
> On Wednesday, November 4, 2015, Doug Shields <w4das at comcast.net> wrote:
>
>> Rueben,
>> I brokered the last bunch of MAB boards. All have been sold. If
>> there
>> is interest, we can make another run of boards. I think I have a few
>> parts
>> left over but we can come up with full kits if anyone is interested in
>> those. If you are interested in boards or kits let me know.
>>
>> Doug W4DAS
>>
>> -----Original Message-----
>> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
>> Reuben
>> Popp
>> Sent: Wednesday, November 04, 2015 4:07 PM
>> To: elecraft at mailman.qth.net
>> Subject: [Elecraft] MAB boards for the K2?
>>
>> Does anyone know if any of the MAB board are still floating out there or
>> does anyone have a spare for sale?
>>
>> http://www.genebitsystems.com/david/K2MiscAccessoryBoard/index.htm
>>
>> Thanks in advance as always, and 73
>> Reuben
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> Message delivered to byron at n6nul.org
>>
>
>
> --
> - Northern California Contest Club
> - CU in the Cal QSO Party 1-2 Oct 2016
> - www.cqp.org
>
------------------------------
Message: 5
Date: Wed, 04 Nov 2015 16:10:11 -0800
From: Phil Hystad <phystad at mac.com>
To: "Wes (N7WS)" <wes at triconet.org>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KAT500 and KAT500 Utility Question
Message-ID: <61487633-EC04-4CB7-A5F2-6D471FB13B7E at mac.com>
Content-Type: text/plain; charset=utf-8
Wes?
Thanks, you are exactly right. My curiosity is about what the KAT500 was
doing and the value of the BYPASS SWR versus the values I saw of the Tuned
(or, not tuned) SWR.
Dick?s answer was right on and satisfied all my curiosity needs.
Though thanks to all that took the time to write something down and Wes, I
will read your paper at your link. In fact, just downloaded it.
73, phil, K7PEH
> On Nov 4, 2015, at 3:04 PM, Wes (N7WS) <wes at triconet.org> wrote:
>
> Guys, read what he wrote, not what you think he wrote.
>
> He had a question about the operation of the metering in the KAT500, he
wasn't looking for advice on antenna design or on the use of ladder line.
>
> If he wants that he can read my paper here:
http://k6mhe.com/n7ws/Ladder_Line.pdf
>
>
> 11/4/2015 3:37 PM, Fred Jensen wrote:
>> On 11/4/2015 12:59 PM, Phil Hystad wrote:
>>
>>> I use the KAT500 with my 80-meter dipole fed by ladder line and a 4:1
>>> Balun to Coax for last 20 feet. This antenna works excellently in
>>> concert with the KAT500 for 80, 40, and 30 meter bands. I don?t use
>>> it with other bands.
>>
>> Feed point Z's:
>> 1.9: 5.6-j1149
>> 3.9: 78+j2
>> 7.2: 2703+j2201
>>
>> Your ladder line will transform these impedances to something else ...
unless it happens to be a multiple of a half-wave at one of those
frequencies. Tell me how long it is and we can calculate what it looks like
on the high side of your 4:1 transformer. I don't recommend holding your
breath that it will be good on all three bands though.
>>>
>>> This weekend, I was curious as to how close (or far) the KAT500 could
>>> bring the antenna in for the 160 meter band. I knew that it would
>>> not work though I was wondering how bad it would be.
>>
>> The radiation resistance on 160 will be very low and the 4:1 transformer
will divide it by 4, meaning just a tad above 1 ohm. It is also very
reactive.
>>
>> If you really want to use it on 160, try shorting the ladder line at the
feed end, remove the transformer, and connect the shorted end to the coax
through a variable cap. Run 1 or 2 wires on the ground from the coax shield
and see if you can feed it as a Marconi-T.
>>
>> If your ladder line is 60 ft long, feed Z at the shorted end of the
ladder line will be about 110+j1400 and an Xc of 1400 ohms will probably
work fine for the KAT500.
>>>
>>> So, as I expected, the tuning never closed in on a descent SWR, the
>>> best I saw on one test only was SWR about 49:1 as reported by the
>>> KAT500 utility. But, the BYPASS SWR reported was about 11:1.
>>
>> SWR meters, which usually measure VSWR are fairly unreliable at high
values of mismatch.
>>
>> 73,
>>
>> Fred K6DGW
>> - Northern California Contest Club
>> - CU in the Cal QSO Party 1-2 Oct 2016
>> - www.cqp.org
>>
>> Message delivered to wes at triconet.org
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to phystad at mac.com
------------------------------
Message: 6
Date: Wed, 4 Nov 2015 16:34:37 -0800
From: Wayne Burdick <n6kr at elecraft.com>
To: Michael Blake <k9jri at outlook.com>
Cc: Elecraft Reflector <Elecraft at mailman.qth.net>
Subject: Re: [Elecraft] KX3 auto tuner solution available after tune?
Message-ID: <955A4825-056C-4B13-A984-B234615A2757 at elecraft.com>
Content-Type: text/plain; charset=windows-1252
Michael Blake <k9jri at outlook.com> wrote:
> Does the KX3?s internal auto tuner have the ability to provide the tuned
solution like the Elecraft T1 QRP tuner does?
Hi Michael,
You can use the "AK;" command to get the KXAT3's relay states.
The response format is
AKaabbcc;
where:
aa = inductance IO bitmap in ASCII hex
bb = capacitance bitmap in ASCII hex
cc = misc relays bitmap in ASCII hex
The <aa> and <bb> bitmaps can be equated to L and C values by looking at the
KXAT3 schematic. For example, a value of "01" would represent the smallest L
or C value in the network.
At present only bit 0 of byte cc is defined:
00 = capacitors on antenna side
01 = capacitors on antenna side
If the ATU is not installed, or is in one of the Lx/Cx test settings,
?AK000000;? is returned.
In BYP mode, on some bands L and C are set to fixed non-zero values in order
to cancel the ATU's own reactance when working into a 50-ohm load.
In AUTO mode, the working auto-tuned values are shown.
73,
Wayne
N6KR
------------------------------
Message: 7
Date: Wed, 4 Nov 2015 16:42:06 -0800
From: Wayne Burdick <n6kr at elecraft.com>
To: Michael Blake <k9jri at outlook.com>
Cc: Elecraft Reflector <Elecraft at mailman.qth.net>
Subject: Re: [Elecraft] KX3 auto tuner solution available after tune?
[TYPO FIXED]
Message-ID: <5EF806EC-2478-45BE-ADE9-EB9B7AAF31CE at elecraft.com>
Content-Type: text/plain; charset=windows-1252
There was a typo in the byte <cc> information -- now fixed.
Wayne
* * *
Michael Blake <k9jri at outlook.com> wrote:
> Does the KX3?s internal auto tuner have the ability to provide the tuned
solution like the Elecraft T1 QRP tuner does?
Hi Michael,
You can use the "AK;" command to get the KXAT3's relay states.
The response format is
AKaabbcc;
where:
aa = inductance IO bitmap in ASCII hex
bb = capacitance bitmap in ASCII hex
cc = misc relays bitmap in ASCII hex
The <aa> and <bb> bitmaps can be equated to L and C values by looking at the
KXAT3 schematic. For example, a value of "01" would represent the smallest L
or C value in the network.
At present only bit 0 of byte <cc> is defined:
00 = capacitors on the antenna side
01 = capacitors on the transmit side
If the ATU is not installed, or is in one of the Lx/Cx test settings,
?AK000000;? is returned.
In BYP mode, on some bands L and C are set to fixed non-zero values in order
to cancel the ATU's own reactance when working into a 50-ohm load.
In AUTO mode, the working auto-tuned values are shown.
73,
Wayne
N6KR
------------------------------
Message: 8
Date: Wed, 4 Nov 2015 17:06:34 -0800
From: Phil Wheeler <w7ox at socal.rr.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Question: Is the DSP Board a Worthwhile
upgrade?
Message-ID: <563AAB9A.5070608 at socal.rr.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
I thought it was. A bit complicated to get
adjusted just right, but there is/was a how-to doc
at the Elecraft website which you might want to
read, David.
I say "thought" because now I use my K3 and KX3,
though I still have my all-up K2; it's a keeper at
this point.
73, Phil W7OX (in Torrance).
On 11/4/15 3:44 PM, David Inger wrote:
> A friend has a fairly recent K2 with the KAF2 audio filter option. He
asked
> me to remove the KAF2, build the KDSP2 board and install it in his K2.
This
> got me to thinking: I also have a K2 wiht the KAF2 installed. My friend
> works mainly SSB; I work main CW and digital modes. Is the DSP board a
> significant improvement over the bare K2 or even with the KAF2 installed
> (which seems to be tailored for CW reception)? In general, radios that I
> have owned with AF DSP have been pretty much a disappointment. So is the
> KDSP2 a worthwhile and cost-effective upgrade?
>
> 73 de K6SBA
> David in Santa Barbara, CA
------------------------------
Message: 9
Date: Wed, 4 Nov 2015 20:32:44 -0500
From: Don Wilhelm <w3fpr at embarqmail.com>
To: David Inger <ingerassociates at cox.net>, Elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Question: Is the DSP Board a Worthwhile
upgrade?
Message-ID: <563AB1BC.9040802 at embarqmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
David,
The KAF2 is mainly for CW use. It provides a great peaking filter at
the frequency that you have set it to (presumably your sidetone pitch).
It also has a low pass filter that is in-circuit at all times. That can
reduce band noise hiss for all modes.
The KDSP2 also provides filtering for CW, SSB and data modes. If you
are bothered by signals nearby in frequency, the straight-sided filters
of the KDSP2 will be an advantage.
The KDSP2 also provides noise reduction algorithms, although turning on
NR in any transceiver can introduce distortion for voice signals. How
bad that is will be determined by the aggressiveness of the algorithms.
The KDSP2 does allow a wide range of settings, and you may have to
experiment with those setting if the defaults do not satisfactorily
handle your particular noise situation.
So, not directly answering your question, the KDSP2 can provide
filtering as good as the KAF2 (even better), but if the operator is CW
oriented, the additional cost of the KDSP2 option may not provide the
improvement expected - for SSB operation, there is no choice, the KAF2
is not useful on SSB (other than the Low Pass Filter) and the KDSP2 is
the only real choice between the two.
73,
Don W3FPR
On 11/4/2015 6:44 PM, David Inger wrote:
> A friend has a fairly recent K2 with the KAF2 audio filter option. He
asked
> me to remove the KAF2, build the KDSP2 board and install it in his K2.
This
> got me to thinking: I also have a K2 wiht the KAF2 installed. My friend
> works mainly SSB; I work main CW and digital modes. Is the DSP board a
> significant improvement over the bare K2 or even with the KAF2 installed
> (which seems to be tailored for CW reception)? In general, radios that I
> have owned with AF DSP have been pretty much a disappointment. So is the
> KDSP2 a worthwhile and cost-effective upgrade?
>
>
------------------------------
Message: 10
Date: Wed, 4 Nov 2015 17:40:11 -0800
From: Jim Brown <jim at audiosystemsgroup.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KAT500 and KAT500 Utility Question
Message-ID: <563AB37B.9080107 at audiosystemsgroup.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On Wed,11/4/2015 3:04 PM, Wes (N7WS) wrote:
> If he wants that he can read my paper here:
> http://k6mhe.com/n7ws/Ladder_Line.pdf
By all means DO read and STUDY it -- it's a GREAT piece of work.
73, Jim K9YC
------------------------------
Message: 11
Date: Thu, 5 Nov 2015 12:45:39 +1100
From: Matt Maguire <matt.vk2rq at gmail.com>
To: elecraft at mailman.qth.net, David Inger <ingerassociates at cox.net>
Subject: Re: [Elecraft] K2 Question: Is the DSP Board a Worthwhile
upgrade?
Message-ID: <etPan.563ab4c3.32f8cbae.19fe at mbp13.lan>
Content-Type: text/plain; charset="utf-8"
When I built my K2 a year and a half ago, I also had to decide between bare
K2 vs KAF2 vs KDSP2, and went through the archives. In the end I went with
the KDSP2, but some of the points I considered along the way:
Bare K2:
- built-in IF filters do work very well, but I read some reports that strong
stations nearby can produce some ??blow-by??, and that either the KAF2 or
KDSP2 can help clean it up.
- At some point, Elecraft may cease production of the K2, and if I leave my
K2 bare, I may not get the chance to upgrade it later.
KAF2:
- cheap, very easy to use
- for CW, reports seem to indicate it performs about the same as the KDSP2
- has a nice LPF stage that cuts down background hiss, seems to be better
than the KDSP2 in this regard. Some people have added a KAF2-style LPF to
their KDSP2 with good results.
KDSP2:
- much more configurable than KAF2
- has noise reduction feature, I thought this might come in handy if I have
the K2 as a second radio, and have it sitting on my club?s SSB calling
frequency. It does keep the radio very quiet, almost like a voice squelch.
- also has automatic notch filter, in case I need it
- can go very narrow. I had good experiences with the DSP filtering in my
KX3, which was really effective in digging out some very weak sigs on our
QRP net (although so far I have mainly used the K2 for rag chewing, haven?t
really done any side-by-side comparisons with KX3)
- Code for the DSP is open source, so might be fun to play with. However, I
think the development kits are now out of production, and I think maybe the
chip in my KDSP2 was not in a socket, but soldered directly to the board
(someone correct me if I am wrong). So, there are some barriers to playing
with the DSP code, and if I wanted to experiment in DSP techniques, a much
easier way would probably be to use a generic PC with sound card and
GNUradio or similar development environment.
- KDSP2 chews a lot more power than KAF2, which may be an issue if you like
to run off batteries. You can disable the KDSP2 through the menu, which
significantly reduces but doesn?t eliminate the additional power draw. If
you power-cycle the K2, the disable setting of the KDSP2 is forgotten, and
the KDSP2 will become active again.
- the KDSP2 is a lot more complicated to use than KAF2. This means you have
more flexibility, and some people like having lots of settings to play with,
so it can be a plus. But it can also be a minus as it can be hard to
remember how to change some of the less commonly adjusted settings. Having
said that, the defaults on the KDSP2 are usually fine.?
So, is the KDSP2 a worthwhile upgrade? For your SSB friend, I would say yes.
For a primarily CW operator like yourself who already has a KAF2, it might
be harder to justify. Is the upgrade cost-effective? Well, the KDSP2 is
significantly more expensive than the KAF2, and it is a personal choice
whether the extra value/fun brought by the KDSP2?s additional features
warrants the additional cost. After all, it is a hobby :-)
--?
73 de Matt VK2RQ
On 5 novembre 2015 at 10:44:52 AM, David Inger (ingerassociates at cox.net)
wrote:
A friend has a fairly recent K2 with the KAF2 audio filter option. He asked
me to remove the KAF2, build the KDSP2 board and install it in his K2. This
got me to thinking: I also have a K2 wiht the KAF2 installed. My friend
works mainly SSB; I work main CW and digital modes. Is the DSP board a
significant improvement over the bare K2 or even with the KAF2 installed
(which seems to be tailored for CW reception)? In general, radios that I
have owned with AF DSP have been pretty much a disappointment. So is the
KDSP2 a worthwhile and cost-effective upgrade?
73 de K6SBA
David in Santa Barbara, CA
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to matt.vk2rq at gmail.com
------------------------------
Message: 12
Date: Wed, 4 Nov 2015 20:53:36 -0500
From: Brian Denley <b.denley at comcast.net>
To: Reuben Popp <reuben.popp at gmail.com>
Cc: Byron Servies <byron at n6nul.org>, Doug Shields <w4das at comcast.net>,
"elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] MAB boards for the K2?
Message-ID: <89EBCD1F-DDEC-4B79-BD2A-6C7CBE8CF9F5 at comcast.net>
Content-Type: text/plain; charset=us-ascii
I would like one as well if you have enough.
Brian KB1VBF
Brian Denley
KB1VBF
Sent from my iPad
> On Nov 4, 2015, at 6:58 PM, Reuben Popp <reuben.popp at gmail.com> wrote:
>
> Hi Byron
>
> I would like at least one at the bare minimum however if you have a
minimum
> order requirement I'm sure we can work something out for that as well.
>
> What are you asking per board?
>
> Thanks and 73
> Reuben
>
>> On Wed, Nov 4, 2015, 5:49 PM Byron Servies <byron at n6nul.org> wrote:
>>
>> Hi,
>>
>> I have some spare, uncut and unpopulated, MAB boards. I'd have to work
out
>> a price, but they are here if you want a couple.
>>
>> 73, Byron N6NUL
>>
>>> On Wednesday, November 4, 2015, Doug Shields <w4das at comcast.net> wrote:
>>>
>>> Rueben,
>>> I brokered the last bunch of MAB boards. All have been sold. If
>>> there
>>> is interest, we can make another run of boards. I think I have a few
>>> parts
>>> left over but we can come up with full kits if anyone is interested in
>>> those. If you are interested in boards or kits let me know.
>>>
>>> Doug W4DAS
>>>
>>> -----Original Message-----
>>> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
>>> Reuben
>>> Popp
>>> Sent: Wednesday, November 04, 2015 4:07 PM
>>> To: elecraft at mailman.qth.net
>>> Subject: [Elecraft] MAB boards for the K2?
>>>
>>> Does anyone know if any of the MAB board are still floating out there or
>>> does anyone have a spare for sale?
>>>
>>> http://www.genebitsystems.com/david/K2MiscAccessoryBoard/index.htm
>>>
>>> Thanks in advance as always, and 73
>>> Reuben
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to byron at n6nul.org
>>
>>
>> --
>> - Northern California Contest Club
>> - CU in the Cal QSO Party 1-2 Oct 2016
>> - www.cqp.org
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to b.denley at comcast.net
------------------------------
Message: 13
Date: Wed, 4 Nov 2015 20:54:29 -0500
From: Brian Denley <b.denley at comcast.net>
To: Doug Shields <w4das at comcast.net>
Cc: Reuben Popp <reuben.popp at gmail.com>, elecraft at mailman.qth.net
Subject: Re: [Elecraft] MAB boards for the K2?
Message-ID: <76AEF3FE-6465-4A3B-B636-B9323EF30A47 at comcast.net>
Content-Type: text/plain; charset=us-ascii
I'm interested.
Brian Denley
KB1VBF
Sent from my iPad
> On Nov 4, 2015, at 5:55 PM, Doug Shields <w4das at comcast.net> wrote:
>
> Rueben,
> I brokered the last bunch of MAB boards. All have been sold. If
there
> is interest, we can make another run of boards. I think I have a few
parts
> left over but we can come up with full kits if anyone is interested in
> those. If you are interested in boards or kits let me know.
>
> Doug W4DAS
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
Reuben
> Popp
> Sent: Wednesday, November 04, 2015 4:07 PM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] MAB boards for the K2?
>
> Does anyone know if any of the MAB board are still floating out there or
> does anyone have a spare for sale?
>
> http://www.genebitsystems.com/david/K2MiscAccessoryBoard/index.htm
>
> Thanks in advance as always, and 73
> Reuben
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to b.denley at comcast.net
------------------------------
Message: 14
Date: Wed, 4 Nov 2015 17:54:56 -0800
From: Jim Brown <jim at audiosystemsgroup.com>
To: elecraft at mailman.qth.net
Subject: [Elecraft] Bias and Dynamic Mics
Message-ID: <563AB6F0.4050600 at audiosystemsgroup.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
On Wed,11/4/2015 5:43 AM, Charlie T, K3ICH wrote:
> If you ever wondered why a bias voltage can cause
> distortion in a dynamic microphone element, just
> consider what happens when you connect a DC source
> to a speaker. The voice coil move in one
> direction depending on the polarity. Now think of
> a dynamic mic element doing the same thing.
This is one of those ideas that, while having a solid theoretical basis,
doesn't hold up once you plug numbers into the problem. That's because
the bias voltage is typically provided from a rather high impedance
source, so the bias current is too low and the sound pressure level is
too low to drive the diaphragm anywhere near its limits.
The simple fact is that it's virtually impossible to overload a dynamic
mic. One major mic manufacturer advertised that their dynamic mics could
reproduce a gunshot without distortion. It wasn't a lie -- almost any
pro dynamic mic can do that. When you hear distortion from a dynamic
mic, it's the mic producing enough output to overload the mic preamp,
and the solution is to either reduce the preamp gain or add a pad
(passive attenuator). Controls to do both are built into the mixers used
for live sound, broadcast, and recording.
73, Jim K9YC
------------------------------
Message: 15
Date: Wed, 4 Nov 2015 21:25:24 -0500
From: Chip Stratton <lightdazzled at gmail.com>
Cc: Elecraft Reflector <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] MAB boards for the K2?
Message-ID:
<CAPF-ba3iQtEyWgLwc4SVJh5+XdN6tAtVMvFFQU+j9trw_e=o4g at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
One of the connectors used for the MAB is no longer available. I can't
remember exactly which one it is, but you better figure that one out before
spending time and money on another MAB run.
Chip
AE5KA
------------------------------
Message: 16
Date: Wed, 04 Nov 2015 18:27:17 -0800
From: James Bennett <w6jhb at me.com>
To: David Inger <ingerassociates at cox.net>
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Question: Is the DSP Board a Worthwhile
upgrade?
Message-ID: <7C8F5D56-A1C1-4149-BFFB-4FFB933CE439 at me.com>
Content-Type: text/plain; charset=us-ascii
David,
My K2 is long gone, but I can tell you about my experience with the DSP
module. I operate mainly CW, and added the DSP option after having the K2
for over a year. For me, it was a mistake. The radio didn't sound as good as
it did before adding it. I wound up taking it out and selling the board.
Maybe it was me, maybe I didn't have something set right, but whatever it
was, if I owned a K2 today there is no way I'd put that option in it. Just
my two centavos...
Jim / W6JHB
> On Nov 4, 2015, at 15:44, David Inger <ingerassociates at cox.net> wrote:
>
> A friend has a fairly recent K2 with the KAF2 audio filter option. He
asked
> me to remove the KAF2, build the KDSP2 board and install it in his K2.
This
> got me to thinking: I also have a K2 wiht the KAF2 installed. My friend
> works mainly SSB; I work main CW and digital modes. Is the DSP board a
> significant improvement over the bare K2 or even with the KAF2 installed
> (which seems to be tailored for CW reception)? In general, radios that I
> have owned with AF DSP have been pretty much a disappointment. So is the
> KDSP2 a worthwhile and cost-effective upgrade?
>
> 73 de K6SBA
> David in Santa Barbara, CA
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w6jhb at me.com
------------------------------
Message: 17
Date: Wed, 4 Nov 2015 20:39:49 -0600
From: Bob McGraw - K4TAX <rmcgraw at blomand.net>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Bias and Dynamic Mics
Message-ID: <563AC175.7050008 at blomand.net>
Content-Type: text/plain; charset=windows-1252; format=flowed
While I agree with Jim, K9YC on this. Some dynamic mikes I've
encountered do use a transformer to get the voltage level from the very
low impedance Z element to a respectable output value. Running a bit of
DC through the transformer on the secondary side could tend to cause
some DC saturation. And transformers which are not designed to handle
DC can behave a bit odd under this condition. Other dynamic mikes I've
encountered provide an internal DC blocking capacitor to prevent this
issue, although that in itself has its issues.
Yes, with any dynamic mike being used, set the bias to the off
position.......just to be safe. And don't worry about overloading a
dynamic mike, but do be concerned with the preamp or first analog stage
being driven into distortion.
73
Bob, K4TAX
On 11/4/2015 7:54 PM, Jim Brown wrote:
> This is one of those ideas that, while having a solid theoretical
> basis, doesn't hold up once you plug numbers into the problem. That's
> because the bias voltage is typically provided from a rather high
> impedance source, so the bias current is too low and the sound
> pressure level is too low to drive the diaphragm anywhere near its
> limits.
------------------------------
Message: 18
Date: Wed, 4 Nov 2015 18:49:58 -0800
From: Jim Brown <jim at audiosystemsgroup.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Bias and Dynamic Mics
Message-ID: <563AC3D6.6040306 at audiosystemsgroup.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
On Wed,11/4/2015 6:39 PM, Bob McGraw - K4TAX wrote:
> While I agree with Jim, K9YC on this. Some dynamic mikes I've
> encountered do use a transformer to get the voltage level from the
> very low impedance Z element to a respectable output value. Running a
> bit of DC through the transformer on the secondary side could tend to
> cause some DC saturation.
Exactly right, Bob. And Don Wilhelm reminded me that some mics used with
a K2 didn't like bias. That can, of course, depend strongly on the value
of the bias source resistance.
73, Jim K9YC
------------------------------
Message: 19
Date: Wed, 4 Nov 2015 22:14:54 -0500
From: "James F. Boehner, MD" <jboehner01 at yahoo.com>
To: <w3fpr at embarqmail.com>, <elecraft at mailman.qth.net>
Subject: [Elecraft] Microphone Setup
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
Don,
Thanks to you, Richard, Gene, Charlie, Bob and Mitch for your constructive
and educational responses on this topic.
Don, I am happy to say that the settings you mention below were the ones
that I settled on after some experimentation prior to my post. I appreciate
the validation and the background on the reasons why those settings are the
desired ones.
Not all information is in the manual, certainly not specifics. The
collective experience on this list is greatly appreciated, especially from
those of us that are new to the Elecraft line.
Thanks again!
'73 de Jim N2ZZ
-----Original Message-----
From: Don Wilhelm [mailto:w3fpr at embarqmail.com]
Sent: Wednesday, November 04, 2015 8:06 AM
To: James F. Boehner, MD; elecraft at mailman.qth.net
Subject: Re: [Elecraft] Microphone Setup
Dr. Jim,
There is no FAQ that I am aware of.
Actually the information is pretty basic. Microphone elements come in two
basic types - Electret and Dynamic.
The Electret types need a DC bias applied to the AF line.
The Dynamic elements should *not* have bias applied or they will be
distorted.
The other thing that often causes confusion is the mic plug pinout. The mic
plug wiring must match the pin arrangement used in the transceiver, and that
information is shown in the transceiver manual. In the case of the Elecraft
K3 and K3S, the 8 pin mic pinout differs only from that used by Kenwood in
that the use of pins 5 and 6 are reversed. Since most Kenwood unamplified
dynamic microphones do not use pins 5 and 6, most all Kenwood dynamic
microphones will work directly with the K3 and K3S.
Heil microphones normally use a 4 pin XLR as a generalized connector
*and* use an adapter or special cable to change that XLR connection to that
required for the transceiver. The adapter to be used with the K3 and K3S is
the one for the Kenwood (which has a red band).
Heil microphones come in both the dynamic and the electret types, although
most are dynamic. If the microphone is designated with a "-iC"
or "-K2" it is an electret type.
A lot of information on microphones and transceiver connections can be found
at http://homepage.ntlworld.com/rg4wpw/date.html. G4WPW has done an
excellent job of collecting information about microphones, mic pinouts and
even schematics.
In your particular case with the Heil PR-781, use the Kenwood cable (Heil
CC-1XLR-K) with that microphone and make certain the bias is turned off.
I believe that microphone has a rather low output, so you may have to use
the high range for the mic gain.
So - the K3(S) MIC SEL menu should be set to "FP H".
Set the mic gain as described in the K3 manual - first set compression to
zero, then adjust the MIC GAIN until you see 5 to 7 bars illuminated on the
ALC meter (that can be done in TX TEST so no RF is produced).
Then bring the compression up to your tastes, usually in the 3 to 6 dB
range.
73,
Don W3FPR
On 11/3/2015 10:44 PM, James F. Boehner, MD via Elecraft wrote:
> Is there an FAQ for microphone setups for the K3(S)?
>
> Particularly, I am looking how to set up the Heil PR-781 on the K3,
> including the menu setup.
>
>
------------------------------
Message: 20
Date: Wed, 4 Nov 2015 20:35:25 -0700 (MST)
From: "Sverre Holm (LA3ZA)" <LA3ZA at nrrl.no>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Question: Is the DSP Board a Worthwhile
upgrade?
Message-ID: <1446694525425-7609972.post at n2.nabble.com>
Content-Type: text/plain; charset=us-ascii
I would not have upgraded to the KDSP2. Not for the performance, because
although I'm mainly a CW operator, I could probably benefit from it.
My main objection to the KDSP2 is user interface. The K2 was not designed
for the KDSP2 in the first place as can be seen in how complicated it is to
set up and operate compared to the other K2 modules. Given the few buttons
of the K2, the user interface for the KDSP2 is probably as good as it can
be, but still it is so much harder to use than the other options. The
otherwise well thought-out user interface of the K2 is made unncessary
complicated by the KDSP2 with all its features.
This can be read indirectly from the history of Elecraft here:
http://udel.edu/~mm/ham/elecraft/history/
Quote:
"A major milestone in our history was the KDSP2 option for the K2. Lyle
Johnson, KK7P, became known to us *after* he had mostly completed this
highly versatile DSP unit. He reverse-engineered the auxBus protocol and
made the KDSP2 behave as if it were a KAF2, which plugged into the same
spot. He showed it to us, and we immediately adopted both the product and
Lyle himself."
-----
Sverre, LA3ZA
K2 #2198, K3 #3391,
LA3ZA Blog: http://la3za.blogspot.com,
LA3ZA Unofficial Guide to K2 modifications:
http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K2-Question-Is-the-DSP-Board-a-Worthwhi
le-upgrade-tp7609953p7609972.html
Sent from the Elecraft mailing list archive at Nabble.com.
------------------------------
Message: 21
Date: Wed, 4 Nov 2015 20:34:15 -0800
From: Phil Wheeler <w7ox at socal.rr.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Question: Is the DSP Board a Worthwhile
upgrade?
Message-ID: <563ADC47.4020101 at socal.rr.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Definitely true re user interface. But if you get
it set up in a way that works well for you, then
not much need to tweak.
I don't often change settings in my K3 DSP either.
73, Phil W7OX
On 11/4/15 7:35 PM, Sverre Holm (LA3ZA) wrote:
> I would not have upgraded to the KDSP2. Not for the performance, because
> although I'm mainly a CW operator, I could probably benefit from it.
>
> My main objection to the KDSP2 is user interface. The K2 was not designed
> for the KDSP2 in the first place as can be seen in how complicated it is
to
> set up and operate compared to the other K2 modules. Given the few buttons
> of the K2, the user interface for the KDSP2 is probably as good as it can
> be, but still it is so much harder to use than the other options. The
> otherwise well thought-out user interface of the K2 is made unncessary
> complicated by the KDSP2 with all its features.
>
> This can be read indirectly from the history of Elecraft here:
> http://udel.edu/~mm/ham/elecraft/history/
>
> Quote:
> "A major milestone in our history was the KDSP2 option for the K2. Lyle
> Johnson, KK7P, became known to us *after* he had mostly completed this
> highly versatile DSP unit. He reverse-engineered the auxBus protocol and
> made the KDSP2 behave as if it were a KAF2, which plugged into the same
> spot. He showed it to us, and we immediately adopted both the product and
> Lyle himself."
>
>
>
>
>
> -----
> Sverre, LA3ZA
>
> K2 #2198, K3 #3391,
> LA3ZA Blog: http://la3za.blogspot.com,
> LA3ZA Unofficial Guide to K2 modifications:
http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html
------------------------------
Message: 22
Date: Wed, 4 Nov 2015 22:11:34 -0800
From: Jim Brown <jim at audiosystemsgroup.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Bias and Dynamic Mics
Message-ID: <563AF316.1000402 at audiosystemsgroup.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
On Wed,11/4/2015 6:39 PM, Bob McGraw - K4TAX wrote:
> Yes, with any dynamic mike being used, set the bias to the off position
Don Wilhelm says that some dynamic mics sold to hams DO get distorted
with bias applied. Whether it's a poor mic or a saturated transformer,
it's clearly better to turn off bias when using a ham dynamic mic.
73, Jim K9YC
------------------------------
Message: 23
Date: Thu, 5 Nov 2015 07:56:17 -0500
From: Mike Weir <ve3wdm at hotmail.com>
To: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Subject: [Elecraft] MCU 5.10 or later
Message-ID: <COL131-W8CE1AD89D32173D6B76EA91290 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
On Elecraft firmware download page users are instructed if you download MCU
5.10 or higher the 50 watt cal has do be done again. Does this also apply to
the low power K3, do I have to re-do the 5 watt cal?
Mike
VE3WDM
------------------------------
Message: 24
Date: Thu, 5 Nov 2015 08:35:25 -0500
From: "Joe Subich, W4TV" <lists at subich.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Bias and Dynamic Mics
Message-ID: <563B5B1D.2010303 at subich.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Even if the bias does not saturate the coil and cause distortion, it
*will* reduce the output (sensitivity). A dynamic mic typically has
a very low (< 5 mV) output level any reduction in output level is to be
avoided.
73,
... Joe, W4TV
On 11/5/2015 1:11 AM, Jim Brown wrote:
> On Wed,11/4/2015 6:39 PM, Bob McGraw - K4TAX wrote:
>> Yes, with any dynamic mike being used, set the bias to the off position
>
> Don Wilhelm says that some dynamic mics sold to hams DO get distorted
> with bias applied. Whether it's a poor mic or a saturated transformer,
> it's clearly better to turn off bias when using a ham dynamic mic.
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to lists at subich.com
>
------------------------------
Message: 25
Date: Thu, 5 Nov 2015 06:36:43 -0700 (MST)
From: ok1rp <indians at xsmail.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 Voltage on TX
Message-ID: <1446730603154-7609976.post at n2.nabble.com>
Content-Type: text/plain; charset=us-ascii
Hi Jeff,
many thanks for your post regarding the soldering Anderson Plug leads
connections.
It seems that I should check it too as I have 0.7V drop RX/TX on VFO-B line
measurement.
(even although I never had any problem regarding the low voltage...)
It is good hint for my old timer K3 (#778) although it work like champ now.
73 - Petr, OK1RP
-----
http://ok1rp.blogspot.com
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-Voltage-on-TX-tp7609564p7609976.html
Sent from the Elecraft mailing list archive at Nabble.com.
------------------------------
Message: 26
Date: Thu, 5 Nov 2015 08:39:05 -0600
From: Bob McGraw - K4TAX <rmcgraw at blomand.net>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 Voltage on TX
Message-ID: <563B6A09.3010601 at blomand.net>
Content-Type: text/plain; charset=windows-1252; format=flowed
In general, it would be ideal if there were zero voltage drop. This just
won't be the case in the real world. The VFO-B voltage indication is
reliable in terms of the voltage in receive vs. the voltage in
transmit. I think it reasonable to accept < 0.5 volt drop or less
between RX and TX at 100 watts output. Do consider the regulation of
the supply. Measure that with a good DVM at the supply terminals. And
here, it is reasonable to expect less than 0.1 volt change between RX
and TX at 100 watts. Many of the better supplies will be in the < 0.01
volt range under this condition.
If one finds more voltage drop than expected, then further investigation
is suggested. Are the terminals properly crimped and soldered on both
ends? Are the terminals tight fitting? Is the wire gauge correct for
the current demand and length? Are there other devices between the
supply and radio that will contribute to voltage drop? These are a few
questions to be answered.
Better regulation and maintaining a voltage at the radio between 13.5
and 14.5 will make for a cleaner transmitter in respect to transmitted
IMD. And that topic was "beat to death" in a previous discussion. If
the supply is not well regulated, be sure the voltage at the radio will
never exceed 15.0 volts.
73
Bob, K4TAX
On 11/5/2015 7:36 AM, ok1rp wrote:
> Hi Jeff,
>
> many thanks for your post regarding the soldering Anderson Plug leads
> connections.
> It seems that I should check it too as I have 0.7V drop RX/TX on VFO-B
line
> measurement.
> (even although I never had any problem regarding the low voltage...)
>
> It is good hint for my old timer K3 (#778) although it work like champ
now.
------------------------------
Message: 27
Date: Thu, 5 Nov 2015 10:18:36 -0500
From: Michael Blake <k9jri at outlook.com>
To: Elecraft Reflector <Elecraft at mailman.qth.net>
Subject: [Elecraft] Soldering crimped connectors is not a good thing.
Message-ID: <BLU436-SMTP175FB14B6696828EAF0DE4EFF290 at phx.gbl>
Content-Type: text/plain; charset="us-ascii"
While many people recommend soldering crimped connectors, such as Anderson
Power Poles, it is not a very good idea. The reason(s) it is neither
required, nor desired, is partially as follows:
1. A PROPERLY crimped connection creates a molecular bond between the
conductor and the connector that is more conductive than soldering.
2. The soldering process causes corrosion because even rosin core solder is
slightly acidic.
3. The solder that flows into or onto the conductor (wire) causes it to
stiffen and increases the probability that vibration or movement will cause
the wire to break at that point.
4. The annealing of the copper wire is altered which also increases the
possibility of wire breakage due to vibration or movement.
It is absolutely necessary that the proper tool be used for the connection
being crimped. If you are going to use a crimped connection it is
imperative that you have a tool that matches the connector. If you do not
have the proper tool then DO NOT use crimped connections.
Michael Blake
k9jri at outlook.com
------------------------------
Message: 28
Date: Thu, 5 Nov 2015 09:23:30 -0600
From: "WR5DC" <wr5dc at comcast.net>
To: <elecraft at mailman.qth.net>
Subject: [Elecraft] High SWR no power out
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
I have a K3 that quit transmitting on SSB last night so I connected an
SWR/Wattmeter/Dummy Load directly to Antenna 1. I held down the xmit button
and the display reads 16 watts. 99-1 high swr. I have the optional
antenna tuner but it is in the bypass mode. I also tried selecting ANT2
with the same results.. Anyone have any ideas before I send it back to the
factory for repair?
Dennis WR5DC
------------------------------
Message: 29
Date: Thu, 5 Nov 2015 07:30:47 -0800
From: Robert Harmon <k6uj at pacbell.net>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Soldering crimped connectors is not a good
thing.
Message-ID: <563B7627.3050508 at pacbell.net>
Content-Type: text/plain; charset=windows-1252; format=flowed
thanks Mike, good info !
73
Bob
K6UJ
On 11/5/15 7:18 AM, Michael Blake wrote:
> While many people recommend soldering crimped connectors, such as Anderson
Power Poles, it is not a very good idea. The reason(s) it is neither
required, nor desired, is partially as follows:
>
> 1. A PROPERLY crimped connection creates a molecular bond between the
conductor and the connector that is more conductive than soldering.
> 2. The soldering process causes corrosion because even rosin core solder
is slightly acidic.
> 3. The solder that flows into or onto the conductor (wire) causes it to
stiffen and increases the probability that vibration or movement will cause
the wire to break at that point.
> 4. The annealing of the copper wire is altered which also increases the
possibility of wire breakage due to vibration or movement.
>
> It is absolutely necessary that the proper tool be used for the connection
being crimped. If you are going to use a crimped connection it is
imperative that you have a tool that matches the connector. If you do not
have the proper tool then DO NOT use crimped connections.
>
> Michael Blake
> k9jri at outlook.com
>
>
>
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