[Elecraft] Elecraft Digest, Vol 207, Issue 16
n4cc at windstream.net
n4cc at windstream.net
Sat Jul 17 15:41:22 EDT 2021
This list is for 160 meter issues --not for chemistry. There was only one
response that was accurate -- from Dr. Schmidt. Brian started the
discussion talking about isopropyl alcohol -- not ethyl alcohol and it turns
out many don't recognize the difference. Hope you don't drink 99%
IPA....but it would "clean up" this list if you did. 73, Greg-N4CC
-----Original Message-----
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Behalf Of elecraft-request at mailman.qth.net
Sent: Saturday, July 17, 2021 11:10 AM
To: elecraft at mailman.qth.net
Subject: Elecraft Digest, Vol 207, Issue 16
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Today's Topics:
1. Re: Broke my K2 :( (John Marvin)
2. Re: Broke my K2 :( (jerry)
3. Re: Broke my K2 :( (Don Wilhelm)
4. Re: Broke my K2 :( (wb6rse1 at mac.com)
5. 99.9 % alcohol (brianpepperdine brianpepperdine)
6. Re: 99.9 % alcohol (John Simmons)
7. Re: 99.9 % alcohol (John Marvin)
8. Re: 99.9 % alcohol (Ed Pflueger)
9. Re: 99.9 % alcohol (Dr. William J. Schmidt)
10. Fw: 99.9 % alcohol (James Driskell)
11. Re: 99.9 % alcohol (MIKE ZANE)
12. Re: Broke my K2 :( (Alan Bloom)
13. Re: K2 Only 30-metre Band Works (VA1CQ)
14. Re: Broke my K2 :( (Louandzip)
15. Re: Broke my K2 :( (Clay Autery)
16. Nabble down (Barry)
17. Flaky mic jack on KX3 (Walter Underwood)
18. Re: Flaky mic jack on KX3 (Lyn Norstad)
19. FS: KX3 with all the internal options and accesories (AL7CR)
20. Background RF noise from a KPA1500 amp (Louis Fiore)
21. W2 Sensors - calibration (Michael Walker)
22. WTB: KPA100/KAT100/EC2 (Ed G)
----------------------------------------------------------------------
Message: 1
Date: Wed, 14 Jul 2021 17:06:18 -0600
From: John Marvin <jm-ec at themarvins.org>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Broke my K2 :(
Message-ID: <bcc18728-b6e4-2d12-9e7e-96fb95929442 at themarvins.org>
Content-Type: text/plain; charset=utf-8; format=flowed
Hopefully this is obvious, but make sure you are using the 90-91% isopropyl
alcohol, and not the 70% variety. It can still be hard to get the 90%
variety these days.
73,
John? - AC0ZG
On 7/14/2021 4:41 PM, Peter Eijlander (PA0PJE) wrote:
> Yes Jerry, isopropyl alcohol does this!
> I once cleaned a working print of a GPS receiver with isopropyl
> alcohol and it stopped working. Letting it be and trying it again next
> day turned out it worked perfectly again.
>
> ?From then on I leave a PCB to rest after cleaning to have the IPA dry
> out completely...
>
> 73,
> Peter - PA0PJE
>
>
>
>
>
> Op 14-07-2021 om 14:54 schreef jerry:
>> Actually, I suspect that when I scrubbed it with isopropyl alcohol,
>> it shorted out
> ______________________________________________________________
> 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
> jm-ec at themarvins.org
------------------------------
Message: 2
Date: Wed, 14 Jul 2021 16:20:01 -0700
From: jerry <jerry at tr2.com>
To: John Marvin <jm-ec at themarvins.org>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Broke my K2 :(
Message-ID: <5671721566b62ddc9e0174f43f128f77 at tr2.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Yup, it's the 90% stuff. It was impossible to get a year ago, but not too
bad now. Still, I had to wait a month or so when I ordered it from Amazon.
- Jerry KF6VB
On 2021-07-14 16:06, John Marvin wrote:
> Hopefully this is obvious, but make sure you are using the 90-91%
> isopropyl alcohol, and not the 70% variety. It can still be hard to
> get the 90% variety these days.
>
> 73,
> John? - AC0ZG
>
> On 7/14/2021 4:41 PM, Peter Eijlander (PA0PJE) wrote:
>> Yes Jerry, isopropyl alcohol does this!
>> I once cleaned a working print of a GPS receiver with isopropyl
>> alcohol and it stopped working. Letting it be and trying it again
>> next day turned out it worked perfectly again.
>>
>> ?From then on I leave a PCB to rest after cleaning to have the IPA
>> dry out completely...
>>
>> 73,
>> Peter - PA0PJE
>>
>>
>>
>>
>>
>> Op 14-07-2021 om 14:54 schreef jerry:
>>> Actually, I suspect that when I scrubbed it with isopropyl alcohol,
>>> it shorted out
>> ______________________________________________________________
>> 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
>> jm-ec at themarvins.org
>
>
> ______________________________________________________________
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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> list: http://www.qsl.net/donate.html Message delivered to
> jerry at tr2.com
------------------------------
Message: 3
Date: Wed, 14 Jul 2021 19:20:58 -0400
From: Don Wilhelm <don at w3fpr.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Broke my K2 :(
Message-ID: <81afb229-7701-958a-db18-56c35bae0ae8 at w3fpr.com>
Content-Type: text/plain; charset=utf-8; format=flowed
When I have cleaned boards with IPA or other cleaners, I apply the IPA only
in a small spot with a q-tip and then blot it with a paper towel to help dry
it - do not flood the board.
I generally do not recommend cleaning boards, solder flux is non-conductive
and will normally not cause a problem.
I only clean when the solder flux residue is really nasty as might occur
with Kester 44 solder.
Use of a solder with a mildly reactive flux (Kester 385) will reduce the
need for cleaning the board - there is almost no residue.
If you do choose to clean the board, make sure your cleaning work is
complete.? While solder flux is non-conductive, the flux plus the cleaner
may be conductive leading to resistive leakage paths. If you can see any
white stuff on the board, you have not done a complete job.
73,
Don W3FPR
On 7/14/2021 6:41 PM, Peter Eijlander (PA0PJE) wrote:
> Yes Jerry, isopropyl alcohol does this!
> I once cleaned a working print of a GPS receiver with isopropyl
> alcohol and it stopped working. Letting it be and trying it again next
> day turned out it worked perfectly again.
>
> ?From then on I leave a PCB to rest after cleaning to have the IPA dry
> out completely...
>
------------------------------
Message: 4
Date: Wed, 14 Jul 2021 16:37:52 -0700
From: wb6rse1 at mac.com
To: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] Broke my K2 :(
Message-ID: <1BEAEA71-F203-4A49-BD87-C29F445AED56 at mac.com>
Content-Type: text/plain; charset=us-ascii
99% Isopropyl is available from Uline. Aerospace industry standard is
Miller-Stephenson Contact Re-Nu MS-530. Evaporates quickly and leaves no
residue. Great stuff but pricey and you'll have to work to find it.
GL - Steve WB6RSE
>
> Yup, it's the 90% stuff. It was impossible to get a year ago, but not
> too bad now. Still, I had to wait a month or so when I ordered it
> from Amazon.
>
> - Jerry KF6VB
>
>
>
> On 2021-07-14 16:06, John Marvin wrote:
>> Hopefully this is obvious, but make sure you are using the 90-91%
>> isopropyl alcohol, and not the 70% variety. It can still be hard to
>> get the 90% variety these days.
>> 73,
>> John - AC0ZG
>> On 7/14/2021 4:41 PM, Peter Eijlander (PA0PJE) wrote:
>>> Yes Jerry, isopropyl alcohol does this!
>>> I once cleaned a working print of a GPS receiver with isopropyl alcohol
and it stopped working. Letting it be and trying it again next day turned
out it worked perfectly again.
>>> From then on I leave a PCB to rest after cleaning to have the IPA dry
out completely...
>>> 73,
>>> Peter - PA0PJE
------------------------------
Message: 5
Date: Wed, 14 Jul 2021 19:41:17 -0400 (EDT)
From: brianpepperdine brianpepperdine <brianpepperdine at sympatico.ca>
To: Elecraft <elecraft at mailman.qth.net>
Subject: [Elecraft] 99.9 % alcohol
Message-ID:
<988950577.220969.1626306077457.JavaMail.open-xchange at torgui04>
Content-Type: text/plain; charset=UTF-8
I have no idea, obviously, what the USA market offers, but here we get 99.9%
(not 90%) isoprophyl alcohol. So much the better re. less residue of course.
Admittedly it was a bit hard to get at the beginning of the pandemic but
that seemed resolved with a couple months.
Ages past I had to ask the pharmacist for it and he decanted it from a large
bottle behind the counter into a small bottle for me.
He said you are either diabetic or into electronics, as I think that was the
main call for it. Largely they sold the smaller percentage stuff for rubbing
and sores.
Here is is stocked on the shelf now already packaged, in the first aid area
(right next to the alcohol swabs).
If hard to find you might ask your pharmacist.. its possible they have it
behind the counter for the real need purposes, or he can suggest if he can
order-in.
You never know. I doubt at this time now that there is any real supply
shortage, IMHO"
Brian VE3HI Toronto
------------------------------
Message: 6
Date: Wed, 14 Jul 2021 18:51:18 -0500
From: John Simmons <jasimmons at pinewooddata.com>
To: Elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] 99.9 % alcohol
Message-ID: <68904566-53ec-31ba-50f2-d80893b184ee at pinewooddata.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Here in the USA it is called 'denatured alchohol'. Cheapest to buy in the
paint department of the big-box stores. Or, at the liquor store as
"Everclear" hi hi
-de John NI0K
brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM:
> I have no idea, obviously, what the USA market offers, but here we get
> 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of
course.
> Admittedly it was a bit hard to get at the beginning of the pandemic
> but that seemed resolved with a couple months.
>
> Ages past I had to ask the pharmacist for it and he decanted it from a
> large bottle behind the counter into a small bottle for me.
> He said you are either diabetic or into electronics, as I think that
> was the main call for it. Largely they sold the smaller percentage
> stuff for rubbing and sores.
> Here is is stocked on the shelf now already packaged, in the first aid
> area (right next to the alcohol swabs).
>
> If hard to find you might ask your pharmacist.. its possible they have
> it behind the counter for the real need purposes, or he can suggest if he
can order-in.
> You never know. I doubt at this time now that there is any real supply
> shortage, IMHO"
>
> Brian VE3HI Toronto
> ______________________________________________________________
> 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
> jasimmons at pinewooddata.com
------------------------------
Message: 7
Date: Wed, 14 Jul 2021 17:59:31 -0600
From: John Marvin <jm-ec at themarvins.org>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] 99.9 % alcohol
Message-ID: <af93cad3-ef98-3e29-ff78-8e37bc508b72 at themarvins.org>
Content-Type: text/plain; charset=utf-8; format=flowed
Anything above 95% or so requires processes beyond just distillation, i.e.
you are getting into the lab grade region. Prices usually go up
significantly for that.
Of course, in many states you can buy 190 proof Everclear (95% grain
alcohol) at a liquor store.? Might be easier to find than lab grade
alcohol.? One advantage is that since it is not denatured, the fumes are
significantly less toxic.
Since alcohol is hydrophilic, it helps to evaporate the water that makes up
the rest of the alcohol mixture. I suspect that getting much above 90%
doesn't yield significant improvement in evaporation time. But we obviously
have examples here where using something higher than 90% would be more
desirable if you are not spot cleaning and don't want to wait.
Regards,
John AC0ZG
On 7/14/2021 5:41 PM, brianpepperdine brianpepperdine wrote:
> I have no idea, obviously, what the USA market offers, but here we get
> 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of
course.
> Admittedly it was a bit hard to get at the beginning of the pandemic
> but that seemed resolved with a couple months.
>
> Ages past I had to ask the pharmacist for it and he decanted it from a
> large bottle behind the counter into a small bottle for me.
> He said you are either diabetic or into electronics, as I think that
> was the main call for it. Largely they sold the smaller percentage
> stuff for rubbing and sores.
> Here is is stocked on the shelf now already packaged, in the first aid
> area (right next to the alcohol swabs).
>
> If hard to find you might ask your pharmacist.. its possible they have
> it behind the counter for the real need purposes, or he can suggest if he
can order-in.
> You never know. I doubt at this time now that there is any real supply
> shortage, IMHO"
>
> Brian VE3HI Toronto
> ______________________________________________________________
> 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
> jm-ec at themarvins.org
------------------------------
Message: 8
Date: Wed, 14 Jul 2021 19:04:59 -0500
From: "Ed Pflueger" <ab4iq at comcast.net>
To: "'John Simmons'" <jasimmons at pinewooddata.com>, "'Elecraft'"
<elecraft at mailman.qth.net>
Subject: Re: [Elecraft] 99.9 % alcohol
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
I'm in Kentucky we call it White Lightening. In the Navy we used 190 proof
to clean the salinity cells.
Ed.. AB4IQ
-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of John Simmons
Sent: Wednesday, July 14, 2021 6:51 PM
To: Elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] 99.9 % alcohol
Here in the USA it is called 'denatured alchohol'. Cheapest to buy in the
paint department of the big-box stores. Or, at the liquor store as
"Everclear" hi hi
-de John NI0K
brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM:
> I have no idea, obviously, what the USA market offers, but here we get
> 99.9% (not 90%) isoprophyl alcohol. So much the better re. less
> residue of
course.
> Admittedly it was a bit hard to get at the beginning of the pandemic
> but that seemed resolved with a couple months.
>
> Ages past I had to ask the pharmacist for it and he decanted it from a
> large bottle behind the counter into a small bottle for me.
> He said you are either diabetic or into electronics, as I think that
> was the main call for it. Largely they sold the smaller percentage
> stuff for rubbing and sores.
> Here is is stocked on the shelf now already packaged, in the first aid
> area (right next to the alcohol swabs).
>
> If hard to find you might ask your pharmacist.. its possible they have
> it behind the counter for the real need purposes, or he can suggest if
> he
can order-in.
> You never know. I doubt at this time now that there is any real supply
> shortage, IMHO"
>
> Brian VE3HI Toronto
> ______________________________________________________________
> 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
> jasimmons at pinewooddata.com
______________________________________________________________
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 ab4iq at comcast.net
------------------------------
Message: 9
Date: Wed, 14 Jul 2021 19:08:17 -0500
From: "Dr. William J. Schmidt" <bill at wjschmidt.com>
To: <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] 99.9 % alcohol
Message-ID: <[email protected]>
Content-Type: text/plain; charset="UTF-8"
Isopropanol is never denatured because its not consumable by humans. Only
materials that are consumable are denatured, and that is usually done by
adding natural gasoline (pentanes) to make it poison, and this is usually
used in the fuel industry for blending with gasoline. Ethanol (drinkable)
is, indeed a maximum of 90% pure due to the azeotrope that is formed with
ethanol and water that causes a pinch point and lack of ability to distill
it into a more pure form. Distilling above 90% can be done by adding a
third substance to get around the Azeotropic pinch point, or by use of
sieves to absorb water.
Dr. William J. Schmidt (one of my Ph.D. is in Chemical Engineering)
-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of John Marvin
Sent: Wednesday, July 14, 2021 7:00 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] 99.9 % alcohol
Anything above 95% or so requires processes beyond just distillation, i.e.
you are getting into the lab grade region. Prices usually go up
significantly for that.
Of course, in many states you can buy 190 proof Everclear (95% grain
alcohol) at a liquor store. Might be easier to find than lab grade alcohol.
One advantage is that since it is not denatured, the fumes are significantly
less toxic.
Since alcohol is hydrophilic, it helps to evaporate the water that makes up
the rest of the alcohol mixture. I suspect that getting much above 90%
doesn't yield significant improvement in evaporation time. But we obviously
have examples here where using something higher than 90% would be more
desirable if you are not spot cleaning and don't want to wait.
Regards,
John AC0ZG
On 7/14/2021 5:41 PM, brianpepperdine brianpepperdine wrote:
> I have no idea, obviously, what the USA market offers, but here we get
> 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue of
course.
> Admittedly it was a bit hard to get at the beginning of the pandemic
> but that seemed resolved with a couple months.
>
> Ages past I had to ask the pharmacist for it and he decanted it from a
> large bottle behind the counter into a small bottle for me.
> He said you are either diabetic or into electronics, as I think that
> was the main call for it. Largely they sold the smaller percentage
> stuff for rubbing and sores.
> Here is is stocked on the shelf now already packaged, in the first aid
> area (right next to the alcohol swabs).
>
> If hard to find you might ask your pharmacist.. its possible they have
> it behind the counter for the real need purposes, or he can suggest if he
can order-in.
> You never know. I doubt at this time now that there is any real supply
> shortage, IMHO"
>
> Brian VE3HI Toronto
> ______________________________________________________________
> 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
> jm-ec at themarvins.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 bill at wjschmidt.com
--
This email has been checked for viruses by AVG.
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------------------------------
Message: 10
Date: Thu, 15 Jul 2021 00:14:20 +0000
From: James Driskell <jmdriskell at msn.com>
To: Elecraft Reflector <elecraft at mailman.qth.net>
Subject: [Elecraft] Fw: 99.9 % alcohol
Message-ID:
<MW2PR1501MB207435F3D3828BB26D83CBAAC0129 at MW2PR1501MB2074.namprd15.prod.outl
ook.com>
Content-Type: text/plain; charset="iso-8859-1"
________________________________
From: James Driskell <jmdriskell at msn.com>
Sent: Wednesday, July 14, 2021 17:11
To: John Simmons <jasimmons at pinewooddata.com>
Subject: Re: [Elecraft] 99.9 % alcohol
Not quite. Denatured alcohol is ethyl alcohol that contains methyl alcohol
or isopropyl alcohol which make the mixture unfit for drinking. Pure ethyl
alcohol is drinkable (it's the kick in your booze), but probably contains at
least 5% water because of its nature to absorb water. Absolute ethyl or
isopropyl alcohol is at least 99% pure. Unless securely sealed, the
alcohols will absorb water winding up at about 95+% alcohol. 99% isopropyl
alcohol is available from https://artnaturals.com/
[https://artnaturals.com/media/default/default/MainBanner_Mobile.jpg]<https:
//artnaturals.com/>
Essential Oils | Diffusers | Skin & Bath & Body | Hair
Care<https://artnaturals.com/>
Try artnaturals? 100% Pure Essential Oils, Argan Oil hair care, skin care,
bath and body beauty products. Over 4 Million sold, made with only natural
and organic ingredients.
artnaturals.com
Everclear (sometimes called Georgia Moon) may run as high as 95% (190
proof), but you need to be careful with that stuff because it will stomp you
and you don't dare smoke for 48 hours.
73,
Jim Driskell
W7OWI
________________________________
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on
behalf of John Simmons <jasimmons at pinewooddata.com>
Sent: Wednesday, July 14, 2021 16:51
To: Elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] 99.9 % alcohol
Here in the USA it is called 'denatured alchohol'. Cheapest to buy in
the paint department of the big-box stores. Or, at the liquor store as
"Everclear" hi hi
-de John NI0K
brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM:
> I have no idea, obviously, what the USA market offers, but here we get
99.9%
> (not 90%) isoprophyl alcohol. So much the better re. less residue of
course.
> Admittedly it was a bit hard to get at the beginning of the pandemic but
that
> seemed resolved with a couple months.
>
> Ages past I had to ask the pharmacist for it and he decanted it from a
large
> bottle behind the counter into a small bottle for me.
> He said you are either diabetic or into electronics, as I think that was
the
> main call for it. Largely they sold the smaller percentage stuff for
rubbing and
> sores.
> Here is is stocked on the shelf now already packaged, in the first aid
area
> (right next to the alcohol swabs).
>
> If hard to find you might ask your pharmacist.. its possible they have it
behind
> the counter for the real need purposes, or he can suggest if he can
order-in.
> You never know. I doubt at this time now that there is any real supply
shortage,
> IMHO"
>
> Brian VE3HI Toronto
> ______________________________________________________________
> 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 jasimmons at pinewooddata.com
______________________________________________________________
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 jmdriskell at msn.com
------------------------------
Message: 11
Date: Wed, 14 Jul 2021 17:41:53 -0700 (PDT)
From: MIKE ZANE <n6zw at comcast.net>
To: Ed Pflueger <ab4iq at comcast.net>, John Simmons
<jasimmons at pinewooddata.com>, Elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] 99.9 % alcohol
Message-ID: <1374615547.240419.1626309713793 at connect.xfinity.com>
Content-Type: text/plain; charset=UTF-8
AKA "Torpedo Juice"?
> On 07/14/2021 5:04 PM Ed Pflueger <ab4iq at comcast.net> wrote:
>
>
> I'm in Kentucky we call it White Lightening. In the Navy we used 190
proof
> to clean the salinity cells.
>
> Ed.. AB4IQ
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of John Simmons
> Sent: Wednesday, July 14, 2021 6:51 PM
> To: Elecraft <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] 99.9 % alcohol
>
> Here in the USA it is called 'denatured alchohol'. Cheapest to buy in the
> paint department of the big-box stores. Or, at the liquor store as
> "Everclear" hi hi
>
> -de John NI0K
>
> brianpepperdine brianpepperdine wrote on 7/14/2021 6:41 PM:
> > I have no idea, obviously, what the USA market offers, but here we get
> > 99.9% (not 90%) isoprophyl alcohol. So much the better re. less residue
of
> course.
> > Admittedly it was a bit hard to get at the beginning of the pandemic
> > but that seemed resolved with a couple months.
> >
> > Ages past I had to ask the pharmacist for it and he decanted it from a
> > large bottle behind the counter into a small bottle for me.
> > He said you are either diabetic or into electronics, as I think that
> > was the main call for it. Largely they sold the smaller percentage
> > stuff for rubbing and sores.
> > Here is is stocked on the shelf now already packaged, in the first aid
> > area (right next to the alcohol swabs).
> >
> > If hard to find you might ask your pharmacist.. its possible they have
> > it behind the counter for the real need purposes, or he can suggest if
he
> can order-in.
> > You never know. I doubt at this time now that there is any real supply
> > shortage, IMHO"
> >
> > Brian VE3HI Toronto
> > ______________________________________________________________
> > Elecraft mailing list
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> >
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> > list: http://www.qsl.net/donate.html Message delivered to
> > jasimmons at pinewooddata.com
>
> ______________________________________________________________
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> delivered to ab4iq at comcast.net
>
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------------------------------
Message: 12
Date: Thu, 15 Jul 2021 04:06:02 -0600
From: Alan Bloom <n1al at sonic.net>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Broke my K2 :(
Message-ID: <dfcc16a4-0d84-97e9-f0f3-faf5308fc6f3 at sonic.net>
Content-Type: text/plain; charset=utf-8; format=flowed
Don is exactly right about this.? When I was at HP/Agilent, the company
directive was generally not to try to clean the rosin with alcohol.?
(Rosin-core solder was used only in rework.)? The rosin contains an acid
to help with the soldering, but the acid is locked up inside the rosin
where it does no harm.? Once you dissolve the rosin with the alcohol it
spreads out and can cause leakage paths between connections.? Just leave
the rosin there; it does no harm
HP did clean production boards after going through the wave solder
machine.? But that used a water-soluble flux and the cleaning process
was thorough enough to completely remove all traces of flux.? That's
basically not possible using alcohol and cotton swabs on rosin.
Alan N1AL
On 7/14/2021 5:20 PM, Don Wilhelm wrote:
> When I have cleaned boards with IPA or other cleaners, I apply the IPA
> only in a small spot with a q-tip and then blot it with a paper towel
> to help dry it - do not flood the board.
> I generally do not recommend cleaning boards, solder flux is
> non-conductive and will normally not cause a problem.
> I only clean when the solder flux residue is really nasty as might
> occur with Kester 44 solder.
> Use of a solder with a mildly reactive flux (Kester 385) will reduce
> the need for cleaning the board - there is almost no residue.
>
> If you do choose to clean the board, make sure your cleaning work is
> complete.? While solder flux is non-conductive, the flux plus the
> cleaner may be conductive leading to resistive leakage paths. If you
> can see any white stuff on the board, you have not done a complete job.
>
> 73,
> Don W3FPR
>
> On 7/14/2021 6:41 PM, Peter Eijlander (PA0PJE) wrote:
>> Yes Jerry, isopropyl alcohol does this!
>> I once cleaned a working print of a GPS receiver with isopropyl
>> alcohol and it stopped working. Letting it be and trying it again
>> next day turned out it worked perfectly again.
>>
>> ?From then on I leave a PCB to rest after cleaning to have the IPA
>> dry out completely...
------------------------------
Message: 13
Date: Thu, 15 Jul 2021 08:15:58 -0300
From: VA1CQ <mlycan at eastlink.ca>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Only 30-metre Band Works
Message-ID: <5085d36b-0572-e767-5477-fe61090bb4d8 at eastlink.ca>
Content-Type: text/plain; charset=utf-8; format=flowed
Don,
I borrowed a couple of new relays from my KAT2 kit. I installed K1 and
K2 with the correct orientation this time. This immediately resolved all
transmit and receive problems. I have pushed on to successfully build
the KNB2, KBT2 and I'm now working on the KSB2. No further problems have
been found. The K160RX, KAT2 and KIO2 will follow these. My replacement
relays are on the way to me from Elecraft. I'm having fun again.
I have downloaded Spectrogram and I'll use it for filter alignment as
soon as I complete the KSB2 just to be thorough but I'm already happy
with the way the K2 is working. I've also bookmarked your web page since
I see lots of useful articles.
This email list sure is a useful resource.
73,
Murray VA1CQ
--
This email has been checked for viruses by AVG.
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------------------------------
Message: 14
Date: Thu, 15 Jul 2021 11:49:34 +0000 (UTC)
From: Louandzip <louandzip at yahoo.com>
To: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Broke my K2 :(
Message-ID: <654121906.176873.1626349774651 at mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
Yep.?? I worked at an company where we had some boards with very high
impedance circuitry (with the usual guard rings etc.).? We tried many things
trying to get wave soldering and aqueous flux to work, but no amount of
rinsing washing got the surface conductivity down to where we needed it . We
wound up using mildly active rosin based flux on those boards.
The diluent in 70 and 91% isopropanol is water.? 99.9% isopropanol will only
be 99.9% when you first open the bottle.? It starts aggressively absorbing
water from the atmosphere as soon as exposed.?
Lou W7HV
On Thursday, July 15, 2021, 4:06:54 AM MDT, Alan Bloom <n1al at sonic.net>
wrote:
Don is exactly right about this.? When I was at HP/Agilent, the company
directive was generally not to try to clean the rosin with alcohol.?
(Rosin-core solder was used only in rework.)? The rosin contains an acid
to help with the soldering, but the acid is locked up inside the rosin
where it does no harm.? Once you dissolve the rosin with the alcohol it
spreads out and can cause leakage paths between connections.? Just leave
the rosin there; it does no harm
HP did clean production boards after going through the wave solder
machine.? But that used a water-soluble flux and the cleaning process
was thorough enough to completely remove all traces of flux.? That's
basically not possible using alcohol and cotton swabs on rosin.
Alan N1AL
On 7/14/2021 5:20 PM, Don Wilhelm wrote:
> When I have cleaned boards with IPA or other cleaners, I apply the IPA
> only in a small spot with a q-tip and then blot it with a paper towel
> to help dry it - do not flood the board.
> I generally do not recommend cleaning boards, solder flux is
> non-conductive and will normally not cause a problem.
> I only clean when the solder flux residue is really nasty as might
> occur with Kester 44 solder.
> Use of a solder with a mildly reactive flux (Kester 385) will reduce
> the need for cleaning the board - there is almost no residue.
>
> If you do choose to clean the board, make sure your cleaning work is
> complete.? While solder flux is non-conductive, the flux plus the
> cleaner may be conductive leading to resistive leakage paths. If you
> can see any white stuff on the board, you have not done a complete job.
>
> 73,
> Don W3FPR
>
> On 7/14/2021 6:41 PM, Peter Eijlander (PA0PJE) wrote:
>> Yes Jerry, isopropyl alcohol does this!
>> I once cleaned a working print of a GPS receiver with isopropyl
>> alcohol and it stopped working. Letting it be and trying it again
>> next day turned out it worked perfectly again.
>>
>> ?From then on I leave a PCB to rest after cleaning to have the IPA
>> dry out completely...
______________________________________________________________
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Message delivered to louandzip at yahoo.com
------------------------------
Message: 15
Date: Thu, 15 Jul 2021 07:40:27 -0500
From: Clay Autery <ky5g at montac.com>
To: Louandzip via Elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Broke my K2 :(
Message-ID: <93b917e9-8a93-4155-a482-8e9732f4deb6 at edison>
Content-Type: text/plain; charset="utf-8"
You can radically mitigate the issue by using a secondary container for that
which you'll use in a week or so, and only open the quart/gallon to dispense
to working container.
I have dry argon in my shack to purge gas space in any container that is
hygroscopic or oxidizes in presence of atmosphere.
I use 99.9 for cleaning all boards (flush after "scrub"). Where allowed,
I follow up with RODI water flush and forced air drying.
Clay Autery
KY5G
>
> On Jul 15, 2021 at 06:51, Louandzip via Elecraft
<elecraft at mailman.qth.net> wrote:
>
>
> 99.9% isopropanol will only be 99.9% when you first open the bottle. It
starts aggressively absorbing water from the atmosphere as soon as exposed.
>
> Lou W7HV
------------------------------
Message: 16
Date: Thu, 15 Jul 2021 07:30:21 -0600
From: Barry <w2up at comcast.net>
To: elecraft at mailman.qth.net
Subject: [Elecraft] Nabble down
Message-ID: <ded418e2-69d1-ab24-2904-f04fb1342185 at comcast.net>
Content-Type: text/plain; charset=utf-8; format=flowed
Nabble has been unavailable (DNS error) to read the kist for a few
days.? Temporary glitch or is it gone forever?
Barry W2UP
------------------------------
Message: 17
Date: Thu, 15 Jul 2021 10:50:42 -0700
From: Walter Underwood <wunder at wunderwood.org>
To: Reflector Elecraft <elecraft at mailman.qth.net>
Subject: [Elecraft] Flaky mic jack on KX3
Message-ID: <9A29C724-5EC7-46E6-9B20-D4834EF1EE66 at wunderwood.org>
Content-Type: text/plain; charset=utf-8
The mic jack on my KX3 is not making good contact with my MH3. I need to
push the plug in an extra bit, then feel a small click, then PTT works. If I
move the cable at all, it backs out past that click and the PTT switch
doesn?t make the rig transmit. The same thing happens with other plugs.
This is a fairly early model, serial number 29xx.
Any ideas other than sending it in for repair?
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
------------------------------
Message: 18
Date: Thu, 15 Jul 2021 18:52:22 -0000
From: "Lyn Norstad" <Lyn at LNAINC.com>
To: "'Walter Underwood'" <wunder at wunderwood.org>, "'Reflector
Elecraft'" <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Flaky mic jack on KX3
Message-ID: <[email protected]>
Content-Type: text/plain; charset="UTF-8"
You could try to replace the jack yourself. It's an uncommon size (TRRS),
but Philmore #70-088 should work:
https://shopintertex.com/philmore-70-088-chassis-mt-female-jack-3-5mm-4-cond
uctor.html?gclid=Cj0KCQjwub-HBhCyARIsAPctr7y3_kdB6IO7H2ehsuk2J5Ogwgfu2jpcBB2
wN-453t_tS2F43g2z7JoaAlkZEALw_wcB
73
Lyn, W0LEN
-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Walter Underwood
Sent: Thursday, July 15, 2021 5:51 PM
To: Reflector Elecraft
Subject: [Elecraft] Flaky mic jack on KX3
The mic jack on my KX3 is not making good contact with my MH3. I need to
push the plug in an extra bit, then feel a small click, then PTT works. If I
move the cable at all, it backs out past that click and the PTT switch
doesn?t make the rig transmit. The same thing happens with other plugs.
This is a fairly early model, serial number 29xx.
Any ideas other than sending it in for repair?
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
______________________________________________________________
Elecraft mailing list
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Message delivered to lyn at lnainc.com
------------------------------
Message: 19
Date: Thu, 15 Jul 2021 13:28:09 -0700
From: AL7CR <al7cr at mooseaviation.com>
To: Elecraft <elecraft at mailman.qth.net>
Subject: [Elecraft] FS: KX3 with all the internal options and
accesories
Message-ID: <e5017155-28f8-4a2f-a671-af3b1fcd618f at www.fastmail.com>
Content-Type: text/plain
I am offering my KX3 for sale. It is in very nice condition and functions
as new. All the available internal options are installed. It will ship
with the full original cable set, the printed manuals, and the accessories
listed below. The installed options are:
KXAT3 20 watt ATU
KX3-2M 2 meter module
KXBC3 NiMh Internal Charger with Real Time Clock
KCFL3 Dual Bandwidth Roofing Filter
The accessories included are:
KC3-PCKT Cable Set
MH-3 Hand Mike
XG50 Signal Source
The entire package is $1400 shipped in the US.
Payment via Paypal.
------------------------------
Message: 20
Date: Sat, 17 Jul 2021 11:44:40 -0400
From: Louis Fiore <ltfiore at aol.com>
To: Elecraft at mailman.qth.net
Subject: [Elecraft] Background RF noise from a KPA1500 amp
Message-ID: <10216A7E-C978-4DFA-B511-3432A4024D4C at aol.com>
Content-Type: text/plain; charset=utf-8
Good morning,
Has anyone noticed a slight background noise increase from both the KPA1500
amp and its power supply? It seems the background noise on the waterfall of
my Flex radio goes down about 2 db when I turn off the amp and another db or
so when I turn off the power supply. It?s about a 3 db overall increase when
both are on. I?ve noticed this on 80 meters and to a lesser extent on 40
meters. It is imperceptible on 20 meters. There?s too much local noise to
see anything on 160 meters.
73, Lou W2LTF
------------------------------
Message: 21
Date: Sat, 17 Jul 2021 12:06:06 -0400
From: Michael Walker <va3mw at portcredit.net>
To: "Elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Subject: [Elecraft] W2 Sensors - calibration
Message-ID:
<CA+33ts5HO8avauLZLZBufUSjxT21EP-+eTs3YkQVcygZNDgShg at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Hi All
At the moment, I am using a 200 watt HF W2 Sensor on VHF, and while I
realize it isn't far from perfect, it is perfectly good enough to tell me
if I have LOTS of watts out on a remote VHF station or no watts out.
I could calibrate it against a known good watt meter if need as that is
easy enough to do.
Or, could I convert it to a VHF 200 watt sensor as it looks like Elecraft
is not stocking them anymore based on trying to order a couple from the web
page.
The W2 is a great meter for remote operation and we actually use NodeRed on
a RPI to make it web readable.
Mike va3mw
------------------------------
Message: 22
Date: Sat, 17 Jul 2021 13:08:44 -0400
From: Ed G <ed.n3cw at gmail.com>
To: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Subject: [Elecraft] WTB: KPA100/KAT100/EC2
Message-ID: <60f30e9c.1c69fb81.fd757.3a9f at mx.google.com>
Content-Type: text/plain; charset="utf-8"
Looking to buy a KPA100 amp and KAT100 tuner in the EC2 enclosure. Thanks
for info?
--Ed, N3CW?
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