[Elecraft] Combo pre-amp
Greg Wilson
n4cc at windstream.net
Sun May 26 06:46:41 EDT 2013
I hope Eric and Wayne are reading this one, Joe!
73, Greg-N4CC
----- Original Message -----
From: "Joe Subich, W4TV" <lists at subich.com>
To: "Gary Gregory" <vk1zzgary at gmail.com>
Cc: "elecraft List" <elecraft at mailman.qth.net>
Sent: Saturday, May 25, 2013 11:04 PM
Subject: Re: [Elecraft] Combo pre-amp
>
> I don't know about that ... the incremental cost for the KXV3A
> vs. KXV3 was minimal. The firmware changes to support two more
> control lines should be minimal.
>
> As far as an internal preamp - it should not be significantly more
> complex than the PR6. With switching on a "KVX3B", an internal
> preamp would not need the bypass relays so they could be used for
> band switching if needed. However, if the user did not want a
> 10/12 preamp, it would not be a stretch to use the existing PR6
> internally for six meters only.
>
> One would think it relatively straightforward to switch two input
> tuning/matching networks in a PR6 style preamp or an alternate,
> broadband design could be used to completely avoid the need for
> band switching. With a little care in the design and programming,
> a higher gain/lower nf preamp could be substituted (electronically)
> for the standard preamp or the controls could be arranged to cycle
> through "none"/"norm"/"opt".
>
> 73,
>
> ... Joe, W4TV
>
>
> On 5/25/2013 10:48 PM, Gary Gregory wrote:
>> Ah Joe,
>>
>> Thankyou for resurrecting my thought that it IS possible. The issue will
>> most likely be a lack of quantity that would be sold versus the cost to
>> manufacture,
>>
>> I will live in hope...:-)
>>
>> thanks for the info Joe, much appreciated.
>>
>> 73
>>
>> Gary
>>
>> On 26 May 2013 12:45, Joe Subich, W4TV <lists at subich.com> wrote:
>>
>>>
>>>> let's not let that technical inconvenience reduce in any
>>>> way my hope for a cure to my sometimes demented desires....:-)
>>>
>>> I'm not saying it isn't possible ... takes one additional relay
>>> and two connectors. There are even couple unused control lines
>>> on the KXV3A that could be used to control the added relay and
>>> switch bands (10/12 and 6 M) if necessary.
>>>
>>> 73,
>>>
>>> ... Joe, W4TV
>>>
>>>
>>> On 5/25/2013 10:13 PM, Gary Gregory wrote:
>>>
>>>> Hi Joe,
>>>>
>>>> Gee...Shhhhh....let's not let that technical inconvenience reduce in
>>>> any
>>>> way my hope for a cure to my sometimes demented desires....:-)
>>>>
>>>> Of course you are quite correct Joe. Point taken mate.
>>>>
>>>> 73
>>>>
>>>> Gary
>>>>
>>>> On 26 May 2013 12:06, Joe Subich, W4TV <lists at subich.com> wrote:
>>>>
>>>>
>>>>> So, I will continue to want an internal pre-amp and it does not
>>>>> need
>>>>>
>>>>>> to be for 6M as I don't operate there either. This is MY choice and
>>>>>> does not hold sway with the masses but it is my choice after all.
>>>>>>
>>>>>>
>>>>> I agree that an internal preamp (or premps) would be ideal. However,
>>>>> in addition to the preamp(s) Elecraft would need to provide *another*
>>>>> design for the KXV3A - one that switches the RX ANT IN/OUT connections
>>>>> to internal jacks - as neither the original KXV3 or current KXV3A have
>>>>> that capability.
>>>>>
>>>>> 73,
>>>>>
>>>>> ... Joe, W4TV
>>>>>
>>>>>
>>>>> On 5/25/2013 9:24 PM, Gary Gregory wrote:
>>>>>
>>>>> I don't wish to flog a dead horse any further, however, choice is
>>>>>> something
>>>>>> it seems everyone on this list is after.
>>>>>>
>>>>>> So what if a K3 needs to NOT have a 2M transverter to fit a combo
>>>>>> pre-amp?....there are many K3's in the world not fitted with 2M. This
>>>>>> is a
>>>>>> choice made by the original owner I guess which is what it is, a
>>>>>> choice. I
>>>>>> fully appreciate everyone's point of view, but I would hazard a guess
>>>>>> I
>>>>>> am
>>>>>> not alone in wanting an internal unit as a CHOICE, not at the expense
>>>>>> of
>>>>>> taking away other folks right to choose.
>>>>>>
>>>>>> Wayne has stated Elecraft's case and that is there is not enough room
>>>>>> but
>>>>>> his statement is qualified by the mention of the 2M option which is a
>>>>>> customer choice right?
>>>>>>
>>>>>> So, I will continue to want an internal pre-amp and it does not need
>>>>>> to
>>>>>> be
>>>>>> for 6M as I don't operate there either. This is MY choice and does
>>>>>> not
>>>>>> hold
>>>>>> sway with the masses but it is my choice after all.
>>>>>>
>>>>>> You mention remote install, fine, but again it is still another cable
>>>>>> and
>>>>>> still yet another box to cart around. Setup on a table (standard
>>>>>> picnic
>>>>>> size) the depth of the table means you need to have the K-Line right
>>>>>> on
>>>>>> the
>>>>>> rear edge and the 6M pre-amp protrudes far enough back that if you
>>>>>> are
>>>>>> up
>>>>>> against a barrier of some sort, the cables push the K-Line forward
>>>>>> and
>>>>>> reduce the work space area such that little room is left to operate
>>>>>> in a
>>>>>> comfortable manner.
>>>>>>
>>>>>> I could pontificate forever on the drawbacks when operating portable
>>>>>> but I
>>>>>> am probably not a member of the right choir.
>>>>>>
>>>>>> Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp
>>>>>> designed
>>>>>> for a K3.....now that would solve everything for me and I wouldn't
>>>>>> have
>>>>>> to
>>>>>> plead my case....:-)
>>>>>>
>>>>>> It's all about choice folks!
>>>>>>
>>>>>> 73
>>>>>>
>>>>>> Gary
>>>>>>
>>>>>> On 26 May 2013 10:32, Walter Underwood <wunder at wunderwood.org> wrote:
>>>>>>
>>>>>> The original poster mentioned "those of us who operate portable".
>>>>>> Running
>>>>>>
>>>>>>> cables to the next room does not make that any simpler.
>>>>>>>
>>>>>>> wunder
>>>>>>> K6WRU
>>>>>>>
>>>>>>> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote:
>>>>>>>
>>>>>>> This sounds like a lack of creative thinking. How about using
>>>>>>> two 90
>>>>>>>
>>>>>>>>
>>>>>>>> degree
>>>>>>>
>>>>>>> BNC elbows on the back of the radio and a couple of BNC jumpers.
>>>>>>> You
>>>>>>>> can
>>>>>>>> put the preamp anywhere... even in the next room is that is your
>>>>>>>> fancy.
>>>>>>>> Also, you might try one of the 50+ preamps that are already
>>>>>>>> available
>>>>>>>> by
>>>>>>>>
>>>>>>>> a
>>>>>>>
>>>>>>> variety of companies with ultra-low noise figures. I'm not sure I
>>>>>>>> need
>>>>>>>> a
>>>>>>>> preamp to take up the space of my existing 2 meter module.
>>>>>>>>
>>>>>>>>
>>>>>>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>>>>>>>>
>>>>>>>> Owner - Operator
>>>>>>>> Big Signal Ranch
>>>>>>>> Staunton, Illinois
>>>>>>>>
>>>>>>>> email: bill at wjschmidt.com
>>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From:
>>>>>>>> elecraft-bounces at mailman.qth.****net<elecraft-bounces at mailman.*
>>>>>>>> *qth.net <elecraft-bounces at mailman.qth.net>>
>>>>>>>> [mailto:elecraft-bounces@**mai**lman.qth.net
>>>>>>>> <http://mailman.qth.net>
>>>>>>>> <elecraft-bounces@**mailman.qth.net<elecraft-bounces at mailman.qth.net>
>>>>>>>>> ]
>>>>>>>> On Behalf Of Jeff Cochrane
>>>>>>>> Sent: Saturday, May 25, 2013 7:03 PM
>>>>>>>> To: elecraft at mailman.qth.net
>>>>>>>> Subject: Re: [Elecraft] Combo pre-amp
>>>>>>>>
>>>>>>>> Agreed Gary,
>>>>>>>> I too would be interested in an internal 10M pre-amp (or an
>>>>>>>> internal
>>>>>>>>
>>>>>>>> combo
>>>>>>>
>>>>>>> 6-10M pre-amp).
>>>>>>>> I already have the PR6 but like you say it (in stock form)
>>>>>>>> protrudes
>>>>>>>> so
>>>>>>>>
>>>>>>>> far
>>>>>>>
>>>>>>> out behind the rig that it almost impossible to use for portable
>>>>>>> work.
>>>>>>>> Mounting it internally is the way to go and I reckon a combo
>>>>>>>> pre-amp
>>>>>>>>
>>>>>>>> would
>>>>>>>
>>>>>>> sit nicely where the internal 2M transverter normally goes.
>>>>>>>>
>>>>>>>> Jeff Cochrane - VK4XA
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Gary Gregory-2 wrote
>>>>>>>>
>>>>>>>> Well I do hope there will be a version for 10M perhaps that will
>>>>>>>>> install
>>>>>>>>> within the K3. Much as it would be nice to have I am not going to
>>>>>>>>> buy
>>>>>>>>>
>>>>>>>>> more
>>>>>>>>
>>>>>>>
>>>>>>> boxes needing to be plugged in, cabled or whatever.
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Whilst I understand some folks have space available and can wire
>>>>>>>>> in
>>>>>>>>> as
>>>>>>>>> many
>>>>>>>>> boxes as are available, those of us who operate portable tire very
>>>>>>>>>
>>>>>>>>> quickly
>>>>>>>>
>>>>>>>
>>>>>>> of sorting cables, boxes and the resultant tangled leads.
>>>>>>>>
>>>>>>>>>
>>>>>>>>> I guess I will have to wait and see what is produced but another
>>>>>>>>>
>>>>>>>>> external
>>>>>>>>
>>>>>>>
>>>>>>> box such as the 6M pre-amp which protrudes too far and can easily
>>>>>>> be
>>>>>>>>
>>>>>>>>> knocked around is a non starter for me no matter that I could use
>>>>>>>>> it,
>>>>>>>>> it
>>>>>>>>> is
>>>>>>>>> what it is, a box too far.
>>>>>>>>>
>>>>>>>>> Gary
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> *Gary - VK1ZZ
>>>>>>>>> Skype: Gary.VK1ZZ
>>>>>>>>> Motorhome Portable
>>>>>>>>> The Shack*
>>>>>>>>> *Elecraft K3
>>>>>>>>> P3 Panadapter
>>>>>>>>> KPA500FT
>>>>>>>>> KAT500FT**
>>>>>>>>> KX3-K
>>>>>>>>> *
>>>>>>>>> ______________________________****____________________________**
>>>>>>>>> __**__
>>>>>>>>> Elecraft mailing list
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>>>>>>>>>>
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>>>>>>>>>>
>>>>>>>>> Post: mailto:
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Elecraft at .qth
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> This list hosted by: http://www.qsl.net
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>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> -----
>>>>>>>> Jeff Cochrane - VK4XA
>>>>>>>> East Innisfail
>>>>>>>> Queensland
>>>>>>>> Australia
>>>>>>>> K3 #4767
>>>>>>>>
>>>>>>>> --
>>>>>>>> View this message in context:
>>>>>>>>
>>>>>>>>
>>>>>>>> http://elecraft.365791.n2.**na**bble.com/Combo-pre-amp-**<http://nabble.com/Combo-pre-amp-**>
>>>>>>>>
>>>>>>> tp7573740p7574221.html<http://**elecraft.365791.n2.nabble.com/**
>>>>>>> Combo-pre-amp-**tp7573740p7574221.html<http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html>
>>>>>>>>
>>>>>>>
>>>>>>> Sent from the Elecraft mailing list archive at Nabble.com.
>>>>>>>> ______________________________****____________________________**
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>>>>>>>>>
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>>>>>>>> Elecraft mailing list
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>>>>>>>>>
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>>>>>>>>>
>>>>>>>> Post: mailto:Elecraft at mailman.qth.****net
>>>>>>>> <Elecraft at mailman.qth.net>
>>>>>>>>
>>>>>>>> This list hosted by: http://www.qsl.net
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>>>>>>>>
>>>>>>> --
>>>>>>> Walter Underwood
>>>>>>> wunder at wunderwood.org
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>>> Elecraft mailing list
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>>>>>>>>
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>>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>
>>
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