[Elecraft] new subscriber and first question

[mikefurrey at att.net]

I have a Collins 30L-1 I use with my K3. BUT several years ago (before I got 
the K3) I installed a "Soft-Key" kit from ... I think Harbach. Works fine 
and solved that problems

73, Mike WA5POK

--------------------------------------------------
From: "Vic K2VCO" <k2vco.vic at gmail.com>
Sent: Tuesday, September 03, 2013 12:14 PM
To: <elecraft at mailman.qth.net>; <dbasberg at comcast.net>
Subject: Re: [Elecraft] new subscriber and first question

> No, the K3 CANNOT switch a negative voltage for keyout! It is a 
> solid-state circuit which is quite robust (+200v at 5A), but only for 
> positive DC voltages.
>
> K3 schematics are here:
>
> <http://www.elecraft.com/manual/K3_Schematics_Jun_2010.pdf>
>
> On 8/31/2013 3:52 AM, Doug Basberg wrote:
>> Hello;
>>
>>
>>
>> I just put together my K3/100 with ATU.  What a great transceiver!
>>
>>
>>
>> Now I need to hook it to my vintage Collins 30L-1 linear amp.  The manual
>> says the K3 can handle up to 200 volts on 'key out'.  That might mean I 
>> can
>> hook up directly to the linear.  One question is whether that also means
>> minus 200v.  The Collins has -170vdc on its connector.  I was thinking 
>> the
>> K3 uses relay contacts for the 'key out', but maybe not.  Second question 
>> is
>> whether the K3 schematics are available?
>>
>>
>>
>> The powerful configurability of the K3 means I have a learning curve to 
>> go
>> thru.  I think this reflector will be a big help.  Searching the archives
>> will probably solve a lot of questions and then there is the 'live'
>> community.  Very good.  I also subscribed to the yahoo group.
>>
>>
>>
>> 73s Doug N8VY
>>
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>
> -- 
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco/
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