[Elecraft] new subscriber and first question

[Greg]

Suggest you use one of those amp keyer interfaces for this amp.  As an
option, also look at the universal keying adapter from HamGadgets.com.

http://www.hamgadgets.com/index.php?main_page=product_info&cPath=21&products_id=128&zenid=r3o0i7qb2ikjcqj299lq3pudb2

73
Greg
AB7R


On 9/3/13, Vic K2VCO <k2vco.vic at gmail.com> wrote:
> 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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