K2 and TenTec Titan and Logikey -- interface question

[K. Rice]

I want to use my old TenTec Titan amp with K2 #4314 for nets where
I am often having to get a relay working at QRP levels.

Is there any reason not to use an outboard keyer (older Idiom K-3)
to key the Titan via its KEY IN jack and then use the TenTec's KEY OUT
jack to key the K2 via the K2's key jack with InP = HAnd?

Likewise how about SSB with an outboard PTT switch keying the
amp which subsequently keys the K2's PTT/dot line by the same method?

As always, thanks to this amazingly competent netgroup.

73
Ken Rice
K3VV
Coopersburg, PA

 


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[Vic K2VCO]

K. Rice wrote:

> Is there any reason not to use an outboard keyer (older Idiom K-3)
> to key the Titan via its KEY IN jack and then use the TenTec's KEY OUT
> jack to key the K2 via the K2's key jack with InP = HAnd?

You can certainly do this, or you can add an amplifier keying circuit
(see <http://www.elecraft.com/Apps/Amp_keying_ckt.htm>) to your QRP K2
and have the K2 key the amplifier directly.  The amp key circuit is
based on the 8r line which keys the amp 10-15ms before RF appears, and
can be adjusted for a desired hold time afterwards.  Then you can use
either the internal keyer or the Logikey.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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