[Elecraft] Using Elecraft KPA-1500 for 2 radios

[Jim Brown]

Nope. The key inputs of both amps are buffered.  Partial schematic of 
Titan is here.

http://k9yc.com/TitanKeyingLogic.pdf

K4XU once told me that it was his initials on the published schematics, 
and I think he later worked for Alpha.  For operation with most rigs, 
the PTT position of the PTT/KEY switch is used for all modes. The QSK 
position is for a keying method used by early Ten Tec rigs where the 
operator keys the amp and the amp keys the rig.

73, Jim

On 3/17/2019 5:56 PM, john at kk9a.com wrote:
> So the different voltage sources from each amp do not bother each other when
> connected together with a Y or was only one amp turned on at a time?
>
> John KK9A
>
>
> Jim Brown K9YC wrote:
>
> <snip>
>
> Most of the rigs I've owned use a short on the key line to key the amp.
> If both of yours do that, you can probably connect them in parallel to
> the Key input of the power amp using an RCA Y-cable. I've done that for
> years to switch my K3 between my KPA500 and a 1500w tube amp (for many
> years a Ten Tec Titan, now an 87A).
>
> 73, Jim K9YC
>
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