[Elecraft] Need a PTT from my K2/100.

[jerry]

The PTT output is an RCA jack next to the power connection.  There is an 
internal
MOSFET that pulls it to ground on transmit.  It can sink up to 1A, and 
tolerate up to
200V.   It can only switch POSITIVE relay voltage.  So if you have an 
old tube amp
that has a negative bias/relay voltage - like, say, a 30L-1, you'd have 
to put some sort
of intermediate relay or switch.

                     - Jerry KF6VB



On 2021-10-16 10:01, John Regner wrote:
> I just purchased a new amp (HLA 305) and began hooking up amp. Read the
> instructions in the manual and it stated that if there was no PTT, to
> change the VOX setting to "on" which I did. I attempted to TX and there 
> is
> no response from the amp. I called DX Engineering and was told that the 
> PTT
> must be used to trigger the amp.
> OK - so where does one find the PTT from a K2/100?
> John N2AQR
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