[Elecraft] K2 relay circuit?

[Don Wilhelm]

You can order an Amp Keying partial kit from Elecraft for $5 - look for
AMPKEYKIT at the Elecraft order page.  The direct link to the circuit and
other details is  http://www.elecraft.com/Apps/Amp_keying_ckt.htm - no
circuit boards are available, but it is easy to buiild on a piece of
perfboard.

If you want something a bit more recent, go to Tom Hammond's website
www.n0ss.net and look about 3/4 of the way down the page for 'K2 (BASIC)
External T-R Relay Driver'.

The KPA100 does have the Amp Keying for an external linear built into it.

73,
Don W3FPR

> -----Original Message-----
>
> Does any have a switching circuit for a K2 that will activate the
> relay in an amplifier? My 11-year-old Kenwood is in for a repair,
> and it may be a while before it's back in the shack. In the
> meantime, I'm driving an Ameritron ALS-500M solid state amplifier
> with 7 watts from my K2.
> That works well but requires me to key the amp relay (I use a
> pushbutton on a cord) as I key the K2 with the mic's PTT switch.
> The voltage on the amp keying line is 10 V DC, and the current
> when keying the amp is 120 mah.
> Dave, W6KOW
> K2 # 5120. Sometime in the six few months I'll build the K2
> 100-watt internal amp.