[Elecraft] TL-922

[Ken Winterling]

Be careful with the TL-922. An unmodified TL-922 has about 100VDC on the
keying line. I'm not familiar with the K3 so I don't know if its keying
circuit can handle that voltage/current.

I would check the K3 manual for its keying circuit specifications and also
measure the TL-922 keying line voltage. You may need a keying line buffer
(small relay or solid state high voltage transistor) between the K3 and the
amp.

*Ken*
*WA2LBI*




On Wed, Mar 29, 2023 at 4:05 AM Jim Brown <jim at audiosystemsgroup.com> wrote:

> On 3/29/2023 12:02 AM, Josep Torres via Elecraft wrote:
> > Have a couple of Kenwood TL-922’s around and was thinking to connect one
> to a K3.
>
> Hi Josep,
>
> I don't know that amp, but I've got K3s that I've used with both
> Elecraft and non-Elecraft amps -- three different Ten Tec models, an
> ACOM, and an Expert. In all cases, it was a matter of figuring out what
> pin on what connector puts the amp in TX mode, and using the Power
> setting on the K3 to set drive level. For all of those amps, a simple
> through cable from the K3 Key Out jack to the amp Key In worked. In
> general, the manuals for both K3 and the amps are our friend.
>
> You've got a great station -- I'm near San Francisco, and we've worked
> on CW on 160, 80, and 10! Not an easy path.
>
> 73, Jim K9YC
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to wa2lbi at gmail.com