[Elecraft] XVRT sequencing

[Evert Bakker (PA2KW)]

Hello to all,

I'm at the stage of inserting my K2 into the VHF setup. I've been using a
Ten-Tec Paragon for the last 18 years as the IF stage for my 2 mtr station.
The Ten-Tec has two connectors at the back (RCA?) with the function "TX-OUT"
and "TX-EN". In normal standalone operation a bridge is plugged in. When
using amps, and in my case a XVRT - PA - HF Relay, the TX-OUT is a request
for transmit (initiated by the internal combination of the PTT, key(er) or
tune button. I use this signal in my sequencer to sequentially switch the
final HF-relay - switch the PA in TX mode - and switch the XVRT in TX mode
after a defined time delay. When this procedure is accomplished I give an
enable (TX-EN) signal to the Ten-Tec to switch over in TX mode. This
procedure enables absolute power-free switching. (I never blew any relays,
amps and preamps in the last 18 years of intensive use).
To make use of my sequencer again, I was looking for this function in the
K2. Unfortunately I could not find this closed loop procedure.

Of course I can short circuit the "XVRT-OUT" plug (after a 10 dB pad) from
the K60XV module to prevent RF injection into my XVRT. I just don't like
this type of solution.

I saw an RX 8V signal on the DB9 / RS232 connector (included in the KPA100
option, which I bought but not installed yet), but this signal is not the
one I can use as described in my above story.

Is there anyone out there who made some changes in the K2 which gives
similar sequence procedures as with the Ten-Tec?

Thanks in advance.

Evert, PA2KW
K2: #4836