[Elecraft] slow amp relays

[Wayne Burdick]

Vic Rosenthal wrote:

> The AL800H uses an open-frame t/r relay whose pull-in time is just too
> slow.  You can replace the relay with a reed relay for input and a
> vaccuum relay for output (see <http://www.somis.org/QSK922.html>) and
> the amp will be fast enough for full QSK if you wish.  Ameritron also
> makes an (expensive) PIN-diode QSK unit, but the vaccuum relay system is
> effective and cheap.  The 8r hold function will keep the relay closed
> during characters and prevent hot-switching when it opens, but obviously
> can't anticipate your sending!

Vic,

Just how slow is it? I'd like to attempt to add a bit of preventative logic to
the KPA100's firmware so that the KPA100 can handle this situation without
instantly shutting down.

tnx
Wayne
N6KR