[Elecraft] RS232 polling noise with MicroHAM CW Keyer

[Don Wilhelm]

Alan,

I don't have a cure, but you may be able to reduce the level significantly
(S-5 sounds a LOT higher than the usual complaints).  Remove the right side
cover from the K2/100 and tuck the ribbon cable up near the top of the
control panel and the front of the KPA100 - do the same with the speaker
cable.

The IF amplifier IC is on the RF Board just below the ribbon cable location
and if the cable is dangling near the RF Board, some pickup of the digital
'noise' is possible, so locate the cable as far from the RF Board as
possible.

73,
Don W3FPR

> -----Original Message-----
>
> My newer laptop does not have a serial port and doesn't run DOS so I got
> a MicroHAM CW Keyer. It works fine with my FT1000MP Mk5, but with my
> K2/100 I get significant noise (like, S5 on the meter) on all bands
> whenever the MicroHAM is polling the K2 RS232 for VFO/Mode data.
>
> Has anyone else seen this problem? MicroHAM support says it's a known
> problem with the K2 (?) and suggested asking on this list whether there
> are any known fixes.
> --
>