[CQ-Contest] Voice memory keyers

[jukka.klemola at nokia.com]

...
> earlier MFJ voice keyer. No matter how many caps and ferrite 
> cores we add we
> still get some interference. If we add a filter we may clean 
> up one band
> then cause problems on another band.
> Is there a recommended voice keyer that the multis have had success?
> Tnx
> N2TK, Tony

My suggestion is to ground the MFJ better.
I use a short, like about 20cm or 8 inch long ground wire between
MFJ and the radio it is connected to.
Minus side is the placing of the keyer is naturally limited.

I use a external, linear (with transformer) power source for the
voice keyer.

No ferrites needed.
Works fine, no RFI.


73,
Jukka OH6LI / OH4A / OH0V