Bob:
Yes, there is a potential destruction of your final tubes and harmonic
radiation if the Plate Load circuit is not properly resonated/tuned.
Detunning of the Grid is just as dangerous to the rig.
Setup should be accomplished w/o VOX; use PTT or MOX when setting the
audio levels.
Does your home brewed interface include a voltage divider for the snd
crd audio level? A 100 to 1 ratio is probably best. The microphone
input stage in a radio is expecting in the order of 200 millivolts. Snd
crds put out a much higher level. Run PSK w/o ALC deflection. Do not
use a speech compressor with any snd crd mode. No Clarifier / RIT,
also.
Good luck.
73 de ~ Vince ~
WA2RSX IOTA NA-026
bob plourde wrote:
>
> I have an F101ZD dedicated to PSK31. Using a home brew interface and
> VOX I find no combination of mike gain and sound card volume that will
> produce a consistent output of 30W. I get either zero or the full
> 100W. The only solution is to detune the load control a bit so max
> power is <40W and then raise the mike or sound card levels. My question
> here is there a potential problem with running the rig a bit out of
> tune.
>
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