Re: struggling with gMFSK setup

[brownh@xxxxxxxxxxxxxxxx (Haines Brown)]

Again, I must thank you for your patient and thorough attention to my
question. You really have illuminated things nicely.

> > Now the PTT LED on my SignaLink goes on as it should. Not
> > tried it on the air yet, but about to do so.
> 
> Excellent!  I'm glad that it all sorted out in the end.

Today, because I fiddled with soundcard mixer settings, my soundcard
does not function at all, even to play a simple sound file, so I'm
back to scratch, but at least I know what to do once I get my card to
word again.

> Something you could check, in the manual (I don't have a copy
> here) is whether Yaesu states any cautions about full-
> power operation in RTTY mode, or extended full-power key-down
> testing.  If so, honor the cautions - they'd apply to PSK31
> as well.  If not, then the chances are (I think) that the
> 817's heat dissipation capability is adequate for this.

The FT-817 manual says nothing about limiting power for digital
modes. So apparently it's safe to run a full 5-watts, but based on
what you say about IMD, 2.5 would be a good idea.

> When the band's not propagating well, you can't work from here
> to anywhere outside of ground-wave distance with a kilowatt 
> and a six-element beam :-)

Which brings up another naive question. On 20-meters, communications
principally rely on F2 layer skip, and that means I can hear stations
from about 500 miles to several throusand miles away. That's great,
but it would also be nice to communicate with folks in my own state
(within 100 miles) by PSK31. Is there any ground wave communication?

Haines Brown KB1GRM 
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