Hello Joe,
I think also that the condx was not very good, and OP8 had
not good decodes here, only 2 during the night but better than -30 dB. I got
some other good Spectran traces for your 8 minutes TX, but no OPERA decode,
strange !
Using OPERA for receiving I get many software false decode,
perhaps x 100 times more than WSPR...
On the way, I copy your signal on 478 477,05 Hz +/- .01 Hz
and perfetly stable. I’ll be rxing OP8 again to night.
@++ Andy F6CNI
-----Message d'origine-----
Sent: Tuesday, November 11, 2014 7:28 PM
Subject: Re: LF: OP8 on 478.477 kHz
Hi Graham,
It seems like poorer condx but it could
be TX trouble too. There's
a sharp spike & ringing on the
leading edge of the square wave as
it goes from the 4427 to the hexfet gate.
Putting more uF across
the Vdd of the 4427 didn't help and there
is still hissing unless
one stands on the left foot with one's
hand in the pocket.
RF is fascinating.
Let's have another go tonight. Oh
by the way, am I on frequency?
I miss the accurate QRG reports of
Markus' OPDS.
73
Joe
