[600MRG] WD2XSH/38 on the air

[Brian Pease]

This is the first time I actually decoded QRSS.  For now, my setup uses 
an HP3586C receiver, but with Spectran connected directly to the 15625Hz 
IF output, which I ran to the back panel.  At the low signal levels we 
have, the IF output is linear without AGC, and the center frequency is 
exact.  I can receive anywhere in the band with the receiver set to 
475kHz.  This avoids the receiver's BFO, which uses separate crystals 
not linked to the synthesizer.  Spectran can just handle the 15625Hz, 
giving a minimum BW of 0.17Hz.  It is nice to have a frequency check as 
I plan to use the tracking output of the receiver to drive my amplifier.
I wish the WSPR software would work on 15kHz.............................
On 6/7/2013 10:42 AM, John Collins wrote:
>
> Brian, Thanks for the report from up there in Milton, and good catch on the
> frequency!  The time base in my counter actually slipped a little and I
> adjusted the DDS vfo using it.  After your report, I checked it with my
> bench counter it was on 475.308 just as you measured.  This is what happens
> when the shack sits idle for a couple of months.
>
> 73, John
>
>