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ID: hamfest find DDS-DRIVEN SYNTHESIZER 10 MHz
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wd5jfr:
On one data sheet the PIC was introduced in 1998.  I've searched QST, QEX, Nuts & Volts for the PIC and S&S Engineering and no luck. QRP search next. Thanks for everyones efforts and responses.
wd5jfr:
Not much luck in finding anything on QRP sites except on eham.net reviews of 2 QRP rig made  by S&S Engineering about  yr 2000. I've tried many different REF frequencies from 500 KHz to 500 MHz and I get outputs from low KHz to about 100MHz but there is no linear response to tuning as frequency output jumps in large steps showing up to 9 digits.  I'm unsure of what its' application is  I but I assume it's a VFO that requires a REF standard frequency.   There are 2 recessed push buttons PRG & SET that change what's displayed but I can't make sense of  any programming sequence. Toggle SET 1 seems to be active but  toggle SET 2 is inactive.  I'm guessing that the REF input must correct and I've had no luck with shot gunning.  Here's as list of different SET displays.
TUNE UP (FORWRD)
TUNE DN (BAKWRD)
O/S NBR X.  X can be from 0 to 9. changed by FREQ SET knob
??.? ? ? ? ? ? DIALFR
??.? ? ? ? ? ? VFO FR
+100 PPM CAL ADJ  controlled by FREQ SET knob from + or - 999
I'm coming to the conclusion that unless I find some documentation I've wasted a bunch of time and at 82 I don't have good trial & error luck.
tautech:

--- Quote from: wd5jfr on October 14, 2023, 11:42:09 pm ---I type six question marks and automatically they changed to faces??  Edit didn't help.  Sorry

--- End quote ---
Space them so to not be auto converted to the Huh? emoji.
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