Well, I ordered the XG2 in the hopes that it would help me signal
trace the receiver in order to find the cause of
low power and hi current on transmit.
Looks like that was a mistake. Turns out I need a stronger signal
than 50 uV.
Some might recall that I recently had to replace R50 (1.5 ohm 1/2
watt) which I just did.
So, as it stands, I get reasonable values for PLL Reference
Oscillilator and VCO (from page 10 of troubleshooting):
Ref Osc Output is .826Vrms,
VCO output is .307 Vrms,
VCO buffer Output is .654 Vrms
BFO Output is .592 Vrms
Cal FCTR reads 000000 with no probe connected
BFO Buffer Output is .05 Vrms
I believe the above are all normal values.
So far, so good
Now, when I get to Low Pass Filter, Bandpass Filter and T-R, it all
goes South.
Low Pass Output is .01
T-R Switch #1 is .03
Bandpass Filter is .006
T-R #2 is .009
All are quite variable, usually starting higher and sliding down.
Are these low values due to not having a sufficiently strong signal?
Or are they indicating one of several sources of my problems?
Can't say this is fun but I feel I AM learning.
John
AB8WH
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
