Worked OK, turned it off. Next day it turned on but no Receive. It
belongs to my friend so I brought it home to troubleshoot. What I know is:
1. It was intermittently working when it was turned on--sometimes the
display did not light up, other LEDs were On randomly....I found that the
N4PY chip was probably the problem after reading the book. I put the
original chip back in and it turns On nicely. good display, etc. (A
replacement N4PY chip is coming).
2. The radio transmits OK; power out and SSB all seem good
3. I tested the TRX-RX switch with Ohmmeter and it is switching OK
4. In RX Ant I get much stronger signal through the radio than in the TRX
Ant
connector on Receive. On 14MHz the signal drops into the noise at about 20
microvolts in the RX input. Even with S-meter well over S-9 (+30) with the
RX
input, I can hear it S1 or so through the TRX input.
So the receiver is pretty deaf with the RX input and unusable with the TRX
input.
5. The Attenuator works with the receive signals
6. I have tried 80M and 20M so its not band dependent
7. Measured voltages and they are correct
I suspect that my friend turned the radio Off and On by leaving the OMNI V
"On" and switching the Power Supply (Book says don't do this). I'm
guessing a transient took out the microprocessor, and caused the RX problem.
Any help or ideas will be greatly appreciated.
73
Wes
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|