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Hey, Andy. You were saying "By your readings- you do not have any signal on pin5 IC1- Which kills s meter and any AGC " I did post that I have approx. 1v at Pin 5 IC1 but only when I was injecting a S-9 signal into the antenna jack with my generator. In RX (idle) there is no signal. The service...
Did some resistor readings around IC1.
Found quite a difference in resistance readings compared to the schematic
SCHEMO.........................ACTUAL
R41-100k............................ R41-47K
R42- 100k............................R42-51.7k
R36-100k.............................R36- 72.8k...
Well, it doesn't look like I'm getting anywhere with this.
D12 is ok
VR1 is ok
Pin Diodes D10,D11 are ok
Tried jumping D11- nothing happened
C32 was replaced
D8 ok
D9 ok
PIN diodes D23,D24 are ok
Replaced C71
IC1 Replaced
Rx side of L6 is good all the way to the detectors.
I did find a problem...
Thank you, gentleman. I was trying to find one of those circuit descriptions encompassing IC1 which controls the AGC and S/RF circuit functions leading to the meter movement. What you both supplied should get me thru this.
This is a AM radio. No TR13 or 14. If I remember correctly, TR13 has a jumper and TR14 is unpopulated. I'm seeing the voltage increases with AGC at IC1 but still no meter deflection with a signal generator at the antenna jack.
I have a connex cx-3300HP that receives fine but does not measure any signal on my s meter. The s meter works fine in transmit. I have proper voltages on IC 1. My RF gain is working. D12 is fine. PIN diodes are fine. This thing has me stumped. Any assistance would be much appreciated....and...
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