PSR-400 discriminator tap?

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n7qob

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Does anyone have accurate information on where to obtain discriminator audio on a GRE PSR-400. I have seen information that it may be either TP3 or TP4, but haven't confirmed either. Specifically looking for anyone who has either done and confirmed this, or has confirmed on a schematic.

Thanks in advance.
 

detroit780

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Psr 400

The PSR 400 is the same radio as the Radio Shack Pro-163 searching here on RR I found this

http://forums.radioreference.com/radio-shack-scanners/120315-pro-163-mods.html

TP-4 is the usual test point on GRE radios for the discriminator



Does anyone have accurate information on where to obtain discriminator audio on a GRE PSR-400. I have seen information that it may be either TP3 or TP4, but haven't confirmed either. Specifically looking for anyone who has either done and confirmed this, or has confirmed on a schematic.

Thanks in advance.
 

n7qob

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Thanks, I had run across the same thread as well, however a recent message from GRE support indicated that discriminator audio could be found on TP3. I'll have to do some tracing on the board from the TP to the Discriminator IC and cross reference the pin out once I have a radio in hand. I'll post my confirmed findings as well.
 
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