[MRCA] mystery diode
Ray Fantini
RAFANTINI at salisbury.edu
Sun Sep 14 21:04:08 EDT 2025
Ok, so I have a very early AN/PRC-74 on the bench that has a shorted PD9047 diode (CR-15) that's used to develop the voltage for the tuning meter. the dam thing is very small and somehow don't think a 1N34 will take its place.
AI tells me that's a way obsolete part number and beyond its ability to come up with a replacement, anyone have any ideas? the tuning meter is somewhat important on the 74
This particular radio is serial number 606 and the PA deck is serial number 8! has strong output and in all other ways good.
you can see the circuit on page 186, figure 7-11 in the manual.
Ray F/KA3EKH
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