[hpsdr] Broken Penelope

[Darrell Basinger]

I have two Penelope exciters (1 x TAPR & 1 x Gerd / DJ8AY). Initially both worked fine (.5W output). However, both have recently failed (first one then the second) with an output of only 50 mW. Only 3 of 5 leds are on.

 

I have two sets of Alex, LPU, Mercury and OZY. The same low output from Penelope is evident using either set.

 

Following the troubleshooting guide on the Penelope Wiki, I measured 300 mV at pin 2 of JP3. If I remover the jumper I measure 600 mV. The VFWD voltage (pin 7 of UB9) measures 1.25 Vdc. Is this dc level too high resulting in the FPGA code to reduce the output? In other words, could the low output power be the result of a feedback condition (related to U9 or U7) causing the power to roll back?   



I would truly appreciate any suggestions.

 

Darrell, WW4F   
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