[ARC5] AN/GRC-109 antenna clamping diodes CR1, CR2

[Fuqua, William]

  I was testing the GRC-109 and found that the TR switch in the transmitter was not passing any signal.

I suspect CR1 and CR2 HD2172 diodes are bad. What would be a good substitution for these? I can't find any data on them.

The receiver works well down to less than a uV on CW with the signal applied directly to the antenna terminals.

73

Bill wa4lav

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