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

[Tom Lee]

Hi Bill,

That's a Hughes part number, germanium (I believe). Specs are 60V 
breakdown, 200mA max forward current. A 1N34A would be a close sub. 
Where in the circuit are these diodes? That would provide a clue as to 
whether the 1N34A makes sense.

--Cheers,
Tom

-- 
Prof. Thomas H. Lee
Allen Bldg., CIS-205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu

On 2/18/2019 10:03 PM, Fuqua, William wrote:
>
>   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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