[Drakelist] New R4C owner

[Alan Ibbetson]

I am new to this list so please bear with me. I have a pristine-looking 
R4C S/N 23247 and I'm trying to decide whether its overall gain is up to 
scratch. The manual doesn't appear to give a specification in terms of 
how many microvolts at the antenna input for how much audio output or 
how much input for the onset of AGC or for a given AGC voltage or 
anything along those lines. It can (just) hear 0.1uV PD on 10M, so the 
front end seems fine, but that test doesn't say anything about overall gain.


I will have some questions about S-meter settings, but I'll leave those 
for later.


Please can you folks give me some idea of how you check overall receiver 
gain and the sort of results I should expect.


73, Alan G3XAQ
--

Alan Ibbetson
a...@g3xaq.net

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[Drakelist] R4C overall gain specification

[Alan Ibbetson]

I have the data I was seeking on R4C overall gain, thanks to Steve Wedge 
W1ES/4. The original 1974 QST review gives it as 0.1uV or less for 10dB 
S+N/N. Although my receiver can detect a 0.1uV signal it's well short of 
that amount of audio output, so it looks like I have some work to do to 
find a bit more gain.


--

Alan Ibbetson
a...@g3xaq.net

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