Re: RCA AR88D Comms Receiver.
More news on the slugs.
I am more sure now that moisture has somethig to do with it.
I baked the 4, 5, & 6 slugs in the oven over night, low heat, and the 4 slug tunes the 4 coil ok. The 5 slug would tune but the scale alignment would not come in.
I used Bob's slug for the 5 coil and it is ok.
So I thought lets give one a bit more heat with a blowtorch, no good, wrecked it.
So did the oven heat for to long or to short?
I have made some measurements on band 5 16.40mc/s with my super more modern, very expensive, National sig gen, VP8177A.
If the attenuator can be believed I get a signal to noise ratio of 10dB with an input of -10dB below 1uv, with no mod I get 15mv noise at the det.
There is a bit of mismatch as the o/p of the gen is 50ohms terminated and input to the set with one side earthed.
Has anyone made any sensitivity measurements on an AR88 to come anywhere near to the published spec?
There is a guy on ebay selling parts for an AR88L. He is selling a set of 8 IF coils for this model. Can any one tell me if the coils for the 2 models are the same part numbers? I have the part numbers for the AR88D model.
John.
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