09-09-2012, 10:54 PM
TA, if you cruise up a little on the thread, you can see it on the scope. Also a little of my diagnosis of location by shorting out control grids of the RF amp and the 1st detector. It is coming somewhere in between those tubes. Oscillator is in the area as well. I show a picture of it as well on my scope. As indicated, there are only two "mica" sealed caps in the area, both in the oscillator section. There are a few more pf value caps in the area as well and are listed as "compensator caps". Basically compression mica trimmers with the adjustments sealed. One is shown on the bottom of the detector coil I sent off to Ron in pictures on this thread.
The noise is hard for me to hear but can really see it on the scope, what I hear is basically distortion on a station playing. Off station or with the antenna shorted out, yep, loud popping static. What people with good hearing hear is enough for them to cover their ears. Never had a radio with SMD as I don't work on anything that new, but from what people describe I would guess it sounds like that.
Of course, maybe it was coming from the detector transformer arcing. Won't know till I get it back from Ron and see what happens. Just trying to think ahead.
Thanks for looking and ideas. Jerry
The noise is hard for me to hear but can really see it on the scope, what I hear is basically distortion on a station playing. Off station or with the antenna shorted out, yep, loud popping static. What people with good hearing hear is enough for them to cover their ears. Never had a radio with SMD as I don't work on anything that new, but from what people describe I would guess it sounds like that.
Of course, maybe it was coming from the detector transformer arcing. Won't know till I get it back from Ron and see what happens. Just trying to think ahead.
Thanks for looking and ideas. Jerry
A friend in need is a pest! Bill Slee ca 1970.
