Have you performed the alignment procedure?
Do you have a SG?
You need to try to align, and if it does not, see if there is an open RF coil somewhere.
You need to put a signal through, from Antenna to the Speaker.
Noise/static is good. It means your tubes are mostly OK, your power/filters are OK.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
I picked up the same set a yr or so ago but it was the am/fm model and it was missing a chunk out of it's side. It was on the table that said FREE and it was 3:00am so I didn't give a good going over. It also came w/a model 84 which was a mouse house but had a good spkr...
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Yes I have a rf signal generator and it also has an audio generator.
Tried the alignment procedure but could not get any signal after the first step. i then noticed that there are trouble shooting procedures for the radio as per attached. section 1 measuring voltage checked out
section2 revealed no signal . I checked the resisters since the caps and tubes are good and R203 reads 586 K verses the parts list of 470 K and R204 read 233K vs 130 ohms Its gets weirder .The next step for section 3 shows in figure 3 C307 (.05mf) connecting from pin 5 on the 50 A5 to pin 3 on the 7b7 it does not show this on the schemo. the current wiring is pin 2 of the 50 with a .02 mf connected to pin 5 of the 7b7.
I am very carful when replacing caps .I don't remove the old leads from the pin entirely. I cut the lead from the old cap and connect to that lead so i dont wire to the wrong pin. What controls the figure 3 or the schemo?
I'm surprised that if the cathode resistor on the 50a5 measures 233K that you would have any audio at all. Do you have the proper voltages coming from the power supply (110vdc & 92vdc) more or less?
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Ok so if you measure the dc voltage from the cathode of the 50A5 (+) and B- to the negative meter lead. Should see about 6vdc there if the resistor is 130 ohms. If it's 233K it's going to be a whole lot more like 30 or 40v. This will cause the tube not to conduct. Replace w/a 1 or 2 w replacement.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
I rechecked the BC & Sw oscillator more carefully with a magnifying glass. Sure enough one of the hair thin wires to one of the posts was disconnected I reconnected and now get two to three AM stations which isn't too bad since i am in a basement with no exterior antenna. Additionally i checked R203 ,650 k vs 470 k on schemo R204 was 257vs 130 on schemo . I replaced both and reception is much better . Still trying to realign but cant get alignment signals to the radio.
You have been tremendously helpful to this newbie !
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