Aaron Walton

"Beer is proof that God loves us and wants us to be happy." --Benjamin Franklin

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Silvertone Model 9054 (Sears)

Silvertone Model 9054 (Sears)
Bought September 4, 2015

20150907-194441


September 6
I plugged it in on September 7th and as it warmed up sounds of crackling began to come out of the speaker. The volume was on low so I think I should have heard nothing. Then it started to snap louder kind of randomly, I noticed that the Rectifier tube, 7Y4 was sparking and arcing at the bottom of the tube, I immediately turned the radio off and unplugged it. I remember a similar thing said to be happening on a tube amplifier that the dude from Mr. Carlson’s Lab fixed so I will have to re-watch that to see if I can figure out if it’s the same thing.

He said it was due to a short to Ground, most likely due to a bad capacitor, I should have expected that. There are 3 electrolytic caps, one 20ufd and two 40ufd.

September 8
I got the ohm meter out and tried to see if any of the Electrolytic capacitors were shorted to ground, nope. I then removed the chassis and began cleaning up the tubes and getting rid of the dust. There are a BUNCH of foil capacitors that need to be removed and replaced. I then noticed that the 7Y4 Rectifier tube was instead a 5AZ4 tube, not even the right pin-out. Will have to determine if someone had changed things so it will work or if it is just FUCKED up. I also noticed that a cap was disconnected between the output and the Detector (7C5) which is now a 7B5.

20150908-214239


20150908-231715

Country: United States of America (USA)
Manufacturer / Brand: Sears, Roebuck & Co.; Chicago (IL)
Brand:Silvertone
Year: 1948–1950 perfect model Type: Broadcast Receiver – or past WW2 Tuner
Valves / Tubes 6: 7H7 7Q7 7A7 7C6 7C5 7Y4
Principle Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast plus more than 2 Short Wave bands.
Details

Power type and voltage Alternating Current supply (AC) / 110, 125, 145, 200, 245 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm
Power out 3 W (unknown quality)
from Radiomuseum.org Model: Silvertone 9054 Ch= 101.849 – Sears, Roebuck & Co.; Chicago
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 17.25 x 13 x 10.75 inch / 438 x 330 x 273 mm

Notes:

  • Band A 535-1650KHz Band B: 1.65-4,6MHz Band C 4.6-10MHz Band D 10-15MHz Band E 15.6-22.1MHz.
  • The price in the Sears Catalog #200 is only $ 49.95.
  • Price in first year of sale 94.50 $
    • About Me

      A Beer loving Electrical Engineer turned Software Engineer
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