1960 Curtis Mathes Television 1121, 2121, 3121A, 5521A

I purchased this set around Christmas of 2018 for $2.50. As you can see below the socket was broken off of the picture tube. The set was also dirty.

Below you can see before and after of the RF section of the TV. Notice all the black capacitors in the first photo.

Below is the power supply section.

Here is the tv back working again.

Comments

Bell & Howell Oscilloscope Model 34 DeVry Tech

The Bell & Howell Oscilloscope Model 34 was purchased at an auction and then give to me. It was made by Heathkit for DeVry Tech (DeVry University). Below is a photo of the front after I finished electronically going through it. There was nothing interesting that came up while working on it. Below you can see some before and after of the underside. Below is the top side. The 2 filter cans were 4 sections of 20mfd for a total of eight 20mfd capacitors. Below is the solution I came up with to replace them. It consists of eight 22 mfd on a PCB that is zipped tied to the bottom of the chassis. Overall this is a simple oscilloscope and was a simple electronic restore. Here is the schematic.

O.M.G.S Japanese AA5 Radio

O.M.G.S Japanese AA5 Radio It does work. The electrical work was done prior to me purchasing the radio.

Robyn T-123B

I picked up this radio at a local flea market. It was in fair shape and dirty. The radio smells like cigarette smoke as it heats up. Below you can see what the top side looks like. I changed all electrolytic and fil m capacitors. Below is the underside before I change capaitors. Here is a photo after: The only issue this radio had was an open 33k ohm resistor coming off the meter adjust pot. The symptoms were the meter seeing a constant 7 volts across it and a lower screen voltage on the first IF amplifier. Once the resistor was replaced the voltage went away and the screen grid voltage went back to normal. Cleaned up face.

Cody's Microcosm

Search This Blog