01-14-2016, 05:16 PM
Next I recapped it including unmounting the RF unit so I could really get down in there.
[Image: https://farm2.staticflickr.com/1580/2346...8e21_z.jpg]
Replaced all the rubber mounts while I was at it.
[Image: https://farm6.staticflickr.com/5829/2398...05a9_z.jpg]
All the bakelite and electrolytic caps were restuffed.
[Image: https://farm2.staticflickr.com/1673/2359...0d36_z.jpg]
[Image: https://farm2.staticflickr.com/1704/2419...59a8_z.jpg]
I also discovered the 2M volume control had been replaced with a 500K and the tone/power switch replaced with a potentiometer and switch. I got replacements from playthings of the past and restored the original wiring.
[Image: https://farm2.staticflickr.com/1557/2427...55e5_z.jpg]
[Image: https://farm2.staticflickr.com/1619/2430...54c0_z.jpg]
The radio played great on the first power up Plenty of volume and selectivity. However, the "magnetic tuning" feature doesn't seem to be working.
[Image: https://farm2.staticflickr.com/1576/2406...87f8_z.jpg]
Turning it on and off has almost no effect on the tuning. It certainly isn't locking in on a station. I did some voltage checks and found the 6N7 oscillator control tube only has around 180 volts on the plates. The service info states 260. That voltage is derived from the junction of the 10K and 15K in a bleeder network of 10K, 15K and 51K.
[Image: https://farm2.staticflickr.com/1580/2346...8e21_z.jpg]
Replaced all the rubber mounts while I was at it.
[Image: https://farm6.staticflickr.com/5829/2398...05a9_z.jpg]
All the bakelite and electrolytic caps were restuffed.
[Image: https://farm2.staticflickr.com/1673/2359...0d36_z.jpg]
[Image: https://farm2.staticflickr.com/1704/2419...59a8_z.jpg]
I also discovered the 2M volume control had been replaced with a 500K and the tone/power switch replaced with a potentiometer and switch. I got replacements from playthings of the past and restored the original wiring.
[Image: https://farm2.staticflickr.com/1557/2427...55e5_z.jpg]
[Image: https://farm2.staticflickr.com/1619/2430...54c0_z.jpg]
The radio played great on the first power up Plenty of volume and selectivity. However, the "magnetic tuning" feature doesn't seem to be working.
[Image: https://farm2.staticflickr.com/1576/2406...87f8_z.jpg]
Turning it on and off has almost no effect on the tuning. It certainly isn't locking in on a station. I did some voltage checks and found the 6N7 oscillator control tube only has around 180 volts on the plates. The service info states 260. That voltage is derived from the junction of the 10K and 15K in a bleeder network of 10K, 15K and 51K.
