08-13-2018, 05:03 PM
OK, so I finished re-capping, replaced out of tolerance resistors, and checked most of the crucial transformers and coils, and did a power-up. No sparks or explosions .
BUT, it is completely deaf. No static, no reception.
I flipped the chassis over, and started taking voltage readings. Here is what came up:
6K7G:
H: 6.5v
P: 251v/240v
S: 90v/100v
6J5G:
No voltages indicated other than the heater voltage, which checked out at 6.5v
6K5G:
P: 187v/170v
H:6.7v
Here's where I suspect there's an issue. If anyone can give me a clue of where to start looking, I'd appreciate the help.
6A8G:
H: 6.6v
OscP: 113v/180v
P: 141v/180v
S: 78v/100v
I thought the audio cut-off switch on the dial might be corroded, so it was cleaned, and SEEMS to be working, but this type of dial/switch mechanism is new to me. If there's anything I need to clean or check, again, I'd appreciate any tips.
Note: I am getting audio. There is a very low hum coming from the speaker, and touching the grid cap of the 6K5G (1st audio) tube does produce a loud buzz.
Here's a couple pages of paperwork for easy reference:
[Image: https://farm2.staticflickr.com/1835/3015...d8e7_z.jpg]
[Image: https://farm1.staticflickr.com/939/44020...4e60_z.jpg]
BUT, it is completely deaf. No static, no reception.
I flipped the chassis over, and started taking voltage readings. Here is what came up:
6K7G:
H: 6.5v
P: 251v/240v
S: 90v/100v
6J5G:
No voltages indicated other than the heater voltage, which checked out at 6.5v
6K5G:
P: 187v/170v
H:6.7v
Here's where I suspect there's an issue. If anyone can give me a clue of where to start looking, I'd appreciate the help.
6A8G:
H: 6.6v
OscP: 113v/180v
P: 141v/180v
S: 78v/100v
I thought the audio cut-off switch on the dial might be corroded, so it was cleaned, and SEEMS to be working, but this type of dial/switch mechanism is new to me. If there's anything I need to clean or check, again, I'd appreciate any tips.
Note: I am getting audio. There is a very low hum coming from the speaker, and touching the grid cap of the 6K5G (1st audio) tube does produce a loud buzz.
Here's a couple pages of paperwork for easy reference:
[Image: https://farm2.staticflickr.com/1835/3015...d8e7_z.jpg]
[Image: https://farm1.staticflickr.com/939/44020...4e60_z.jpg]
Blessings,
Jeff W.
Jonesboro, Arkansas
http://jeffsradios.weebly.com
God loves you as you are, not as you should be, because none of us are as we should be. - Brennan Manning