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37-670 No Sound
#6

(03-10-2016, 06:17 PM)dfields69 Wrote:  
(03-10-2016, 05:04 PM)Radioroslyn Wrote:  >The 200 ohm section that appears to handle the plate voltage for two 6J5 "driver" tubes is not generating a reading. Does that mean it is open/bad and what may I do to rectify the situation?

If there is no plate voltage on the 6J5 then the answer is yes. Well there is two answers. One you could replace the driver transformer. Or connect a resistor across the primary(like 70k or so ) and then connect the cap(like a '01 @630v) from the plate of the 6J5 to one of the grid connection on the transformer secondary.

Replacing the transformer is more efficient but adding the resistor and cap is much easier/cheaper.

Terry
What wattage on the 70K resistor? 1 watt or higher? And the grid connection would be the low ohm sections that go to the input grids on the 6F6's? I have never, ever fooled with one of these so pardon all of the questions. Terry, you have consistently come to my rescue here and I am very grateful! I sure wish i could return the favor somehow...thanks.

OOphsss!!!
I just looked that the schematic, I was thinking that it used a single driver tube but it doesn't it's push/pull. So you'll need two resistor one for each primary and two caps to go from each the driver tube plate (pin3) to the 6F6 grid (pin5). 1/2w  should be ok.
Glad to help out!
Terry


Messages In This Thread
37-670 No Sound - by dfields69 - 03-10-2016, 03:03 PM
RE: 37-670 No Sound - by Radioroslyn - 03-10-2016, 05:04 PM
RE: 37-670 No Sound - by dfields69 - 03-10-2016, 06:17 PM
RE: 37-670 No Sound - by dfields69 - 03-10-2016, 06:20 PM
RE: 37-670 No Sound - by Radioroslyn - 03-10-2016, 07:38 PM
RE: 37-670 No Sound - by Radioroslyn - 03-10-2016, 07:21 PM
RE: 37-670 No Sound - by morzh - 03-10-2016, 07:19 PM
RE: 37-670 No Sound - by morzh - 03-10-2016, 08:02 PM
RE: 37-670 No Sound - by dfields69 - 03-10-2016, 08:24 PM
RE: 37-670 No Sound - by Radioroslyn - 03-11-2016, 12:38 AM
RE: 37-670 No Sound - by dfields69 - 03-11-2016, 02:19 AM
RE: 37-670 No Sound - by Mondial - 03-11-2016, 09:42 AM
RE: 37-670 No Sound - by dfields69 - 03-11-2016, 12:59 PM
RE: 37-670 No Sound - by Mondial - 03-11-2016, 03:37 PM
RE: 37-670 No Sound - by dfields69 - 03-12-2016, 02:16 AM
RE: 37-670 No Sound - by dfields69 - 03-12-2016, 02:17 AM
RE: 37-670 No Sound - by Mondial - 03-12-2016, 09:53 AM
RE: 37-670 No Sound - by dfields69 - 03-23-2016, 05:10 PM
RE: 37-670 No Sound - by morzh - 03-23-2016, 07:06 PM
RE: 37-670 No Sound - by Radioroslyn - 03-23-2016, 07:30 PM
RE: 37-670 No Sound - by davemc - 03-24-2016, 08:07 AM
RE: 37-670 No Sound - by Ron Ramirez - 03-31-2016, 09:58 PM
RE: 37-670 No Sound - by dfields69 - 03-31-2016, 11:37 PM
37-670 Continued Woes - by dfields69 - 03-31-2016, 09:47 PM



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