03-26-2012, 07:45 PM
I have been working on the 37-660 I picked up recently and have a couple of questions. I have capped it and replaced resistors where necessary. I fired it up and measured volages and all seem to be reasonable except I measure 256V on the plate of the 6K5 where it is supposed to be 150. Also I checked the resistance of the OT and am getting some real high readings. The schematic says on the primary CT to either end should be 330 ohms and 370. I am getting 1540 and 1980. I suspect that there may be those "green spots of corrosion" creating the high readings. I had this happen last year in a 41-629. Can anmyone confirm the approximate resistance readings of the primary should be?
Any clue as to why I would have such a high plate voltage on the 6K5? Thanks.
http://www.nostalgiaair.org/PagesByModel...013220.pdf
Any clue as to why I would have such a high plate voltage on the 6K5? Thanks.
http://www.nostalgiaair.org/PagesByModel...013220.pdf