Thread: Crosley 9-419M
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Old 03-09-2012, 12:10 AM
DaveWM DaveWM is offline
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Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
replaced most of the "repair" caps, looking good, nice pic now sync and fold over issues improved as I replaced the caps. I used the sams as a guide for the values as I did not trust any thing that did not look original. Its amazing how much better its working. Happens in stages, some caps made a difference others not so much, but I feel its better to at least try to use the as designed values and types. On interesting thing I found was what I think is a germanium diode that is connected to the video detector tube. Its clearly not in the schematic. this set uses a 6AL5 for video detection AND has a 6AL5 for DC restoration. It looks factory based on the age of the diode (looks like a cartrige fuse). I was careful to heat sink it when I was doing some cap replacement. Checked the front to back ratio about 4 to 1 in circuit. (4k one way, 1k the other). I think 10 to 1 is prefered, but with something that old maybe 4 to 1 was the norm, besides I did not look to see if it was isolated in the circuit. I am going to go back and look at the RA-103 dumont and see if it has something like this.
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