06-07-2011, 11:50 AM
This is my first post on the Phorum.
I have been working on a Philco 37-89F and have a couple of questions. I have been using the schematic I got from Nostalgia Air.
The schematic shows the grid of the 6K7 1st IF amp connected thru the secondary of the 1st IF transformer thru a brown wire to the AVC bias line. However, my radio has the brown wire going to chassis ground and it looks like it came from the factory that way. Can you tell me which is correct?
The second question I have is about a replacement for the RF choke, part #11 in the schematic. When I originally measured it I read 85 ohms instead of 9 ohms from the schematic. However, I now show that it is totally open. I see that Antique Electronic Supply has an rf choke part number P-C1535B that is also 9 ohms. Will it work as a replacement?
Thanks for any info. Dick
I have been working on a Philco 37-89F and have a couple of questions. I have been using the schematic I got from Nostalgia Air.
The schematic shows the grid of the 6K7 1st IF amp connected thru the secondary of the 1st IF transformer thru a brown wire to the AVC bias line. However, my radio has the brown wire going to chassis ground and it looks like it came from the factory that way. Can you tell me which is correct?
The second question I have is about a replacement for the RF choke, part #11 in the schematic. When I originally measured it I read 85 ohms instead of 9 ohms from the schematic. However, I now show that it is totally open. I see that Antique Electronic Supply has an rf choke part number P-C1535B that is also 9 ohms. Will it work as a replacement?
Thanks for any info. Dick
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