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Philco 38-7CS Restoration
#7

I bought a new 6J5G tube and I replaced the 6A8. There seems to be no apparent change. I realigned it again. I notice that when I try to adjust the tuning condenser (4A) that there's not much of a change. Its very subtle.  All the IFs seems to be working and they are peaked. The ant and oscillator coils seems to be fine as well. I notice that the trim pot for (7A) is a little sensitive.  It picks up stations but still a lot of hiss/static and is only strong on anything below 1000kc. Even with an antenna, nothing is strong above it. 1010 WINS NYC is a very strong station and that barely comes through. 

The signal generator is fairly accurate. 

I went through the remaining resistors. I haven't changed them out yet. There is one hidden in the 2nd IF Can that I haven't gotten to yet. I have to take the can apart. Its a 51,000 ohm resistor. There are about 4-5 left throughout. All the 1.0 M resistors are a little high around 1.2 M and then there's this one that's in the picture. On the schematic, it should be a 1.0 M, but its metering around 1.8M. That can't be right? I didn't see any service bulletin about it being changed and it looks original. The Candohm isn't that far off, but I'll probably rebuild it as well.

I'm still learning the circuits, but where is the AVC on the schematic? 

Thanks


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Messages In This Thread
Philco 38-7CS Restoration - by beanderson - 10-11-2017, 10:41 PM
RE: Philco 38-7CS Restoration - by beanderson - 10-12-2017, 12:11 AM
RE: Philco 38-7CS Restoration - by Radioroslyn - 10-12-2017, 03:13 AM
RE: Philco 38-7CS Restoration - by beanderson - 10-12-2017, 05:47 AM
RE: Philco 38-7CS Restoration - by beanderson - 10-16-2017, 09:55 PM
RE: Philco 38-7CS Restoration - by Radioroslyn - 10-17-2017, 07:26 AM
RE: Philco 38-7CS Restoration - by beanderson - 10-27-2017, 09:25 PM
RE: Philco 38-7CS Restoration - by Radioroslyn - 10-28-2017, 09:43 AM



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