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no reception 57C
Radioroslyn
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#5

11-14-2011, 06:37 PM
To measure the ant coil, Unplug set connect ohm meter from the ant post and chassis ground. Turn the volume full up. Meter should read just a few ohms if not time to rewind.
The oscillator coil can be checked by connecting the ohm meter to chassis ground and then find pin 5 of the mixer tube. Pin 5 will have a resistor and a capacitor in parallel connected to it. The other end of the r/c will connect to the oscillator coil. At that point connect your ohm meter. Same as the ant coil, must have a low resistance like 3-5ohms.
Terry

ps Check 21, 22, and 24. Those are the critical ones they need to be within 10 percent of spec. Check 9 and 11. Those should be within a Kohms of spec.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
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Messages In This Thread
no reception 57C - by kbm37-630 - 11-12-2011, 08:43 PM
Re: no reception 57C - by Ron Ramirez - 11-13-2011, 07:30 AM
Re: no reception 57C - by Ron Ramirez - 11-13-2011, 07:33 AM
Re: no reception 57C - by kbm37-630 - 11-13-2011, 01:44 PM
Re: no reception 57C - by 7estatdef - 11-14-2011, 06:37 PM
Re: no reception 57C - by kbm37-630 - 11-19-2011, 10:50 AM
Re: no reception 57C - by gvel - 11-20-2011, 10:51 AM
Re: no reception 57C - by 7estatdef - 11-20-2011, 03:34 PM
Re: no reception 57C - by kbm37-630 - 11-20-2011, 06:16 PM
Re: no reception 57C - by 7estatdef - 11-21-2011, 02:09 PM



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  1. The PHILCO Phorum
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