Graybar/RCA Chasis

5/19/2009 5:35:07 PMBruce Walters

I have a Graybar model 700 with four 224s, two 227s, two 245s and an 280 rect. I am 90% sure it is an RCA chasis, but I can't find a chasis number on it anywhere. The sound volume is too loud and I suspect a flakey resister and or one was incorrectly replaced, but i can't trouble shoot the beast without a schematic. Anyone know for sure it is an RCA and which chasis it might be?

5/19/2009 6:03:43 PMCarl T

:I have a Graybar model 700 with four 224s, two 227s, two 245s and an 280 rect. I am 90% sure it is an RCA chasis, but I can't find a chasis number on it anywhere. The sound volume is too loud and I suspect a flakey resister and or one was incorrectly replaced, but i can't trouble shoot the beast without a schematic. Anyone know for sure it is an RCA and which chasis it might be?

Bruce,
Take a look at the Radiola 80:

http://www.nostalgiaair.org/PagesByModel/342/M0040342.pdf

Carl T

5/19/2009 7:14:22 PMBruce W

::I have a Graybar model 700 with four 224s, two 227s, two 245s and an 280 rect. I am 90% sure it is an RCA chasis, but I can't find a chasis number on it anywhere. The sound volume is too loud and I suspect a flakey resister and or one was incorrectly replaced, but i can't trouble shoot the beast without a schematic. Anyone know for sure it is an RCA and which chasis it might be?
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:Bruce,
:Take a look at the Radiola 80:
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:http://www.nostalgiaair.org/PagesByModel/342/M0040342.pdf
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:Carl T

Thanks Carl,

That sure looks right to me, I appreciate the help.

5/19/2009 7:36:32 PMEdd

Try this size 80-82-86 on, and see if it fits, or is at least close enough to work with .

73's de Edd

RCA_Model’s 80-82-86. . . . . . SCHEMATIC :

5/20/2009 11:57:36 AMBruce W

You guys spoil me with such great knowledge. I felt really good about fixing this one last night. I turned the chasis over and there was one obvious repair that had been done. Someone relaced a resistor that was part of the voltage divider network that included the volume control. I measured the replaced resistor at 38K instead of 18K, then of course replaced it. BINGO! Funny how often the problems are a result of someone elses "repair".

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