This should be fun (RCA TM-10 15GP22 monitor)

[Phil Nelson]

Working even more slowly than my usual snail's pace, I have begun replacing electrolytics & whatnot in the TM-10 monitor. In the service manual, someone penciled in a little modification to the power supply:

http://antiqueradio.org/art/RCA_TM-10_P-S_Mod.jpg

The mod would add two 7-ohm, 25-watt resistors in series with the selenium rectifiers, presumably to reduce surge on startup.

I'm debating whether to substitute something like CL-60 thermistors for the resistors. If you have an opinion on that, vote early and vote often.

I have begun an article about the restoration. Obviously, there will be much more to come.

http://antiqueradio.org/RCA_TM-10_15GP22_Monitor.htm

Regards,

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

[ohohyodafarted]

Originally Posted by Phil Nelson

I have begun an article about the restoration. Obviously, there will be much more to come.

Nice job on the start of your restoration article Phill! Looking forward to seeing more as time goes by. It's giving me a good idea of what I have to look forward to when I get to a point when I can start the restoration of the TM-10 I acquired a while back.

[Phil Nelson]

Thanks. Balloting is still open on whether to use a thermistor in place of a resistor in that little modification. Since I already have some CL-60s on hand, I'm leaning in that direction. Or, perhaps it doesn't really matter.

I'd normally just put something in and then monitor voltages when I bring the set up for the first time. The rectifiers are not in a convenient place, however. To remove the cage around them, you need to pull the CRT and yoke, which does not invite casual experimentation.

Phil Nelson