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Replacing NTC resistor in Philco 52-940
#2

Just a suggestion. I have never tried it. If the globar is open replace it with a 100 ohm 10 watt resistor and add a CL-90 in series with the On/off switch. Another possibility is to replace the 35L6 with a 50L6 and do away with the 100 ohm globar and still add a CL-90 in series with the on/off switch to prolong the life of the tube filaments.

I have used a CL-90 in AA5 sets without any original surge resistor protection eg. a Emerson 503. It drops 4-5 volts and increases warm up time to about 30 seconds. In general I usuallly add a CL-90 to all the sets that I restore just to prolong tube life. It's kind of neat to watch the pilot light ramp up to full brightness. Icon_smile Mount the CL-90 so there is as much clearance as possible to other components, particularly electrolytics. CL-90s get hot. That is how they work. Mouser has CL-90s and does not have a minimum order charge.

Kind regards,
Terry
http://home.comcast.net/~suptjud/
"Life is simpler when you plow around the stump."


Messages In This Thread
Replacing NTC resistor in Philco 52-940 - by don'tdomelikethat - 07-12-2006, 07:11 AM
[No subject] - by Terry Judkins - 07-14-2006, 08:58 AM



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