Hello and Happy New Year's eve. I have a question about the surgisitor in my W5M amp. I'm thinking about replacing it with a newer CL-80 thermistor. Would I solder the ends as the surgisitor is soldered? I assume the these aren't polarized? I have a W5M mate coming in this week and will make the same mod on it. Comments and suggestions welcomed.
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Heathkit W5M Surgisitor
- Thread starter ddragg1
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Yes, That should be fine.
Another advantage of the CL-80 is it will lower the line voltage just a little bit.
These amplifiers were designed for a 117 and run dam hot, My line regularly hits 122 - 124 vac.
Another advantage of the CL-80 is it will lower the line voltage just a little bit.
These amplifiers were designed for a 117 and run dam hot, My line regularly hits 122 - 124 vac.
I'll bet. ;-) Nice speakers, what are they?
What is your normal line voltage? The CL-90 may be a better option. It's warm resistance will stay a bit higher than the CL-80. The 80 won't drop much voltage when warm. I've use the CL-90 and equivalents of other makes in quite a few tube amps. Even though it is rated at 120 ohm at room temp, it drops down low enough with only about 3/4-1A of line draw. Trial is your only way of really knowing with certainty.