Quote:
Originally Posted by bigaudioal
After about 40 minutes, my power transformer does heat up. It does not get too hot to touch. It heats up so that if I put my entire hand on it, it is nice and toasty. I can keep my hand on it indefinitely without burning myself. Once it gets to this temp, it seems to stabilize there.
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This may be a wild goose chase . . . . . but it is worth a check.
Make the power transformer resistance check suggested at the bottom of Rider page 3-9 and continuing at the top of page 3-10 in the 19A1
Rider schematic downloadable at:
http://www.earlytelevision.org/tv_sc..._diagrams.html
Then make sure you are using the correct rectifier tube!
The 19A1 chassis was
occasionally supplied with power transformers made for the 5U4G instead of the 5Y3. If the wrong rectifier tube is used, this usually produces lower DC voltage, but if a 5Y3 were used with the less common 5U4 transformer, the DC might be slightly higher. The wrong tube can also produce transformer overheating.
James