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Originally Posted by yagosaga
I did it tonight. The readings of the test meters:
Start: b+ 371v, horizontal output current 210ma, high voltage 21kv ...
60 minutes: b+ 371v, horizontal output current 210ma.
No significant changes. ... The flyback was a little warmer after 15 minutes and very warm after one hour, not hot, estimated temperature appr. 50 to 55 degrees celsius.
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Tonight I have checked the flyback of my PALcolor 708, the first PAL color tv set by Telefunken, which has nearly the same currents like the RCA CTC-5 (380 volts). After one hour the flyback was much more as hot as the flyback of the ctc-5. One can't touch the flyback of the PALcolor for a longer time because it is too hot! In comparison the ctc-5's flyback was really cold.
Both sets are operating with 380 volts in the horizontal output unit (anode voltage for the horizontal output tube), the ctc-5's current shouldn't extend 220 ma. The PALcolor has 260 mA horizontal output current. This indicates that the growing temperature of the flyback of the ctc-5 is in the normal range.