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Audio and Video Talk
Valves / Vacuum Tubes
SCC88/PCC88 heaters in series?
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<blockquote data-quote="Ampdog" data-source="post: 1095385" data-attributes="member: 144"><p>Moonraker,</p><p></p><p>Yes - but that does not explain why the ECC88 heaters should often draw currents more than 15% off the spec.value! One would expect the heater wire to be of the same gauge!??</p><p></p><p>My point with series connecting heater(s) is that it is easier to design a high-voltage lower current d.c. heater supply than a 6,3V .d.c. high current one to e.g. avoid introduction of hum in pre-amps.</p></blockquote><p></p>
[QUOTE="Ampdog, post: 1095385, member: 144"] Moonraker, Yes - but that does not explain why the ECC88 heaters should often draw currents more than 15% off the spec.value! One would expect the heater wire to be of the same gauge!?? My point with series connecting heater(s) is that it is easier to design a high-voltage lower current d.c. heater supply than a 6,3V .d.c. high current one to e.g. avoid introduction of hum in pre-amps. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
SCC88/PCC88 heaters in series?
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