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In Reply to: RE: current hogging in a 2 tube rectifier ps posted by Triode_Kingdom on July 28, 2014 at 07:13:27
My rectifier circuit is copied from an earlier post which should be a parallel arrangement. Is there any advantage or disadvantage for hooking up the 2 rectifiers in parallel vs the way in the Scott? My PT doesn't have a ct. regards, Dak
Follow Ups:
"Is there any advantage or disadvantage for hooking up the 2 rectifiers in parallel vs the way in the Scott?"
The rectifiers conduct alternately in the Scott arrangement, so current imbalance isn't an issue. How are you wiring this if your xfmr has no CT? That requires a bridge with four rectifiers.
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The high voltage is ct. The 5v heater is not unlike the scott.
OK, that's not too important. Most of the 5V heater windings I've seen have not been center-tapped. What are you doing with the rectifiers - two parallel tubes on each leg of the HV winding? Maybe you could post a sketch.
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Hi TK, I copied the schematic from the post on July 12, in this section. It is under the title "what is the best way to hook up 2 rectifiers" and under sub section "tom I am not sure what you mean by that".
OK, I see that what you're doing is identical to the Scott, other than the CT for the filament winding and parallel filaments. There's no problem paralleling the anodes within a single envelope. You don't need balancing resistors, they'll just degrade supply dynamics. If it were me, I'd consider copying the Scott schematic in terms of the 30 ohm resistor and first two filter caps. Increasing the second cap to 40uF or so might be beneficial, but only if the power supply sags on extended low-frequency passages.
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Buy Chinese. Bury freedom.
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