RE: How to determine the voltage drop in an unloaded and loaded PS - sony6060 - Tube DIY Asylum

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RE: How to determine the voltage drop in an unloaded and loaded PS

In Reply to: How to determine the voltage drop in an unloaded and loaded PS posted by DAK on March 2, 2015 at 21:17:10:

I use the PSUII power supply simulator. The transformer HV winding & choke winding resistance must be inserted for accurate results. Additionally the capacitor ESR should be inserted as well, but is not as critical as the winding DCR.
Performing an educated guess at the transformer & choke winding DCR, 322 volts @ 200ma & 495 volts @ 10ma (bleeder resistor).
Wanting 400 volts, change the rectifier tube to a 5R4G and add 10uF capacitor for a CLCLC. The simulator indicates 390 volts @ 200ma. If the transformer has a 115 volt primary and your line voltage is 120 volts, that 400 volts should be achieved. Load at 10ma produces 531 volts.
Notes-
Simulation included 31 ohm DCR for power transformer, 30 ohms for 3HY choke & 60 ohms for the 7HY choke.

I prefer a 5R4G rectifier due to the high PIV rating. It should not arc inside the tube.

I would use caution using a new manufacture 5AR4 on a 800 VCT winding. A NOS 5AR4 should be ok.
Capacitor input is more demanding on a transformer due to the higher peak to average current demand. About 140 degrees F is the maximum temperature I recommend for a vintage power transformer.

Edits: 03/03/15 03/03/15

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Follow Ups Full Thread

Topic - How to determine the voltage drop in an unloaded and loaded PS - DAK 21:17:10 03/02/15 (7)

RE: How to determine the voltage drop in an unloaded and loaded PS - dave slagle 10:24:14 03/03/15 (1)

RE: How to determine the voltage drop in an unloaded and loaded PS - DAK 11:45:35 03/03/15 (0)

RE: How to determine the voltage drop in an unloaded and loaded PS - Chip647 07:17:56 03/03/15 (2)

RE: How to determine the voltage drop in an unloaded and loaded PS - DAK 09:54:02 03/03/15 (0)

And this is what it would look like with a 2.3uf First Cap - Chip647 07:24:21 03/03/15 (0)

RE: How to determine the voltage drop in an unloaded and loaded PS - sony6060 03:49:20 03/03/15 (1)

RE: How to determine the voltage drop in an unloaded and loaded PS - DAK 10:08:56 03/03/15 (0)

Follow Ups

RE: How to determine the voltage drop in an unloaded and loaded PS - sony6060 03:49:20 03/03/15 (1)

RE: How to determine the voltage drop in an unloaded and loaded PS - DAK 10:08:56 03/03/15 (0)

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