Power supply help

Original Burnedfingers · 7th July 2003, 12:26 AM

Can anyone tell me what I will end up with voltage wise if I use a 300-0-300 100MA transformer, a 6X4 rectifier, 20H choke, 50mfd cap, 20H choke, and a 50mfd cap?

Thanks in advance

Joe

Bandersnatch · 7th July 2003, 12:32 AM

Hey-Hey!!!,
With no load yo will still get root2 times the unloaded RMS ac voltage. I suggest a run through the Duncanamps PSUDII, power suply design software for a good answer.

Choke input will start you with .9x rms value. the DCR fo the choke will drop this further, and so wil the 6X5. This assumes the load draws more that critical current through the choke.
regards,
Douglas

Original Burnedfingers · 7th July 2003, 12:44 AM

Will I end up with about 230V B+ ?

Colt45 · 7th July 2003, 01:29 AM

depends on the DCR of the L's, and the load..

Original Burnedfingers · 7th July 2003, 02:49 AM

The chokes are 595 ohms each. The load will be a 5687 tube.

Bas Horneman · 7th July 2003, 02:35 PM

Assuming a 14mA load you will get 242,6 volts dc as calculated with PSU2 designer.

7th July 2003, 12:26 AM	#1
Original Burnedfingers diyAudio Member Join Date: Nov 2002	Power supply help Can anyone tell me what I will end up with voltage wise if I use a 300-0-300 100MA transformer, a 6X4 rectifier, 20H choke, 50mfd cap, 20H choke, and a 50mfd cap? Thanks in advance Joe

7th July 2003, 12:32 AM	#2
Bandersnatch diyAudio Member Join Date: Jul 2003 Location: Ann Arbor, MI	Hey-Hey!!!, With no load yo will still get root2 times the unloaded RMS ac voltage. I suggest a run through the Duncanamps PSUDII, power suply design software for a good answer. Choke input will start you with .9x rms value. the DCR fo the choke will drop this further, and so wil the 6X5. This assumes the load draws more that critical current through the choke. regards, Douglas __________________ the Tnuctipun will return

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7th July 2003, 12:44 AM	#3
Original Burnedfingers diyAudio Member Join Date: Nov 2002	Will I end up with about 230V B+ ?

7th July 2003, 01:29 AM	#4
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	depends on the DCR of the L's, and the load..

7th July 2003, 02:49 AM	#5
Original Burnedfingers diyAudio Member Join Date: Nov 2002	The chokes are 595 ohms each. The load will be a 5687 tube.

7th July 2003, 02:35 PM	#6
Bas Horneman diyAudio Moderator Emeritus Join Date: Apr 2002 Location: The Netherlands Blog Entries: 18	Assuming a 14mA load you will get 242,6 volts dc as calculated with PSU2 designer.