replacing power supply capacitors

dansemacabre · 14th December 2010, 11:29 PM

I am rebuilding a BGW 750A and need to replace some caps including the power supply capacitors. I am not looking to rebuild this to original specs and if a change would improve performance I would like to do that. I am having a hard time finding an exact replacement and wonder if I can increase or decrease capacitance and to what degree is acceptable. Currently there are two GE 21000uF 85V large can screw type capacitors. Would I be better to move up to 22000uF or down to 19000uF and what difference will it make? I have checked some of the online large electronic supply companies and have been unsuccessful at finding an exact replacement. Would I be better going to more quantity of caps? Thanks

VictoriaGuy · 15th December 2010, 12:13 AM

Either of your alternatives should work just fine, if they will fit properly - check the lead spacing. A small increase in PS cap capacity won't do any harm, so the 22000uF will be OK.

John

Apex Jr · 15th December 2010, 01:04 AM

I would like to let you know I have in stock some Adcom 22,000Uf 100V
Computer Grade caps --- 2 1/2" Diameter and 4 1/2" Tall
These are new surplus and are $23.95 each
http://www.apexjr.com/images/AdcomCap.jpg

Steve @ Apex Jr.
Apex Jr.Home Page

dansemacabre · 15th December 2010, 02:39 AM

Thanks for the quick replies. Apex Jr, I measured mine and they are 3" diameter x 4 1/2" tall. I need 6 as I am refurbishing 3 amps. I really would like to find a direct size replacement, but if am unsuccessful, that seems like a good price. I think I have enough forgiveness in the wiring to accommodate those. Do you carry the clamps also?

Thanks
Devin

Apex Jr · 15th December 2010, 04:15 AM

Yes.... .89ea

Steve

14th December 2010, 11:29 PM	#1
dansemacabre diyAudio Member Join Date: Dec 2009 Location: Portland, Oregon	replacing power supply capacitors I am rebuilding a BGW 750A and need to replace some caps including the power supply capacitors. I am not looking to rebuild this to original specs and if a change would improve performance I would like to do that. I am having a hard time finding an exact replacement and wonder if I can increase or decrease capacitance and to what degree is acceptable. Currently there are two GE 21000uF 85V large can screw type capacitors. Would I be better to move up to 22000uF or down to 19000uF and what difference will it make? I have checked some of the online large electronic supply companies and have been unsuccessful at finding an exact replacement. Would I be better going to more quantity of caps? Thanks

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15th December 2010, 12:13 AM	#2
VictoriaGuy diyAudio Member Join Date: Dec 2008 Location: Victoria, BC	Either of your alternatives should work just fine, if they will fit properly - check the lead spacing. A small increase in PS cap capacity won't do any harm, so the 22000uF will be OK. John

15th December 2010, 01:04 AM	#3
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	I would like to let you know I have in stock some Adcom 22,000Uf 100V Computer Grade caps --- 2 1/2" Diameter and 4 1/2" Tall These are new surplus and are $23.95 each http://www.apexjr.com/images/AdcomCap.jpg Steve @ Apex Jr. Apex Jr.Home Page

15th December 2010, 02:39 AM	#4
dansemacabre diyAudio Member Join Date: Dec 2009 Location: Portland, Oregon	Thanks for the quick replies. Apex Jr, I measured mine and they are 3" diameter x 4 1/2" tall. I need 6 as I am refurbishing 3 amps. I really would like to find a direct size replacement, but if am unsuccessful, that seems like a good price. I think I have enough forgiveness in the wiring to accommodate those. Do you carry the clamps also? Thanks Devin

15th December 2010, 04:15 AM	#5
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	Yes.... .89ea Steve

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