Quad II power amps......power output transformers!!!

bwes87 · 9th September 2008, 10:36 PM

hi folks !!!....i'm brand new on this site and an avid vintage hi-fi fan.......i would like to thank you all in advance for any help you can lend me !!!......i recently picked up a pair of old Quad II mono block tube amps .......a local tech and friend of mine went through them and discovered the power output transformers were no good............anyone have any ideas for suitable replacements or how i should proceed ?......thanks again !!!....regards , Ben

Wavebourn · 9th September 2008, 11:10 PM

If you don't need to switch output impedances you may take one from Edcor with 4 and 16 Ohm output, and use 4 and 16 Ohm taps for cathode feedback.

cerrem · 10th September 2008, 12:25 AM

Quote:

Originally posted by bwes87
hi folks !!!....i'm brand new on this site and an avid vintage hi-fi fan.......i would like to thank you all in advance for any help you can lend me !!!......i recently picked up a pair of old Quad II mono block tube amps .......a local tech and friend of mine went through them and discovered the power output transformers were no good............anyone have any ideas for suitable replacements or how i should proceed ?......thanks again !!!....regards , Ben

It seems odd that BOTH mono blocks have same transformers that are bad...??????
Are you refering to the Output Transformer or the Power Transformer???
Make sure you have the 120V version tap on your power transformers, not the 200, 220, 240 volt versions....

Chris

bwes87 · 10th September 2008, 02:20 AM

my bad ....it is the output transformers.......one puts out 5 watts and one puts out 20 watts but arc's and blows a fuse in about 45 seconds........and they are the 120 volts..........one output transformer arc's internally and one blows a fuse in 45 seconds.......i just got off the phone with my tech , he seems to think it's a bit hopeless ...rather like throwing good money after bad.........wasn't what i wanted to hear but oh well ......anyone has any other suggestions i would really appreciate it but these may end up being a doorstop and a paper weight !!......again , i really appreciate the help !!

9th September 2008, 10:36 PM	#1
bwes87 diyAudio Member Join Date: Sep 2008	Quad II power amps......power output transformers!!! hi folks !!!....i'm brand new on this site and an avid vintage hi-fi fan.......i would like to thank you all in advance for any help you can lend me !!!......i recently picked up a pair of old Quad II mono block tube amps .......a local tech and friend of mine went through them and discovered the power output transformers were no good............anyone have any ideas for suitable replacements or how i should proceed ?......thanks again !!!....regards , Ben

9th September 2008, 11:10 PM	#2
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	If you don't need to switch output impedances you may take one from Edcor with 4 and 16 Ohm output, and use 4 and 16 Ohm taps for cathode feedback. __________________ Amicus est Socrates, magister meus, sed magis est arnica veritas.

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10th September 2008, 02:20 AM	#4
bwes87 diyAudio Member Join Date: Sep 2008	my bad ....it is the output transformers.......one puts out 5 watts and one puts out 20 watts but arc's and blows a fuse in about 45 seconds........and they are the 120 volts..........one output transformer arc's internally and one blows a fuse in 45 seconds.......i just got off the phone with my tech , he seems to think it's a bit hopeless ...rather like throwing good money after bad.........wasn't what i wanted to hear but oh well ......anyone has any other suggestions i would really appreciate it but these may end up being a doorstop and a paper weight !!......again , i really appreciate the help !!

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