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Fender Rebuild
Fender Rebuild
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Old 11th May 2008, 06:30 AM   #1
lpd is offline lpd  Canada
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Default Fender Rebuild

I recently acquired a Fender Vibrasonic 5G13 circuit. I ramped up the voltage to test the power transformer/output transformer (I purchased it as is with missing tubes) and it gives output. I am going to rebuild the power supply and recap as I want to play it, not collect. Any suggestion for the 20mf @ 600VDC axials. Very expensive caps. Any suggestions for the coupling caps ie types to retain close to original tone. I realize the caps today are different than vintage caps but the caps in this amp are 48 years old and have probably drifted seriously.

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Old 18th May 2008, 02:04 PM   #2
Junction is offline Junction  Malaysia
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If you find the 20uF 600V caps too expensive, you can use 2 x 20uF 300V caps in series, normally much cheaper this way.
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Old 18th May 2008, 09:26 PM   #3
Geek is offline Geek
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Ah yes sorry, I got sidetracked on this topic

2 x 47uF @ 450V in series will give you a nice 23.5uF @ 900V. Use a resistor across each (220K @ 2W is good) capacitor to equalize things.

I'll dig through my emails when I get home tonight.

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Old 14th June 2008, 06:44 PM   #4
Enzo is offline Enzo  United States
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What is the B+ voltage in that amp when tubes are installed? Is it under 500v? If so, then yuo don't need 600v caps.
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