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Crest Audio 4801 PSU Capacitors
Crest Audio 4801 PSU Capacitors
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Old 21st October 2008, 05:03 PM   #1
tarka25 is offline tarka25  United Kingdom
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Default Crest Audio 4801 PSU Capacitors

Hi,
I was wondering if anyone knew where to source the 17,000uf 55v capacitors that appear on the power supply pcb.

I have searched, but cannot find the ones in the correct package size, they all seem to be 2.5" diameter.

Many thanks

Diane
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Old 21st October 2008, 08:38 PM   #2
lineup is offline lineup  Sweden
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try to find some 15.000 or even 10.000 uF
can not be very critical
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Old 22nd October 2008, 01:36 AM   #3
KBK is offline KBK  Canada
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show us the type (mounting) and size of the given capacitors. If anything, go for slightly more capacitance, not less...as most commercial designs are a hair skimpy with energy storage.

All sizes are standardized if they are snap mount or 2.5" diameter screw in type. If it is an amplifier that is more than about 10 years old, nowadays..there is likely to be a better quality and slightly bigger cap for that given can size.
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Old 23rd October 2008, 06:15 PM   #4
tarka25 is offline tarka25  United Kingdom
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They are 1.5"dia, 3 pin snap in and approx 3" high.
I'm a little nervous at changing the values as there are 4 caps all linked in parallel, I could change them all if I was changing values, bur realistically it's going to cost in excess of 60 to do that, so I would rather source one that could just be swapped in.
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Old 29th November 2020, 04:52 PM   #5
AWESOMEDADDY is offline AWESOMEDADDY
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Default DUDE THEM CAPS

Sorry if this is the wrong spot to post but hey I have no clue of what im doing on a computer im just looking for help is all . Ok so I have 2 CREST AUDIO 4801's from 11/89 and in the 4 slot rack box they came in mice were living behind them so the bottom one is a bit urine soaked but here's my deal I hooked both amps up using 1 to power 1 x 18" passive ELECTRO VOICE ELIMINATOR sub bridged mono mode and the other to power some B-52 mx1515's in stereo mode. Well I screweed uip and just ran a straight 2 wire cable to the sub powered everything up started to rock and smoke from sub amp. Opened it up and the PSU board with them big caps had been scorched on top side of board upon removal the underside of the board was all puffy and the traces had been seperrated from the board...now total junk ! I have searched the board number ,amp model everything I can think of but I need a new complete board or this amp is garbage bound. Any ideas of where I could find one or something to make this amp work again or am I just screwed and need to just buy new? Thanks everyone for your help
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Old 30th November 2020, 03:10 AM   #6
PRR is online now PRR  United States
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Crest Audio 4801 PSU Capacitors
> [i]mice were living behind them so the bottom one is a bit urine soaked[i]

Mouse pee is conductive. Plus electricity, destructive.

> .....powered everything up ....smoke from sub amp. ....PSU board ...scorched ...puffy and the traces had been seperrated from the board...now total junk!

A consolidated service manual:
Crest Audio 4801 Stereo Power Amplifier Manual | HiFi Engine
(registration is harmless)

You can't buy boards for older amps. And you can buy similar amplifiers fairly affordably. While there is not a LOT of essential stuff on those power supply boards, I would not try to re-create one if I could buy a working amp.
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