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Author Topic: Looking for a PSU cap for Crest 8001 amp  (Read 4273 times)

John Roberts {JR}

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #20 on: February 02, 2018, 03:25:22 pm »

Them nerds be good for something...

JR
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David Pedd

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #21 on: February 02, 2018, 03:30:37 pm »


Tedess was one of the first vendors I checked. This cap is only 2" diameter and about 4 1/16" tall. It's pretty compact for it's capacitance and voltage.

Are you saying the Tedess cap is smaller than the original cap?  If smaller, is that a problem?
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Scott Holtzman

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #22 on: February 02, 2018, 03:40:02 pm »

Don't get too carried away (like think double) with the capacitance.  The inrush current could be more than the PS can handle.

Other than that a set of matched caps that exceed OEM specs will make the amp seem new.  You will be surprised.  Your energy reserve is probably 1/4 of what it was new.

I would also reflow the boards while I was in there.  Burn away any trapped moisture and clear up any marginal connections.

Sent from my VS995 using Tapatalk

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Bob Leonard

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #23 on: February 05, 2018, 09:27:26 am »

I just sorted through a bunch of similar caps. Send me a PM as a reminder and I'll check tonight.

I'm assuming the terminals are screw type, which makes no difference, and the cap is mounted in a clamp.
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Greg_Cameron

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #24 on: February 05, 2018, 01:28:16 pm »

Are you saying the Tedess cap is smaller than the original cap?  If smaller, is that a problem?


Hi David. No, the Tedess cap is substantially larger. The caps they're selling are for large scale UPS systems, so they're not concerned with a more compact form factor.


Cheers,
Greg
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Greg_Cameron

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #25 on: February 05, 2018, 01:30:05 pm »

I just sorted through a bunch of similar caps. Send me a PM as a reminder and I'll check tonight.

I'm assuming the terminals are screw type, which makes no difference, and the cap is mounted in a clamp.


Thanks Bob. I've already placed the order with Digikey though ;) They are screw terminal and clamped.


Greg
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Cameron Pro Audio

Greg_Cameron

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #26 on: February 15, 2018, 12:48:27 am »

Thanks Bob. I've already placed the order with Digikey though ;)  They are screw terminal and clamped.



New caps came today. To be installed this weekend. Note to self - make absolutely sure the polarity is absolutely correct. Caps that big must be extremely unpleasant when they explode.


Interesting octagon impression on the sides of these...
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Chris Hindle

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #27 on: February 15, 2018, 01:28:45 am »




New caps came today. To be installed this weekend. Note to self - make absolutely sure the polarity is absolutely correct. Caps that big must be extremely unpleasant when they explode.


Interesting octagon impression on the sides of these...


Yup, Them's screwdriver melters....
Have fun, be safe.
Chris.
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Art Welter

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #28 on: February 15, 2018, 01:01:53 pm »


Interesting octagon impression on the sides of these...

Just means all the dielectric goo has dried up, no worries ;^).
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Greg_Cameron

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Re: Looking for a PSU cap for Crest 8001 amp
« Reply #29 on: February 15, 2018, 04:48:24 pm »

Just means all the dielectric goo has dried up, no worries ;^).


 ;D


One of my hardware engineers here at my day job said it was to strengthen the casing ;)
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