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Old 6th February 2017, 02:55 PM
bikerhifinut bikerhifinut is offline
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Location: Penrith, Cumbria
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Default recommendations for chassis plugs and sockets for power amplifier umbilicals.

I know some of you gents will have built power amps with offboard PSU's so here goes:

Once Mrs N is independent again, I will be resuming my long list of projects too numerous to list ha ha. But the first job looks like the off board PSU for my EL34 monoblocs. This is due to having given up on any realistic chance of silencing the infernally noisy mains transformers. Had em checked by a respected expert and I know they are pretty much a lost cause and the manufacturer was less than helpful when I went back to them.
So another accquaintance has kindly donated a toroid that he wound, I trust this guy so I know it will work. The issue is that i will need to build a "basic" PSU in a separate case and then feed the 450 or so DC volts out after silicon rectification, plus a 9V AC feed for heaters to the monos. I intend to just do basic rectification plus a single stage of smoothing as I will keep the existing CLC filter network in the monos. Like wise the 9V AC winding will be rectified in the chassis and subsequently rectified and regulated to feed the EL34 heaters (the input and phase splitters already have regulated DC sboards fitted.) I will have space where the old drop thro transformers were to bolt on a plate holding the Voltage regs for the EL34, I intend to use a single 3 amp regulator for each EL34 which should be nicely within parameters and likely use the steel Chassis as heat sink.
So at the end of this Ramble the question is what do others use/recommend as suitable connectors for the job. I don't imagine the Umbilicals will be longer than 1.5m so that the PSU will sit between the speakers with the monos directly behind/beside them with Ultra short connecting wires.

Andy
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Old 6th February 2017, 06:20 PM
colin.hepburn colin.hepburn is offline
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Default Re: recommendations for chassis plugs and sockets for power amplifier umbilicals.

Hi Andy
When did my JE labs EL34 single ended amp with a 460 HT
I hard wired it at the psu end saving a socket wire from Mathew as used for phono psu

And these types of socket you just have to look for the pin number you need http://picclick.ca/Metal-Y28M-8TK-Ma...919018888.html
Square mounting plate is about 25mm

Update this is the socket i have 8 pin twist locking so can only be connected the correct way round http://www.ebay.ca/itm/Army-Green-Y2...n_68m3JErlgo3w
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Last edited by colin.hepburn; 6th February 2017 at 07:53 PM. Reason: Added link
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Old 6th February 2017, 10:58 PM
bikerhifinut bikerhifinut is offline
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Default Re: recommendations for chassis plugs and sockets for power amplifier umbilicals.

Thanks Colin.
I see the same seller has a 5 pin type rated at 500V AC which would be spot on for 450V DC I reckon. I think I might just dig the credit card out.

A.
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Old 6th February 2017, 11:58 PM
davebms davebms is offline
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Default Re: recommendations for chassis plugs and sockets for power amplifier umbilicals.

hello all,, thank for the links colin they are just what im looking for

dave
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Old 7th February 2017, 12:57 AM
colin.hepburn colin.hepburn is offline
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Default Re: recommendations for chassis plugs and sockets for power amplifier umbilicals.

Quote:
Originally Posted by davebms View Post
hello all,, thank for the links colin they are just what im looking for

dave
your welcome dave
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