Cheap HT Power Supplies

GroupDIY Audio Forum

Help Support GroupDIY Audio Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

buildafriend

Well-known member
Joined
Jun 30, 2009
Messages
1,392
Location
Omnipresent NYC
Hi,

I'm thinking about buying one of these.  What do you guys think? Is there a cheaper and better option where I'm not stuck building things to fix things? It becomes a bit paradoxical at times  ;D

https://www.ebay.com/itm/New-220V-HSPY-400-01-Adjustable-400V-1A-programmable-DC-Power-Supply-Factory/273396348359?epid=26022378701&hash=item3fa7b135c7&autorefresh=true
 
I have this Bench PSU and I love it:

https://uk.farnell.com/tenma/72-10480/power-supply-1ch-30v-3a-adjustable/dp/2251946

It's not an HT psu as it goes only to 30V.

I guess if you want to have something cheaper than your link and adjustable to 400V you have to build something yourself using this ebay modules:

https://www.ebay.co.uk/itm/DC-DC-Boost-Converter-8-32V-to-45-390V-High-Voltage-ZVS-Step-up-Booster-Module/273639348238?hash=item3fb62d180e:g:QhgAAOSwj91cL0Mu
 
buildafriend said:
Hi,

I'm thinking about buying one of these.  What do you guys think? Is there a cheaper and better option where I'm not stuck building things to fix things? It becomes a bit paradoxical at times  ;D

https://www.ebay.com/itm/New-220V-HSPY-400-01-Adjustable-400V-1A-programmable-DC-Power-Supply-Factory/273396348359?epid=26022378701&hash=item3fa7b135c7&autorefresh=true

i would love to see the insides of one of these just to see how it was done.

Cheers

Ian
 
I’ll post a gut pic if I get it. I’m playing the “best offer” game at the moment

This is mainly because I’m tired of not being able to inject power in place of bad HT supplies to prove the rest of the circuit as good
 
squarewave said:
Presumably it's just a constant current SMPS with variable PWM / PFM to adjust the voltage.

There is a kind of technical description but the English is so poor it is hard to tell what it actually means. But it does seem clear that it is some combination of an SMPS and a linear regulator.

Edit, and I do not believe the claimed 2mV ripple if it is solely an SMPS.

Cheers

Ian
 
buildafriend said:
I’ll post a gut pic if I get it. I’m playing the “best offer” game at the moment

This is mainly because I’m tired of not being able to inject power in place of bad HT supplies to prove the rest of the circuit as good

Did you check this link?

https://rover.ebay.com/rover/1/710-53481-19255-0/1?toolid=20001&campid=5336911176&customid=link&mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fitm%2FDC-DC-Boost-Converter-8-32V-to-45-390V-High-Voltage-ZVS-Step-up-Booster-Module%2F273639348238%3Fhash%3Ditem3fb62d180e%3Ag%3AQhgAAOSwj91cL0Mu
 
ruffrecords said:
There is a kind of technical description but the English is so poor it is hard to tell what it actually means. But it does seem clear that it is some combination of an SMPS and a linear regulator.

Edit, and I do not believe the claimed 2mV ripple if it is solely an SMPS.
Absolutely. There's going to be some filtering natrually. A choke to take out the HF hash. A regulator just wired as a current source source. Then feedback for the SMPS is sampled from there maybe.
 
400W is a lot of HV power to regulate in a small package ...  interesting, but I'm skeptical

A lot of the cheap eby stuff of this kind can be 'less than robust'  :)
 

Latest posts

Back
Top