Lab Power Supplies

vdi_nenna · 15th September 2009, 07:10 PM

Can anyone recommend a testing power supply with at least 30v output?
I've seen some on the net but don't know if they are safe.

Garyepe · 18th September 2009, 05:50 AM

Quote:

Originally Posted by vdi_nenna

Can anyone recommend a testing power supply with at least 30v output?
I've seen some on the net but don't know if they are safe.

You can done business by paypal.
it is the savest payment method .

vdi_nenna · 18th September 2009, 04:59 PM

Sorry, I wasn't clear on what I meant to say.

Are they safe electronically as they seem not very costly. I imagined they would cost much more than the prices I see on the internet.

So if I buy a low-end power supply, will it work safely?
Anyone have experince with these?

See example:
http://www.a1parts.com/tequipment/power.htm

Glowbug · 25th September 2009, 06:32 PM

http://surplussales.com/PowerSupplies/PowerS-5.html

They always seem to have cool stuff

Honestly, if I was in the market for an adjustable PSU, I'd probably wait to see when the next hamfest was...you can usually find great deals on older test gear.

Hardi · 27th September 2009, 11:06 AM

Quote:

So if I buy a low-end power supply, will it work safely?

As long as you don´t stress them near their maximum current capability...maybe.
Most of the cheap supplies die when you take high current for longer time due to small heat sinks and undersized parts.

AndrewT · 27th September 2009, 03:32 PM

I have used a few Lab Power Supplies.
I have never had a reliability issue.
My present one is a rebranded version (RS) of a well known make that I bought secondhand.
It is 2channel with adjustable voltage and adjustable current. The supplies can be used independently or series (with tracking) for 60Vdc or +-30Vdc or two @ 30Vdc.
You can hear the relays switching as the voltage is adjusted to minimise heat dissipation on the output devices. It has a fixed 5Vdc as well. The current limit can be adjusted from ~10mA to 2000mA

star882 · 30th September 2009, 12:23 AM

It's surprisingly easy to build your own.

vdi_nenna · 30th September 2009, 12:46 AM

Quote:

It's surprisingly easy to build your own.

Once that can do 30v and 20 amps?

Hardi · 30th September 2009, 04:38 PM

Quote:

Once that can do 30v and 20 amps?

I think so. But parts alone will be more expensive than a (used) professional supply.

dangus · 11:03 AM

See my post in this thread, if you're into building a supply. Once you've got the regulator, the rest isn't hard. Transformer, caps and rectifiers could come from a junked hifi receiver.
http://www.diyaudio.com/forums/power-supplies/82332-diy-dual-lab-power-supply-post956942.html

Here's a working link to the MC1466 data sheet:
http://www.datasheetarchive.com/pdf-...dsa-409990.pdf

[edit]
20 amps???!!! Doing that with a linear supply will be interesting... big transformer, big caps, lots of power transistors.

15th September 2009, 07:10 PM	#1
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	Lab Power Supplies Can anyone recommend a testing power supply with at least 30v output? I've seen some on the net but don't know if they are safe. __________________ Zen, BOZ, BOZ-J, BLS, B1, Mini-A, Audio Sector NOS DAC, Gain Clone, F5, CAT5 Speaker Cable, DIY Allen Wright ICs, MOX II

18th September 2009, 04:59 PM	#3
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	Sorry, I wasn't clear on what I meant to say. Are they safe electronically as they seem not very costly. I imagined they would cost much more than the prices I see on the internet. So if I buy a low-end power supply, will it work safely? Anyone have experince with these? See example: http://www.a1parts.com/tequipment/power.htm __________________ Zen, BOZ, BOZ-J, BLS, B1, Mini-A, Audio Sector NOS DAC, Gain Clone, F5, CAT5 Speaker Cable, DIY Allen Wright ICs, MOX II

25th September 2009, 06:32 PM	#4
Glowbug diyAudio Member Join Date: Feb 2006 Location: Hillsborough, NC/McLean, VA	http://surplussales.com/PowerSupplies/PowerS-5.html They always seem to have cool stuff Honestly, if I was in the market for an adjustable PSU, I'd probably wait to see when the next hamfest was...you can usually find great deals on older test gear. __________________ Jim J.

27th September 2009, 03:32 PM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	I have used a few Lab Power Supplies. I have never had a reliability issue. My present one is a rebranded version (RS) of a well known make that I bought secondhand. It is 2channel with adjustable voltage and adjustable current. The supplies can be used independently or series (with tracking) for 60Vdc or +-30Vdc or two @ 30Vdc. You can hear the relays switching as the voltage is adjusted to minimise heat dissipation on the output devices. It has a fixed 5Vdc as well. The current limit can be adjusted from ~10mA to 2000mA __________________ regards Andrew T.

30th September 2009, 12:23 AM	#7
star882 diyAudio Member Join Date: Mar 2007	It's surprisingly easy to build your own. __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

9th October 2009, 10:53 AM	#10
dangus diyAudio Member Join Date: May 2004 Location: Vancouver Island	See my post in this thread, if you're into building a supply. Once you've got the regulator, the rest isn't hard. Transformer, caps and rectifiers could come from a junked hifi receiver. http://www.diyaudio.com/forums/power-supplies/82332-diy-dual-lab-power-supply-post956942.html Here's a working link to the MC1466 data sheet: http://www.datasheetarchive.com/pdf-...dsa-409990.pdf [edit] 20 amps???!!! Doing that with a linear supply will be interesting... big transformer, big caps, lots of power transistors. Last edited by dangus; 9th October 2009 at 11:03 AM.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Parallel a dual power supply or two power supplies?	Thunau	Power Supplies	12	16th February 2007 05:21 AM
CRC Power Supplies	jleaman	Solid State	1	12th March 2005 06:51 AM
HV power supplies	santa	Swap Meet	0	17th January 2005 11:52 PM
50V power supplies, qty=2	kjunom	Swap Meet	0	27th December 2004 10:32 PM
Regulated Power Supplies for Low Power Amps	PTL60	Solid State	18	6th February 2002 07:24 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read