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Old 30th November 2010, 09:36 PM   #521
JimM is offline JimM  United States
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You can see circuit on post 279 and pictures of the amp on post 454, for cascode boards.
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Old 2nd December 2010, 04:28 PM   #522
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Here are some views of the completed power supply. To test without the amp what do people suggest. I'd like to see how much current and voltage I have so what about some light bulbs?
Regards,
Chris
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Old 2nd December 2010, 08:01 PM   #523
Zen Mod is offline Zen Mod  Serbia
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why voltage / current ?

measuring just voltage , using either variac or bulb-trick for first powering up , is completely sufficient for evaluation
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Old 3rd December 2010, 02:07 PM   #524
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OK I seem to be getting 25.3V on each rail.
I have read here that some of you have had some very hot thermistors but after 30mins since I turned the power supply on I can not feel the CL60s getting warm at all.
The diodes haven't even warmed up yet either. Mind you they are rated at 30A, 1200V each.
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Chris
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Old 3rd December 2010, 02:35 PM   #525
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do you have the outputs connected? Is it a burning amp?
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Old 3rd December 2010, 02:39 PM   #526
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Well I'm driving a couple of 100watt light bulbs on each power source and they are warm but no sign of burning. I'm going to have to wait for the BA2 boards before I can really put things to the test.
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Chris
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Old 3rd December 2010, 02:57 PM   #527
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by Backbones View Post
OK I seem to be getting 25.3V on each rail.
I have read here that some of you have had some very hot thermistors but after 30mins since I turned the power supply on I can not feel the CL60s getting warm at all.
The diodes haven't even warmed up yet either. Mind you they are rated at 30A, 1200V each.
Regards,
Chris
that's logical

you don't have power draw from PSU and everything must stay cold
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Old 3rd December 2010, 06:58 PM   #528
AndrewT is online now AndrewT  Scotland
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Quote:
Originally Posted by Backbones View Post
OK I seem to be getting 25.3V on each rail.
I have read here that some of you have had some very hot thermistors but after 30mins since I turned the power supply on I can not feel the CL60s getting warm at all.
CL60s in the primary feed? These pass mains Live. DO NOT touch them.
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Old 5th December 2010, 04:14 AM   #529
reytnz is offline reytnz  New Zealand
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Quote:
Originally Posted by Backbones View Post
Well I'm driving a couple of 100watt light bulbs on each power source and they are warm but no sign of burning. I'm going to have to wait for the BA2 boards before I can really put things to the test.
Regards,
Chris
You don't have to wait for the BA2 boards, you can test it using a dummy load...

This is just my approximation based on your test set-up, I presume the load light bulb is rated 100W ,230-240 volts, connected to your power supply output ~25Vdc, By deduction, bulb would draw ~10Watts, producing maybe a little glow in the bulb, The BA2 is expected to draw 300W at full blast bias, stereo. I would suggest to find a DC halogen lamp rated at 100W-150W (or equivalent say two 12 volts 50w-75w connected in series ) and connect as load to give your PSU a really good workout..
and also I'm a little bit worried with your air cooled diodes.

Last edited by reytnz; 5th December 2010 at 04:43 AM. Reason: adding more text
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Old 5th December 2010, 05:19 AM   #530
reytnz is offline reytnz  New Zealand
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Default 24Vdc 100-150Watts Halogen Lamp

I would suggest to find a DC halogen lamp rated at 24Vdc 100W-150W (or equivalent, say two 12-volts 50w-75w h/lamp connected in series ) and connect as load to give your PSU a really good workout..
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