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Old 29th December 2011, 05:12 PM   #2261
Salas is offline Salas  Greece
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See if you have long cables to the regulators, put a capacitor across their inputs.
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Old 29th December 2011, 05:20 PM   #2262
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Quote:
Originally Posted by Salas View Post
Merlin see what's wrong feeding, grounding, or loading the regs. Something's fishy when two different ones give smoke.
I tested again the separate PSU and seems all OK

CLC, the last C is in the same quanghao reg 300uF
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Old 29th December 2011, 05:23 PM   #2263
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last C in the reg, BTW the cable between PSU & reg is 1 meter.
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Old 29th December 2011, 05:25 PM   #2264
Salas is offline Salas  Greece
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Using so heavy last capacitor, why? Are your fins insulated between them? Maybe they touch?
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Old 29th December 2011, 05:34 PM   #2265
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Ask again, did test with dummy first?
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Old 29th December 2011, 05:41 PM   #2266
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Quote:
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Using so heavy last capacitor, why? Are your fins insulated between them? Maybe they touch?
quanghao pcb caps are in parallel.

dvb-projekt connected without cap at the input reg.
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Old 29th December 2011, 05:42 PM   #2267
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Ask again, did test with dummy first?
No I did test with dummy load because burned, wich value in ohms & watts?
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Old 29th December 2011, 05:49 PM   #2268
vgeorge is offline vgeorge  Greece
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You burned the dummy load? 15k 10W is a good allrounder.
Also I think you know you shouldn' t test the regs without a load.
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Old 29th December 2011, 06:00 PM   #2269
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NO I didn't burned the dummy load. Yes I know it's necessary to use a dummy load or the circuit, but the Puresound phono MM was going on perfectly well with other 240VAC tx, I only changed the tx so I supposed that all will go OK that's the reason I didn't used a dummy load but the reg was connected to the MM.

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Old 29th December 2011, 06:09 PM   #2270
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Dummy load ready for next regs.
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Last edited by merlin el mago; 29th December 2011 at 06:16 PM.
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