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Old 29th November 2010, 08:22 PM   #21
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Originally Posted by M Gregg View Post
spice,

I take it that the heaters are on when it fails?

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M. Gregg

do you meat the heating system in the house? it's winter now, so yes, and it did start acting like this when i got cold and i put my heat up, though i don't remember if that is directly connected in timing. But its working now and the heat is on, though the unit has been on for 2 days now. its an oil heater, do you think its messing with the circuit?
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Old 29th November 2010, 08:32 PM   #22
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do you meat the heating system in the house? it's winter now, so yes, and it did start acting like this when i got cold and i put my heat up, though i don't remember if that is directly connected in timing. But its working now and the heat is on, though the unit has been on for 2 days now. its an oil heater, do you think its messing with the circuit?
Uh, I'm pretty sure he's asking if the tubes are lit up when the sound stops
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Old 29th November 2010, 08:36 PM   #23
M Gregg is offline M Gregg  United Kingdom
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Lmao...

Yes I do mean are the tubes lit when it fails. LOL
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Last edited by M Gregg; 29th November 2010 at 08:40 PM.
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Old 29th November 2010, 08:36 PM   #24
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I can't find any info on where the b+ and b- points are
Is this Rosenblit's (Transcendent Sound) PCB, yours, or a knockoff? You could probably find B+/B- voltages by locating the last psu caps near the 4 diodes in your schematic.

Be careful...
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Old 29th November 2010, 09:04 PM   #25
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Uh, I'm pretty sure he's asking if the tubes are lit up when the sound stops
LOL... oh yes, the cathode heater...

yes they are lit
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Old 29th November 2010, 09:09 PM   #26
M Gregg is offline M Gregg  United Kingdom
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How long did the circuit run before it failed? Are we talking months, weeks, hours?
Before you had the first fail!
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What is the sound of one hand clapping?

Last edited by M Gregg; 29th November 2010 at 09:13 PM.
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Old 29th November 2010, 09:11 PM   #27
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How long did the circuit run before it failed?
about a year
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Old 29th November 2010, 09:17 PM   #28
M Gregg is offline M Gregg  United Kingdom
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It has got to be component fail.

so something you can try is to measure the current in the Gnd cable to the star point from the capacitors in the PSU with a multi meter.

Also measure this when the circuit seems good so you can compare it when it fails!
Please be careful HT bites!

Just for interest have you tried it in a different mains socket! Just a thought " I am thinking Gnd fault!

Regards
M. Gregg
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What is the sound of one hand clapping?

Last edited by M Gregg; 29th November 2010 at 09:31 PM.
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Old 29th November 2010, 09:33 PM   #29
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It has got to be component fail.

so something you can try is to measure the current in the Gnd cable to the star point from the capacitors in the PSU with a multi meter.

Also measure this when the circuit seems good so you can compare it when it fails!
Please be careful HT bites!

Just for interest have you tried it in a different mains socket! Just a thought!

Regards
M. Gregg
Ok tonight i'll measure gnd cable current between psu caps n star ground

I have it in a power conditioner where i have 8 or so other things plugged in, i have tried different sockets that i know work, but ill try using different wall sockets next time it fails.

whats most likely to fail? probably the chip right? hey uhhh yeah as i wrote that i put my hand on the chip in the psu with the enormous heat sink on it and its hardly even warm -_- it might be above room temperature only because 2 ele caps right near it are putting off heat. I don't remember that being the case when i built it... I mean why would there be a heatsink 100x bigger than the chip if it only got moderately warm? that seems like the likely cuplrit, no?

Last edited by spice house; 29th November 2010 at 09:45 PM.
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Old 29th November 2010, 09:34 PM   #30
M Gregg is offline M Gregg  United Kingdom
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I have to sign off now!

I am sure there will be others who will carry on! Catch you later!
If the other components are working then the socket / conditioner should be OK.

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M. Gregg
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What is the sound of one hand clapping?

Last edited by M Gregg; 29th November 2010 at 09:38 PM.
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