PV10AL Transformer burned, help!

Avantgarde · 24th November 2005, 04:31 AM

Hi

Currently i have a MV55 and PV10L bought together
from the importer and problem occurs when the biasing
lights is flicking and the light emmited out by vacuum
tube filaments is not constant, the spearker also give
out popping sound. I switched off the set and on it
back again and the set play well but after two songs
later the same problems come back again. I tried a few
times and the earth leakage circuit breaker started to
trip. I isolated the power ampand preamp and power
them up separately, the power amp biasing lights does
not flicker anymore. As for the preamp, it seems ok
and i let it on for 15 mins..when smoke started to
come out from the Transformer.

The transfomer is a Magnetek 783P2 and i cant find it in my country. Since there is no voltage indication in the transformer, i could not find other transformer to replace. Is there any body there to help me to advise what is the voltage require and what other brand of transformer i can use..thanks!

max29 · 30th December 2005, 10:03 AM

Magnetic 783P2 can be replaced.
you have 110v or 240V in singapore.

Avantgarde · 31st December 2005, 01:08 PM

Hi, thanks for your reply, we have 240VAC in Singapore.

senderj · 7th July 2006, 03:54 AM

Avantgarde,

Did you manage to find out the output voltage of the transformer? I am planning to diy a pv10a but don't know the voltage neither. If you did, please also let me know.

ethermion · 7th July 2006, 01:07 PM

Email magnetek at info@magnetek.it . They can send you a datasheet, and tell you where you might find one in .sg or .hk.

Keep in mind that the transformer smoked for a reason.

Avantgarde · 7th July 2006, 02:51 PM

Hi.. do you have the PCB layout of the PV10AL?? Thanks

24th November 2005, 04:31 AM	#1
Avantgarde diyAudio Member Join Date: Sep 2005	PV10AL Transformer burned, help! Hi Currently i have a MV55 and PV10L bought together from the importer and problem occurs when the biasing lights is flicking and the light emmited out by vacuum tube filaments is not constant, the spearker also give out popping sound. I switched off the set and on it back again and the set play well but after two songs later the same problems come back again. I tried a few times and the earth leakage circuit breaker started to trip. I isolated the power ampand preamp and power them up separately, the power amp biasing lights does not flicker anymore. As for the preamp, it seems ok and i let it on for 15 mins..when smoke started to come out from the Transformer. The transfomer is a Magnetek 783P2 and i cant find it in my country. Since there is no voltage indication in the transformer, i could not find other transformer to replace. Is there any body there to help me to advise what is the voltage require and what other brand of transformer i can use..thanks!

7th July 2006, 01:07 PM	#5
ethermion diyAudio Member Join Date: Apr 2005 Location: ffx station, va	Email magnetek at info@magnetek.it . They can send you a datasheet, and tell you where you might find one in .sg or .hk. Keep in mind that the transformer smoked for a reason. __________________ -e

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30th December 2005, 10:03 AM	#2
max29 diyAudio Member Join Date: Nov 2005 Location: oosterhout	Magnetic 783P2 can be replaced. you have 110v or 240V in singapore.

31st December 2005, 01:08 PM	#3
Avantgarde diyAudio Member Join Date: Sep 2005	Hi, thanks for your reply, we have 240VAC in Singapore.

7th July 2006, 03:54 AM	#4
senderj diyAudio Member Join Date: Feb 2006 Location: Hong Kong	Avantgarde, Did you manage to find out the output voltage of the transformer? I am planning to diy a pv10a but don't know the voltage neither. If you did, please also let me know.

7th July 2006, 02:51 PM	#6
Avantgarde diyAudio Member Join Date: Sep 2005	Hi.. do you have the PCB layout of the PV10AL?? Thanks

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