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Bellari RP562 hum

 
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ECC82
Voodoo Audiophile


Joined: 03 Jul 2012
Posts: 72
Location: The Netherlands

PostPosted: Mon Jun 26, 2017 2:32 am    Post subject: Bellari RP562 hum Reply with quote

Encountered the following problem: when increasing the Bottom knob volume there is also an increase in hum. Problem could be that the transformers are to close to the mainboard. Someone here who cured that problem?

73'
Chris
PA3TVI
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Voodoo Guru
VooDoo Site Admin


Joined: 23 Feb 2005
Posts: 716
Location: Down there on the right...

PostPosted: Sun Oct 29, 2017 9:25 am    Post subject: Reply with quote

Howdy Chris,
More then likely the problem is with the filter capacitors in the low voltage +-15V power supply. This is a common problem with the Bellari equipment. We have also had problems with the voltage regulator transistor in the high voltage power supply creating hum and noise.

Good Luck!
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ECC82
Voodoo Audiophile


Joined: 03 Jul 2012
Posts: 72
Location: The Netherlands

PostPosted: Thu Nov 02, 2017 11:24 am    Post subject: Reply with quote

Thanks, Voodoo Guru. I will certainly try to cure this problem. Think the Panasonic FC caps will bring improvement. Will have to check how many and what Pf/voltage is needed.
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