Need some help to identify the humming toroidal transformer of my audiolab 8000a amplifier . Transfomer labels just says "Talema" Audiolab 9802-P1S2. My S.no is 207B88566 so it should be a B seried but not sure if it's a MKII or MKIII version (anyone knows??). 
There are a couple of threads here and here trying to figure it out so I just wanted to be sure if this ONE is the right one, a Talema toroidal transformer 21755-p1s02 225va 2x30v 2x3,75a ??
I really have not much familiarity with electronics and measurements to understand or figure it out myself...
There are a couple of threads here and here trying to figure it out so I just wanted to be sure if this ONE is the right one, a Talema toroidal transformer 21755-p1s02 225va 2x30v 2x3,75a ??
I really have not much familiarity with electronics and measurements to understand or figure it out myself...
There is a guy in 2010 with the same fault and same amplifier .
He got it replaced and-------- when he got it back the hum was even louder .
There are a large amount of modifications on different versions of the 8000A and serial numbers are 7 digits which don't correspond to your numbering and lettering.
The colour coding of the mains input transformer depends on the mains voltage --Blue is neutral .
He got it replaced and-------- when he got it back the hum was even louder .
There are a large amount of modifications on different versions of the 8000A and serial numbers are 7 digits which don't correspond to your numbering and lettering.
The colour coding of the mains input transformer depends on the mains voltage --Blue is neutral .
I have 4 browsers and various search engines on each ( no Google though ) hold on to I try and find the right one .
Noticed on Icecat it seems to be a problem even on some later versions ,one guy contacted Audiolab and they told him to fit a DC blocker that fixed it for him .
He narrowed it down to "dirty mains " in his case the flat screen TV was causing it.
But that might not fix it for everybody as another guy got his money back ( dated 2020 ) .
Now found a whole webpage of "humming " complaints from many posters on many different audio forums .
Some said --change the capacitors , others "ground loop" but the vast majority ended up admitting its the transformer(s).
Noticed on Icecat it seems to be a problem even on some later versions ,one guy contacted Audiolab and they told him to fit a DC blocker that fixed it for him .
He narrowed it down to "dirty mains " in his case the flat screen TV was causing it.
But that might not fix it for everybody as another guy got his money back ( dated 2020 ) .
Now found a whole webpage of "humming " complaints from many posters on many different audio forums .
Some said --change the capacitors , others "ground loop" but the vast majority ended up admitting its the transformer(s).
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