Toroidal positioning

[Mankysteve]

Would this position be too close to power lead and speaker leads?. I can always move the speaker posts. and move the Toroidal to there what do you guys and gals think?

Thanks in advanced

 

[Mankysteve]

Opps forgot image link.

 

[pacificblue]

It should not give trouble, but that depends on the toroid. I've seen things cramped much nearer together, the transformer nearly touching the PCB without problems. Others can't seem to get their amps hum-free with a transformer anywhere in the same case.

 

[Mankysteve]

Well ill give it go if it doesn't work ill start looking for a new case.

 

[Mankysteve]

No right channel at first. Although turned out to be a dry solder joint on the selector circuit board go figure.

Needs some improvements though. Ground leads need a proper connection to the chassis,

I had to extend one of the the signal input cables so that need replacing with a proper equal length connections.

I accidentally ordered a euro out rather than an in cable so at the moh power is hard wired in. So that needs doing as well, oh yeah and securing down the transformer.

Any UK sourced attenuator suggestions?

 

[AndrewT]

Hi,
toroids can sometimes send flux out that peaks in a few directions rather than exactly evenly all the way around.

These peaks can interfere with the cables around your amplifier and the traces on the PCB.

You can experiment with the orientation of the toroid to find a null that minimises the toroid flux effect on the two amplifiers.

To do this you need longer and more flexible leadouts on the transformer.

Any excess length can be cut off and/or dressed into corners/locations where least interference is heard/measured.