No I remember having some from Tandy at that time and no difference. I could
vary it a bit by routing the cables of course, but also if I then placed a
hand on any connected item even if earthed to the mains, I could change the
level of it.

I suspect that the transmitter in question had harmonics oll over the place
and as I'm not far from the Thames as the rf flies, the whole wiring and
house was an aerial, and it just happened to be a coincidence that thee amp
had poor rejection at one of these.
The fact that the pioneer was fine seems to suggest there is better
screening less earth currents and possible better filtering.

It had little coils in the output stages, well quite big ones actually.
Nothing like that in the Tandberg just lots of heatsink.
Brian

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"Jim Lesurf" wrote in message
...
The clue was what you found re speakers. Chances are ferrite blocks on the
speaker leads would have helped.

Jim

In article , Brian-Gaff
wrote:
Try as I might with capacitors ferrites mains filters on everything
every night in the summer this q guy would be there at some point with
cryptic conversations. Eventually, I unplugeed every input and found
that the only way to not get it was to plug in the phones and remove
the speaker plugs, bot of them.

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