Sorted: Mains hum on budget turntable...
In article , Keith G
writes
"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 12:21:01 +0100, "Keith G"
wrote:
"Don Pearce" wrote in message
. ..
On Wed, 30 Aug 2006 11:30:34 +0100, "Keith G"
wrote:
Forget all the theories Don, it was a short either in the cart or the
wiring. No amount of 'waveform analysis' was going to beat a bit of
tapping
about with a fingertip here....
Whatever it was , it wasn't a short in anything - totally wrong set of
symptoms.
I disagree, the hum started when there was lateral force on the stylus -
suggesting an internal problem stemming from cantilever movement. If not a
'dead short' then summat near enough to induce hum.
No - that would have resulted in a very different sort of buzz - you
would have heard the rapid connection and disconnection noises, and
they would have modulated the sound. None of that was happening. And
shorts don't induce hum - they make the signal stop.
Right this moment I can tap the wires on my V15/V and it will hum, tap it
again and it stops - on and off like a bathroom light. No buzz, no
'disconnection noises'....
Thats a different sort of umm.. humm.....
--
Tony Sayer
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