"Don Pearce" wrote in message
news:4a0201a1.261152296@localhost...
On Thu, 9 Apr 2009 15:05:26 +0100, "Keith G"
wrote:


Noop. Simple checking with 3 different valves (out of 4 available)
demonstrates the problem to remain with the socket always. I suspect the
soldering or it just needs proper, tricky cleaning - the problem is that
its
PCB mounted, so not trivial to just swap it out and move on!! The nuisance
is that it pops and spits quite hard when its warming up and that ain't
good
on a Lowther! (Voice coils wired inside and out and one will fall off with
that sort of behaviour, apparently!)

Ah that is a different problem - a poor pin connection rather than
microphonics. As the valve moves the connection makes and breaks. It
could be a dodgy solder joint or - quite likely when you mount
something as heavy as a valve on a PCB - a fractured track close to
the socket. You will need a jeweller's glass to see that.


I suspect the soldering - the valve is question (6AU6) is about as light as
they come. It's a faff, but I'll flow the solder joints on the socket pins
to see if that clears it. I have been using an old (but nice) Pioneer SS amp
but that's got a bit noisy and hit and miss on the knobs now, so it's a
clean-up either way is why I was thinking of summat different like the
Gainclone for the time being!!


OK, I'm getting the idea - my initial thoughts were probably not to far
out
then: I suspected it was like shortening a dog's lead - the higher the
flux,
the shorter the lead. Which, I guess, is what give Lowthers their 'speed'
and supreme clarity - or, to put it another way, their entire *lack* of
'flubberiness'!


Unfortunately no - the forces and movements just don't work that way.


OK, I'll have to wait for Arnie's 'no upper case/no long words' explanation,
then - he's especially skilled at dealing with the *ignorant*...!!

:-)