How to suppress turn-off transient?

[hjames]

Hi all,
I'm using a single ended tube amp (wil EL 84) for the mid-high section of my system, turning this on is nice and smooth, but I get an awful transient burst when I turn the thing off. I've tried cleaning the switch contacts, it does not help. Now, I'm turning it on an doff by removing the mains plug, which is a little better but still gives a fairly loud transient. Is there anything that could be done to help moderate or eliminate this? Is there a possibility that it is due to the switch only and a replacement would be better than a cleaning? The amp is a second hand purchase, so I have no clue if it was doing the same when new.
Thanks

Have you contacted the manufacturer to see what info they offer?
I would sure start there - it looks like a nice audiophile Amp -
I can't imagine the builder would have designed it this way ...

looks like that would be http://www.aurexx.com

Ahh - I get "file not found" at that address - maybe they are out of business?

No - seems they mispelled it on the last page of the manual ...
The web address http://www.arexx.com/ works!

The Crystal tube amp is at - http://www.arexx.com/arexx.php?cmd=goto&cparam=p_aurexx

[grumpy]

Even a sparse forum:

http://www.arexx.com/forum/index.php?

I'd still guess the pop is from the power transformer (T1) field collapse
when the switch is opened.

A different type of mechanical switch might help, but as it is, I'd also
guess that this design just doesn't concern itself with this problem and
was aimed at being as simple and cost effective as possible.


Example/implementation of what I was attempting to describe:

http://www.arcdb.ws/D40/ARC_D40_schematic2.gif

C13 a .01uF 1600V cap (probably ceramic) between hot and neutral.
(bottom left of diagram)

If this doesn't help, at least it shouldn't cost much for a tech to add.