PDA

View Full Version : WTD - Leak 30 On/OFF Volume Switch


Xapito
19-11-2015, 11:39
Purchase one of these recently but sadly to find out that the volume switch has been messed with - the part that triggers the clicking on/off has been removed and the switch is now hardwired to be constantly in the ON position, volume control is also a bit messy as it is.

Was wondering if there's anyone with a donor unit who can provide this switch as the one I've purchased is basically in mint condition, it would be a shame if I couldn't keep it in my collection. :(

Thanks
Firebottle
19-11-2015, 12:15
Unfortunately it is the mechanical part of the switch that usually fails first.

What resistance value is the volume control, as others may have a suitable replacement even if it isn't originally from a Leak.
Look on the side of the volume control to see what markings there are.

:)
Xapito
19-11-2015, 12:26
Hi Alan, thanks for the input, I'm currently at work so I'm not near the equipment but looking at the service manual it's a 20K potentiometer.

This is a photo of it's current condition with the original wires tagged to each other:
https://db.tt/lzTi6h5N

Here's a original one, where you can see the missing rear black box of the volume potentiometer, the on/off switch I presume:
http://4.bp.blogspot.com/-dUI9n9bD8cM/U4jPbcR97UI/AAAAAAAADA0/X6vMn7kagFc/s1600/_5.JPG

Thanks
Xapito
23-11-2015, 10:33
Still looking :please:
spendorman
23-11-2015, 11:45
Perhaps get a complete amp off eBay for spares. Don't think that they go for much.
Xapito
23-11-2015, 11:51
Been looking at prices lately, waiting for the right one as postage makes it a bit silly for me to buy it only for a potentiometer. Last resort action, but a valid one indeed, thanks Alex!
Barry
23-11-2015, 11:56
http://www.ebay.co.uk/itm/5pcs-Stereo-B20K-20K-Ohm-Dual-Linear-Taper-Volume-Control-Potentiometer-Switch-/191726786070?hash=item2ca3ce9616:g:wTgAAOSwo6lWMmq m

Hurry!
spendorman
23-11-2015, 12:00
http://www.ebay.co.uk/itm/5pcs-Stereo-B20K-20K-Ohm-Dual-Linear-Taper-Volume-Control-Potentiometer-Switch-/191726786070?hash=item2ca3ce9616:g:wTgAAOSwo6lWMmq m

Hurry!


Says linear, surely log needed for volume control
Barry
23-11-2015, 12:03
Says linear, surely log needed for volume control

Oops! Didn't spot that. Sorry.
spendorman
23-11-2015, 12:08
Oops! Didn't spot that. Sorry.

Strange thing is that they call it a volume control, it may still be right, who knows.

Cricklewood Electronics may be worth trying.
Xapito
23-11-2015, 12:30
Yeah, those kind of doubts also assaulted my mind hence the search for a original one where I can take my soldering iron and go like for like. Thanks for that though..
spendorman
23-11-2015, 12:37
The Quad 33 uses a volume control with a combined switch, not sure what the value is though. Perhaps check those out.
Barry
23-11-2015, 13:24
The Quad 33 uses a volume control with a combined switch, not sure what the value is though. Perhaps check those out.

Yes they do - and there's one for sale here: http://www.ebay.co.uk/itm/Volume-control-potentiometer-pot-switch-for-Quad-33-preamp-pre-amp-preamplifier-/131515983470?hash=item1e9ef6a66e:g:pWsAAOSwPhdVGP2 8.

The ad dosen't quote the value, but I have looked at the schematic for the Quad 33 and it's 50KOhm; so probably of no use for the Leak.
Xapito
23-11-2015, 15:01
Yer, won't cut it.
Firebottle
23-11-2015, 15:13
Will make very little difference fitting a 50K in place of a 20K in the Leak circuit, I've just looked.

:)