ead Posted August 8, 2012 Share Posted August 8, 2012 I'm considering a few options for a passive J style bass one of which is the EMG BQC control. This has a stacked Bass/Treble and stacked mid control pots leaving me one spare hole for volume and pickup blend For such a volume/blend stack what is a suitable pot (does one bit need to be logarythmic and the other linear - values etc.?) and how should it be wired up? All help welcome! Quote Link to comment Share on other sites More sharing options...
brensabre79 Posted August 8, 2012 Share Posted August 8, 2012 I think there is a Fender part for this, I'm not sure on the catalogue number though. Quote Link to comment Share on other sites More sharing options...
ikay Posted August 8, 2012 Share Posted August 8, 2012 Passive blend uses a stereo pot. Adding volume would effectively mean having three pots on one shaft. I'm not sure that they exist... Quote Link to comment Share on other sites More sharing options...
brensabre79 Posted August 8, 2012 Share Posted August 8, 2012 (edited) Yeah they exist, I have one on my Jazz bass they are deep though! And the East j-Retro has one too but thats much smaller than the fender one. This MEC one is something like it, but it has a switch on the bottom too... http://www.banzaimusic.com/MEC-M-88552-Stacked-Switched-Pot.html Edited August 8, 2012 by brensabre79 Quote Link to comment Share on other sites More sharing options...
ikay Posted August 8, 2012 Share Posted August 8, 2012 (edited) My bad, just found the Warwick/MEC one. Crikey that's one big pot! - [url="http://www.thomann.de/gb/mec_m88552.htm?sid=19016689f402e7a3e796f31208037ce2"]http://www.thomann.d...796f31208037ce2[/url] Edited August 8, 2012 by ikay Quote Link to comment Share on other sites More sharing options...
brensabre79 Posted August 8, 2012 Share Posted August 8, 2012 Yeah thats it, and you can bung a series switch on it as well f you're feeling adventurous! Don't ask me for the wiring diagram for that though!! There's lots on the interweb about wiring a blend pot the best way, wiring the volume as normal they are just all in a stack. Quote Link to comment Share on other sites More sharing options...
ead Posted August 9, 2012 Author Share Posted August 9, 2012 Cheers fellas. I'll investigate further. Still in the pipe dream stage though! Quote Link to comment Share on other sites More sharing options...
ead Posted August 12, 2012 Author Share Posted August 12, 2012 OK, not sure if I'll have the space for one of those. Is there a suitable pot with two stacked volume controls and do they just get wired up like two independent volumes? Quote Link to comment Share on other sites More sharing options...
ikay Posted August 12, 2012 Share Posted August 12, 2012 (edited) EDIT - As mart says below, use a regular 250k concentric stack pot and wire it up as two separate vols (sorry, what I posted originally about using a blend pot was complete rubbish!!) Edited August 14, 2012 by ikay Quote Link to comment Share on other sites More sharing options...
mart Posted August 12, 2012 Share Posted August 12, 2012 [quote name='ikay' timestamp='1344805524' post='1769439'] Use a regular 250k blend pot but wire it up as two separate sources as in the 'stereo' diagram here (3rd diagram from top): http://www.stewmac.com/freeinfo/Electronics/Pots/i-4137.html [/quote] But then what would you do with the two outputs? You'd have to link them together, in which case you're back with the traditional blend control, and no overall volume control. I'm sure the OP will find a stacked vol/vol pot which, yes, would just be wired up like two separate volume pots, like on the diagrams you'll find on the Seymour Duncan site. Quote Link to comment Share on other sites More sharing options...
brensabre79 Posted August 13, 2012 Share Posted August 13, 2012 [quote name='mart' timestamp='1344807176' post='1769483'] But then what would you do with the two outputs? You'd have to link them together, in which case you're back with the traditional blend control, and no overall volume control. [/quote] I think this will be just two volume controls, one for each pickup just like a normal Jazz Bass, except they are stacked. Quote Link to comment Share on other sites More sharing options...
mart Posted August 13, 2012 Share Posted August 13, 2012 [quote name='brensabre79' timestamp='1344858781' post='1770118']I think this will be just two volume controls, one for each pickup just like a normal Jazz Bass, except they are stacked. [/quote] Could you explain a bit more what you mean by this? Cos a standard blend control is only one pot, so as you dial it one way you turn one pickup down, while if you dial it the other way, you turn the other one down. So it isn't two volume controls - it's just one control affecting two volumes in a preset way. Quote Link to comment Share on other sites More sharing options...
brensabre79 Posted August 14, 2012 Share Posted August 14, 2012 (edited) Sorry I thought we were still using a stacked pot, having a volume for each pickup... Thats what I understood from the OP. A stacked pot (e.g. 2x 250k) wire one pickup to each of the stacks as you would a standard volume control for each pickup on a Jazz bass. Only they are stacked, not in different holes! Might be a bit fiddly though. Edit: I see you are thinking of a single control stacked pot. I am talking about the dual ones that have independant adjustment for each stack! Like the original Jazz bass which had two stacked pots, one for each pickup... http://www.stewmac.com/freeinfo/Electronics/Pots/i-3479.html So for example, top stack, neck pickup volume. bottom stack, bpu volume, like I said though, might be a bit fiddly getting the sound you want in a hurry, but wiring wise should be simples. Edited August 14, 2012 by brensabre79 Quote Link to comment Share on other sites More sharing options...
mart Posted August 14, 2012 Share Posted August 14, 2012 Ok, I see where you're coming from. Yep, a stacked vol/vol pot (with two independent controls) does seem best, albeit possibly fiddly, as you say. Quote Link to comment Share on other sites More sharing options...
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