Grissle Posted July 24, 2009 Share Posted July 24, 2009 I'd like to add a blend pot and then use a concentric pot for the vol/tone. Looking at the diagram it seems that I can run the leads from the pups to a blend pot and then from there follow the stock wiring. Am I missing anything or does this seem correct? I've posted this before with no results, I hope someone can help me out. Jag wiring diagram: [url="http://www.fender.com/support/diagrams/pdf_temp1/basses/0259505A/SD0259505APg2.pdf"]http://www.fender.com/support/diagrams/pdf...0259505APg2.pdf[/url] Quote Link to comment Share on other sites More sharing options...
The Bass Doc Posted July 24, 2009 Share Posted July 24, 2009 Can't see anything wrong with your proposal - do it and let us all know if you're happy with the outcome. Quote Link to comment Share on other sites More sharing options...
Al Heeley Posted July 24, 2009 Share Posted July 24, 2009 I had a shedload of problems rewiring a jazz bass with a blend pot a couple of years ago, seems the blend pots you get from most of the retain outlets on the net are not actually true blend pots, there is a drop at the mid point which causes a significant loss of volume, since the 2 pot tapers do not end at zero ohms in the centre, they sort of run a bit past midway before reaching zero. It became such a pain balancing the blend with volume level that it ceased to be a useful configuration. I must add this was a passive wired guitar and you can get perfectly functioning blend pot configs with active setups, its just getting hold of a true blend pot that doesn't give you the volume drop in the middle is a pain, no matter how much the outlets protest they are selling you true blend pots, many are not, so beware. Quote Link to comment Share on other sites More sharing options...
Grissle Posted July 24, 2009 Author Share Posted July 24, 2009 Interesting, thanks for the info. So do true balance pots exist that can be had by the public? Quote Link to comment Share on other sites More sharing options...
Al Heeley Posted July 25, 2009 Share Posted July 25, 2009 [quote name='Grissle' post='550670' date='Jul 24 2009, 10:50 PM']Interesting, thanks for the info. So do true balance pots exist that can be had by the public?[/quote] yES - i think Fender do them, John East was kind enough to send me a 'spare one' he had and that had none of the centre-position drop-off. I think its something you have to try; I was pretty disappointed it became such a struggle, and ended up going back to twin vols and master tone, the classic JB setup. Don't let me put you off experimenting! Quote Link to comment Share on other sites More sharing options...
Grissle Posted July 25, 2009 Author Share Posted July 25, 2009 (edited) Al Heeley, Big thanks again, I found these, [url="http://www.darrenriley.com/shop/cart.php?m=product_detail&p=1435"]http://www.darrenriley.com/shop/cart.php?m...tail&p=1435[/url] but not sure if they're what you were talking about? Edited July 25, 2009 by Grissle Quote Link to comment Share on other sites More sharing options...
Al Heeley Posted July 25, 2009 Share Posted July 25, 2009 yes, looks right, but these Allparts blend pots might state they're ok but most aren't. [url="http://www.allparts.com/store/electronics-250k-pots-ep-0385-000,Product.asp"]http://www.allparts.com/store/electronics-...000,Product.asp[/url] Not sure if you'll really know until you get a multimeter on it and check the residual resistance at the centre detente position. Quote Link to comment Share on other sites More sharing options...
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