Greggo Posted January 25, 2017 Share Posted January 25, 2017 (edited) Technically a query about a guitar, but I'm wondering if anyone can help. I've just aquired a Hagstrom Ulstra Swede guitar which is HH with 1 vol, 1 tone and a coil split switch. The split coil sound isn't that great but a mod I would love to do is to rewire this switch if possible so it is a passive bass cut instead, in a similiar vane to the "dry-switch" that is found on Yamaha Revstar. Ive not been able to find a clear wiring diagram on how to do this online, I was wondering if anyone might know how to and what capacitors etc I would need? Thanks Greg EDIT: - AS soon as I posted I think I may have found the answer to my problem - using the bass cut wiring to replace the current coil split wiring Edited January 25, 2017 by Greggo Quote Link to comment Share on other sites More sharing options...
Beer of the Bass Posted January 25, 2017 Share Posted January 25, 2017 I don't have a diagram to hand, but what you want to do is put the cap in series with the signal wire, using one side of the switch to short across the capacitor. If you look up the circuit for the G&L PTB tone controls but substitute one side of your switch for the bass pot, that will get you there. I've had good results using a 2.2n capacitor for a variable bass cut (about 1/10 the value you would use for a standard tone control) , so somewhere in that range would be a good place to start. Quote Link to comment Share on other sites More sharing options...
Beer of the Bass Posted January 25, 2017 Share Posted January 25, 2017 That diagram will work, but I can't see that the 0.0033uF cap (3.3n) will do anything. You could cheerfully leave it out. Quote Link to comment Share on other sites More sharing options...
Greggo Posted January 25, 2017 Author Share Posted January 25, 2017 Thanks Ill check out the G&L PTB as well I have seen videos on someone using that before and it seems very useful. I'm assuming that the amount of cut will depend on the size of the cap being used? Quote Link to comment Share on other sites More sharing options...
MoonBassAlpha Posted January 26, 2017 Share Posted January 26, 2017 The treble cut switch in the top diagram needs a diagonal wire from the top left pole to the bottom right pole to give 2 different flavours of treble cut. Likewise, in the bass cut switch, the link at the top should be from top left to bottom right to do the same thing for bass cut. I think I've got this right! Feel free to correct me! Quote Link to comment Share on other sites More sharing options...
prowla Posted January 28, 2017 Share Posted January 28, 2017 Rickenbackers have a .0047 cap in series with the treble pickup; later models have a Vintage-Modern switch on a push-pull pot (Vintage = cap in series, Modern = bypassed). It's just an SPDT switch. Quote Link to comment Share on other sites More sharing options...
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