Search found 13 matches

by swampnoise
22 Apr 2011, 20:26
Forum: Electric Guitar Rewiring
Topic: Inductor on tone pot?
Replies: 37
Views: 15504

Re: Inductor on tone pot?

You need more than 1.5H on a bass to get to the desired low mid frequency. You could of course use the smaller coil value & a bigger value cap (using the previously stated math) but this sounds different than a bigger coil & smaller cap. This effect has nothing to do with frequency, but with the ste...
by swampnoise
06 Oct 2010, 12:58
Forum: Electric Guitar Rewiring
Topic: noise in TLE2426CP rail splitter
Replies: 2
Views: 1450

Re: noise in TLE2426CP rail splitter

Thanks DR Nomis, That does clarify the situation quite a lot for me! It seems theres' no need to worry about it being too noisy with these specs, as my preamp does not have a lot of gain. At present I am working against a deadline building an electric upright bass & a relic telecaster. So when these...
by swampnoise
27 Aug 2010, 22:28
Forum: Electric Guitar Rewiring
Topic: Rewiring Fender Strat
Replies: 7
Views: 2693

Re: Rewiring Fender Strat

You could put the switch to use as a passive bass cut control to get old style rickenbacker jangle tones.
A standard 5 way switch will allow for 3 different styles of basscut. 2 positions will have to be the same, and just be a true bypass of the signal with no basscut.

Just a simple idea..
by swampnoise
20 Aug 2010, 20:58
Forum: Transistors
Topic: a case against the j201?
Replies: 19
Views: 26427

Re: a case against the j201?

Hey coldcraft, I think what RG means here is that there is simply a smaller variation in pinchoff/cutoff voltage in the low Vgs types than in the higher Vgs types. This makes biasing them less critical, but not necesarily better! For instance pinchoff in a J201 can vary from 0.3 to 1.5V, a differenc...
by swampnoise
20 Aug 2010, 12:58
Forum: Transistors
Topic: a case against the j201?
Replies: 19
Views: 26427

Re: a case against the j201?

I am not sure, but think the audio grade 2SK117 is lower noise than the general purpose 2SK246. Never had a noise problem with the latter though. You are probably right about low current and high internal impedance of the j201 interfering with transparency. Always thought it was just the low Vp of a...
by swampnoise
20 Aug 2010, 11:29
Forum: Transistors
Topic: a case against the j201?
Replies: 19
Views: 26427

Re: a case against the j201?

Years ago I started using 2SK246 as a replacement for the 2n5457 if I ran out of them. It turns out the 2SK246 is more consistent in Vp & Idss and plainly sounds better to me than the 2n5457. I use it a lot for active on board electronics & other applications where high headroom are desirable. Would...
by swampnoise
16 Aug 2010, 10:26
Forum: Electric Guitar Rewiring
Topic: Simulating Lower Value Pots?
Replies: 5
Views: 1799

Re: Simulating Lower Value Pots?

If you have a 500K volume in your guitar now, putting a 500K resistor parallel to the pot will simulate a 250K (when pot is turned fully open, as this method will not simulate taper).

If you put a 250K parallel to the 500K pot you are simulating a (theoretical) 166K pot.
by swampnoise
11 Aug 2010, 11:21
Forum: Electric Guitar Rewiring
Topic: suhr backplate silent single coil
Replies: 58
Views: 52158

Re: suhr backplate silent single coil

As long as the pickups are not inside, but above the dummy coil, things should be fine. If you lay the dummy coil on the bottom of a routing as deep as a pickup cavity, it will be under the pickups, as stratpickups sit raised in their scratchplate. If the pickup magnets will not form a core to the d...
by swampnoise
09 Aug 2010, 22:01
Forum: Electric Guitar Rewiring
Topic: suhr backplate silent single coil
Replies: 58
Views: 52158

Re: suhr backplate silent single coil

If your dummy coil is around your pickups, then you will get (a little) signal loss as the dummy coil is no longer just a dummy coil. It will start to pick up the strings out of phase, albeit at a very low output level. The inductance of the dummy coil will also get bigger, as there will be iron (al...
by swampnoise
07 Aug 2010, 08:56
Forum: Electric Guitar Rewiring
Topic: Inductor on tone pot?
Replies: 37
Views: 15504

Re: Passive mid scoop control

I would personally put the coil closest to ground and the cap closest to signal, but for frequency response this wouldn't matter. A 250k or even a 500k should work fine here. 1.5H = the standard value for the gibson varitone. I wouldn't go any smaller than this. If I would want to do a low mid scoop...
by swampnoise
06 Aug 2010, 14:49
Forum: Electric Guitar Rewiring
Topic: Inductor on tone pot?
Replies: 37
Views: 15504

Re: Passive mid scoop control

You could use a series (R) LC circuit from signal to ground, like a bill Lawrence Q filter or a Gibson varitone. This will give you a passive midcut. It works best with quite a large value inductor and a small value capacitor. If you have the space inside your guitar you could even use a cheap humbu...
by swampnoise
06 Aug 2010, 14:37
Forum: Electric Guitar Rewiring
Topic: suhr backplate silent single coil
Replies: 58
Views: 52158

Re: suhr backplate silent single coil

Beware! The backplate system works fine, but does not work very well for reverse wound reverse polarity pickups, like in the G&L Legacy! You need non rw/rp pickups for it to work correctly in every switch position. Otherwise it will cancel hum in some switch positions, and add hum in others.
by swampnoise
06 Aug 2010, 13:58
Forum: Electric Guitar Rewiring
Topic: noise in TLE2426CP rail splitter
Replies: 2
Views: 1450

noise in TLE2426CP rail splitter

I am currently developping an active bass preamp based on a pair of state variable filters. I need a voltage reference for the opamps. As the system uses 8 opamps (2 quads) and runs of a battery I want to keep the energy consumption down. A TLE 2426 rail splitter has a far lower energy consumtion th...