|
Post by flateric on May 9, 2010 9:03:11 GMT -5
Little module I was working on this morning: Its a small capacitor switching pcb, comnnected to a 4-way rotary switch. By replacing the stock capacitor in your circuit with the black & brown leads you can select 4 different combinations of capacitor to give (in this example) a range from 0.68uF down to 0.05uF. You can shove this into any circuit you want to mod - this will go into a tubescreamer circuit to replace the stock 0.047uF input cap, and give 4 different levels of bass boost. You could of course use the same little module to replace the tone cap in your guitar.
|
|
|
Post by newey on May 9, 2010 9:13:38 GMT -5
|
|
|
Post by sumgai on May 9, 2010 12:33:46 GMT -5
♭eric, I think you're gonna find that the tone control within most guitars is a treble cut, which is a bit different from a bass boost. Now I'm sure you were talking about your circuits (one or more of 'em), but a moment's cogitation reminds us that guitar tone controls use values hovering around 0.022mfd to 0.05 mfd. And that last one is considered by most players to be dark, mellow, jazzy or just plain muddy. Going up to as much as 0.68mfd is probably gonna make the pot itself useless, unless it's a no-load type..... in which case the results will be full on (max treble) or full off (min treble) at 9.5 on the knob. Again, I've no doubt that this may work well, and be quite useful to the player, in some of your circuits. But in a guitar or a bass, well.... let's just say that I'm waiting for confirmation one way or the other. And I suspect that you know where I'm laying my money on the betting table, eh? Otherwise, nice piece of work. But I must ask, do you realize that you're one coil short of a Varitone circuit? Modularizing that, with the proper component values, would be a guaranteed "instant sell" almost anywhere on the Internet. HTH sumgai
|
|
|
Post by flateric on May 9, 2010 15:14:46 GMT -5
yes - please note the values I quoted above are specifically cap values aimed at the tubescreamer input cap mod, the stock 0.047uF cap gives the characteristic mid boost of the ts808 by cutting the bass. Extending the value up to 0.68uF lets bass thru down to bout 40Hz, around 0.47 screens frequencies below 72 if i recall correctly.
|
|
|
Post by gumbo on May 10, 2010 7:54:47 GMT -5
Now, I know that I'm admittedly thinking about one specific guitar because I've got one, but I wonder whether the rear trem springs rout (say) of a Strat could contain either a means of 'plugging in' caps of varying value to some form of receptacle, or even a much-miniaturised version of the module proposed... ...late at night here (which it is here right now) this thought appeals as a means of 'trying' differing values when pups, etc are changed out....a way to achieve this without having to take the entire guitar apart, plus maybe even a way to disconnect the 'module' after final selection is made and replace with just the cap of the chosen value... ...dunno...just some thoughts... ...it is late...
|
|
|
Post by newey on May 10, 2010 8:01:56 GMT -5
Gumbo-
Easier still is to make a cap substitution box and do the testing external to the guitar. We've had a discussion on that somewhere around here . . .
|
|
|
Post by flateric on May 10, 2010 15:49:59 GMT -5
I've always found the swapping out of tone caps on guitars somewhat disappointing, always returning to the stock ones and using the tone knob to limit the brightness. However, it really makes a huge difference on active devices like pedals where there's a gain stage.
|
|
|
Post by gumbo on May 11, 2010 4:18:02 GMT -5
roger, Roger!
:-)
|
|