First time ever wiring a guitar with piezos.
I would like to have one under the bridge. The other in the neck pocket. Would like them to be switchable so the wiring will be in parallel. Can I have both of these on at the same time or do I have to separate their outputs if they are wired in parallel? Us a on,off on switch.
I have a CBG i bought years ago at our annual Cigar Box Guitar Fest here in St louis. It has a single piezo with both volume and tone. The tone has a resister on the hot side and a capacitor on the ground. What is the best value of a resister and capacitor to use? And the pots, 1000k, 500K, 250K?
Thanks everyone.
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The back of the CBG has been open for years now. Just never decided to glue it back together. So i took a flashlight and looked at both the cap and resister. The cap is a standard 0.047. The resister looks to be a 10K ( brown, black, yellow then gold)
below is a gif I made to show how this is wired. Does this look right? It's sounds right, The tone control works. But still don't know what value the pot is.
Already made some mods. Not going to go under the neck pocket. I've had to shim up necks so this would put a gap between the piezo and wood. Moving it to the space usually occupied by the neck pickup.
Found this thread on the forum. Glenn includes a video showing the tone control to work better than the circuit in the CBG I have.
Passive tone control for piezo - solved
It has a few more components but not difficult to solder up. Lists and shows all the values of the components used. The circuit in my CBG works but is sporadic. I like bit because it cuts down on the harshness of the piezo.
I wired 2 piezo in parallel with 500k volume, but they were still a bit bright.
If you wire them to a 3-way toggle or blade switch, then you could play either or both in parallel. Ted made a good volume and tone circuit for these in the CBG wiring group that I haven't tried yet. It involves 2 - 1meg pots with .0022 caps on both pots.
The pot situation with a piezo works different than magnetic pickups due to the impedance. Mag pickups will get brighter with bigger value pots, but piezo's tame with the higher value pots. Weird.
Their brightness is why I'm looking into tone controls. The one made in this old CBG kinda works. I think it's on an audio taper instead of linear. But I'm going to keep it original. Because as is I can get a good tone from it.
Yep. Plan on having a three way switch.
I've always used the audio taper for volume and the linear taper for tone. On the round piezo and rod piezo that I've used, I've only used A500k or A1meg volume pots alone so far closer to the neck piezo position. Just been too busy to experiment with the tone circuits.
Hope you find one that works good for you.
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