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Percolator 2W Tube Amp DIY Kit http://zeppelindesignlabs.com/product/percolator-2w-amp-kit/ Built around a single 6AF11 NOS tube. Available with or without cabinet enclosure. Percolator 2W 1x8 Combo Tube Amp DIY Kit http://zeppelindesignlabs.com/product/percolator-2w-1x8-combo-assembled-finished/ Co...

You're right, I'm wrong. kslight, thanks for that post-link. I missed that before posting. We'll knock it off now.

No offence meant. Broadly speaking, I find some of the best discussions & problem solutions in threads that pick up and drop maybe several times over several years. These threads serve as an archive or repository of ideas-in-development. So I added my idea.

Aw shucks; does that say "2013"? I'm a bit dyslexic and thought it said "2018" and I was actually posting three years early! But seriously, what I feel really stupid about is that I managed to scroll past the pictures of the done deal. Doh! It looks like the project turned out fine, and I wish there...

Here's the schematic. The trick is to match the FET's very closely at Q1 & Q2.

We did try a few piezos and settled on this one for cost, availability and performance. It sounds pretty cool with this circuit. Here's a band we recorded entirely with these mics. https://soundcloud.com/zeppelin-design-labs/summertime-recorded-with-the-cortado-contact-mic We made a tin can mic for ...

If looks don't count, you could consider a balanced piezo contact pickup. We make this: http://zeppelindesignlabs.com/product/cortado-balanced-piezo-contact-mic/ (we call it the Cortado.) This comes as a DIY kit. We wired two piezos in parallel to the balancing / buffering circuit and stuck them to ...

We make an inexpensive piezo contact pickup with a balanced buffered output signal. http://zeppelindesignlabs.com/product/cortado-balanced-piezo-contact-mic/ It comes as a DIY kit so you can configure it just-right for this instrument. The signal is super-clean with very wide, flat bandwidth. You ca...

Several contact mics on the sound board to separate channels for sure. We make a low-cost balanced output contact mic. Here's some info: http://zeppelindesignlabs.com/product/cortado-balanced-piezo-contact-mic/ The mic needs phantom power but can then drive a super-clean signal down a long run of ca...

This is a pretty interesting discussion of a common problem. Our approach to making piezos really useful is a balancing / buffering circuit, originally designed by <a>Alex Rice</a>. The circuit balances the signal from the piezo for super-quiet signal, and matches the impedance to the recorder's inp...