Here is a photo of the stereo Pikatron ÜP3096 (1:15) D.I. box we made. Such a simple and great sounding too for all kinds of different needs! Plus it gave me a reason to break out the plotter cutter. Pika! Pika!
Please take care of each other.
One thing I noticed when looking at spring tanks is most of the small units are plastic. I happened to find three of these all metal vintage 1970 ones. Not shown; I refoamed the center dampener and freshened the glue attaching the transformer cores/coils. Here is also a 1970 IC amplifier magazine clipping making reference to these tanks.
On a side note have you ever looked up the history and science behind the spring reverb?
Please take care of each other.
UPDATE: I did fond a Local source of magnets with the correct polar pattern for DIY spring reverbs. (SM Magnetics)
Please take care of each other.
I built myself a piezo hydrophone. The metal ring used was kept from a disassembled camera lens. I sealed around the edges to make a box before casting the whole thing into resin.
Resin Tip: If you have a lighter handy you can quickly brush the flame over the surface to pop the bubbles during initial casting to avoid the bubbles seen in the bottom photo. 😉 But in this case I did not have one handy before the resin setup. Far as I can tell keeping them does not hurt the hydrophones function since it’s active side faces outward.