Simple P48 for electret mic capsules

simple p48 wiring with a single resistor and capacitor

Building a Simple P48 circuit for your electret mic capsule is as simple as it sounds. I put the following diagram together to help beginners better visualize how everything is connected to the XLR. How to wire up the Simple P48 to an XLR What mic capsules will work? The Simple P48 circuit works with … Read more

Some Fundamentals of Sound – Hi-Fidelity Mart News 1955

fundamentals of sound 1955

I saw this neat set of charts while perusing an old copy of the Hi-Fidelity Mart Newspaper from 1955. I am pack rat and hoarder of sorts. I collect all kinds of things, from different kinds of succulents, to records. While searching for records I often cool articles, stickers, pictures, and other stuff in the … Read more

Field Recording: Bird Song and Movement, through a metal fence with contact mics

birds on a fence thumbnail

Headphones Recommended I attached a pair of 35mm Contact Mics (via my DUAL OPA Impedance Buffer) to a metal fence at Gum Grove Park in Seal Beach and waited for some birds to drop by. I was mainly curious if the vibrations from the bird movement and calls passing through the fence would be enough … Read more

Building OPA Impedance Buffers

completed Alice Mini board

Hot air reflow is so much easier than I thought it would be. The trick to getting everything placed correctly is to eat a good breakfast and not drink too much coffee. I am using these OPA “Alice” circuits in the hydrophones, dual impedance buffers, and Sound Urchin XLR products. They use a high definition, … Read more

Field Recording: Croaker sounds on the first day of Spring 2024

Most Croakers are gregarious, community animals and make noise by way of oscillating their swim bladder as part of their spawning ritual. The swim bladder is a pocket of air inside most fish that helps keep them afloat and facing upright. Male croakers use this sound to attract females. Being the first day of Spring … Read more

POTAR Design Devices