JP-11P-1 Input transformer

JP-11P-1 Input transformer improvement for electronically balanced input.

JT-16-A Improves Performance of SSM2015 Mic Preamp IC.

Provides 5 to 6dB better S/N, better common mode hum and buzz rejection and inceased RFI immunity.

JT-16-A Improves Performance of SSM2017

JT-16-A Improves Performance of SSM2017 Mic Preamp IC.

JT-MB-C Isolates

JT-MB-C Isolates both Mic and Line Inputs of Inexpensive Mixer.

JT-MB-C Mic Input Isolation for Mackie Mixers

JT-MB-C Mic Input Isolation for Mackie Mixers.

Build a Microphone Polarity Tester

When a single microphone is used to capture an instrument or voice, the absolute polarity of its output doesn't really matter. But it is common to use two microphones, especially with larger instruments such as a piano or maybe a small string section.

Microphone Circuit Test Oscillator

This unit would be mounted in a small plastic or preferably metal box, with a 9V battery, level control, a male XLR connector (same as on a mic) and a switch. Current drain is low, since the circuit only uses one dual opamp. There is no need for a high quality device, and a 1458 is all that is needed.

The Big-E Stereo Parabolic Microphone

This device is a stereo amplifier for a high sensitivity stereo parabolic microphone. It can be used for listening to distant sounds. This unit has a stereo audio path that helps produce more realistic sounding audio. It can be used with headphones or as an audio source for a stereo tape recorder or a PC sound card.

Micro Spy With FETs

Micro Spy With TTL