Optical Detector Circuits

PGP RX built on perfboard

The original PIN diode receiver front end circuits by K3PGP. The upper circuit is a version for daytime and the lower one is for nightime use.

A modified version of the PGP receiver by F1AVY that has more gain, lower noise and greater low frequency responce.

A circuit by VK7MJ with greater audio bandwidth.

An ultra low noise receiver by F1AVY

A new ultra low noise design by F1AVY