external rectifier

Belkin F5D7050 External Antenna - Adding an external antenna to the Belkin F5D7050

Qsorder - Contest audio recording for N1MM. external "plug-in" which adds a QSO audio recording function.

TS-950S external control manual - Kenwood TS-950 digital external control instruction manual

Ten-Tec external tx control - Ten Tec Jupiter/Pegasus External Transmit Receive Control Expansion

FT-817 DC Circuit Protection - A schematic for a DX circuit protection for the Yaesu FT-817, provides protection from the external power supply overvoltage by DL2LTO in german

LinPac packet radio terminal - Linpac is an extensible Linux packet terminal that supports easy access to concurrent connections (streams), PBBS/FBB forwarding, and support for adding external commands

A high perfomance Crowbar Circuit - The MC3423 can protect sensitive circuity from power supply transients or regulator failure when used with an external "Crowbar" SCR.

6L6 Transmitter - 40 meters band 5 watts transmitter, uses a 6L6 with a 6X5 rectifier and a 0D3 voltage regulator tube on the screen.

Homebrew external speaker - PE1OPM home made external speaker project

Signalink USB Interface - Setup notes - Hints and Tips in using the Tigertronics SignalinkUSB External USB Sound Card and Interface