Kit makes an LED light up when the telephone is in use. Uses Power from phone circuit

Kit makes a Microphone preAmp circuit. works with 12 volt power supply 1 Left in stock and only Factory assembled(no kits)!

Kit makes a Condensor Microphone with preAmp circuit. works with 6-9 volt power supply

This circuit is very easy and fun to use. When the telephone line is on hold, this circuit enables music to play through the telephone! Special order only

Kit makes 5 LEDs light up when the telephone rings. Uses Power from phone circuit

Kit makes a 2 Watt Mono Power Amp. works with 3-12 volt power supply Currently available only assembled FA602

Telephone Privacy Potector

Kit makes a transmiiter to transmit telephone call on FM 88- 108 Mhz. Uses Power from phone circuit

Automatically Activates Recording device when the phone is picked up, Special order contact us for price & delivery