Our home My family Hobby 23cm PA HF PA SWR bridge Upgrade dynamotor Vintage ( valve) portables Avionics / WW2 equipment Mechanical stuff The shack Flying Our dogs

The Shack In the center the BBC-Marconi broadcast mike from 1937

Herman van Rees, PA0VRE With transistors BFQ 68 and BFQ 136 (ON921) you can build up a medium power amplifier with a gain of about 15 dB and an output power up to 4 Watt (1-dB compression …

This bridge is a resistive wheatstone bridge with a balun in the middle of the symmetric bridge to adapt and connect to the asymmetric detector.

The anode current is adjustable at the frontpanel, the meter-scale and other front-panel text is home made with special software made by F5BU called GALVA. It is freeware and downloadable on his …

The receiver has a diode mixer as input stage and transistorized IF & AF stage The transmitter is 100% equipped with sub miniature valves exc. the PA which contains a 2E22 octal valve ( =option ) The …

Select a set from this list Semafoon Escort Philips 8MR320 Philips SDR314 Telefunken Teleport 2 Telefunken Teleport 4 Siemens valve portable Motorola Handy talky ...

First portable 100% equipped with (germanium) transistors 146-174 MHz Ptx is 200mW

PA0VRE Herman's hobby space E-mail: herman@van-rees.nl

Herman van Rees, PA0VRE Met de transistors BFQ 68 and BFQ 136 (ON921) kun je een medium power versterker met een versterking van ongeveer 15 dB en een uitgangsvermogen van ongeveer …