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Schematic diagram for a broadband QRP SWR metering circuit and SSB TRANSCEIVER 80M / 40M boster filter IF Radio

A schematic diagram for a broadband QRP SWR metering circuit for use in a QRP antenna tuner. One could simply hold a momentary DPDT switch down and watch the LED while tuning the capacitors of the antenna tuner for minimum or zero light.

tube amplifier Circuit

tube amplifier Circuit using LT1065, EL34, 1N4007, B40C3700, 1N4001

+5V 10A Regulator circuit

+5V 10A Regulator circuit using 7805 IC

The circuit Tv transmitter very simple

The circuit is very simple, it just has three transistors, but the transistor types have been changed for VHF/UHF transistors. You can use 2N2369, BSX19 or BSX20, or any small signal transistor with an “ft” of typically 400MHz or more. The transistor DC biasing is a little more tolerant to varying transistor types than the […]

Holden Rodeo circuit

Holden Rodeo circuit Holden Rodeo circuit diagram for Headlight Switch Relay Holden Rodeo circuit diagram for Headlight Switch Relay Make and repair holden rodeo The following wiring diagram shows Holden Rodeo Headlight Switch Relay. This consists of battery,  fuse,  relay SPST, and headlight Holden Rodeo Headlight Switch Relay Wiring Diagram Wiring headlight switch relay troubleshooting […]

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