Technical

Published / by George Patterson

VK3YE RF Porta Tester

History of the receiving valve – AWV Dec 1957

Diplexer for the VK3RGC GARC repeater

A simple 2 metre vertical home station aerial

Multi-Band VHF Vertical Aerials

Thoughts on building your own receiver.

Pager Problems, cause and how to fix them.

Build your own 2m wide band 6 over 6 skeleton slot Beam aerial

Build your own 2m & 70cm wide band skeleton slot Beam aerial

Build your own Diplexer

Return Loss (VSWR) Bridge, and RF milli-voltmeter to 500 Mhz

A Bench Test Power Supply

A simple 2m 5/8 mobile aerial
MMANA-GAL is an aerial simulation program used by a number of GARC members.Below you’ll find some configuration files for this program.

A 2m folded Ground Plane
A simple 5/8 wavelength vertical for a Galvanized Iron Roof
A vertical 6 by 6 Skeleton Slot Beam for 2m, version 2
A vertical 6 by 6 Skeleton Slot Beam for 2m, version 3
A vertical 6 by 6 Skeleton Slot Beam for 2m, version 4
A 6×6 Skeleton Slot Beam for 2m and 70cm, Version 1
A Classic 6×6 Skeleton Slot beam for 2m, Version 1
5-8 wave vertical for 70cm
A 3×3 Skeleton Slot Beam for 6m
A 6×6 Skeleton Slot Beam for 70cm, Version 5
A 8×8 Skeleton Slot Beam for 70cm, Version 2

Eagle PCB is a PCB plotting package used by a number of GARC members. Below you’ll find some Eagle 6.2 circuit files as well as .png images.

AWV Dual Wave Battery receiver RA41, 1951.sch
AWV Dual Wave Battery receiver RA41, 1951.png

AWV BC battery receiver RB52, 1940.sch
AWV BC battery receiver RB52, 1940.png

Radiotronics Regenerative Receiver Jan1952.sch
Radiotronics Regenerative Receiver Jan1952.png

Radiotronics Low Distortion Lab Amp Jan1958.sch
Radiotronics Low Distortion Lab Amp Jan1958.png

Dual Wave Valve Receiver.sch
Dual Wave Valve Receiver.png

QST 1939 Bat Receiver.sch
QST 1939 Bat Receiver.png

AWA TaxiPhone MR3a.sch
AWA TaxiPhone MR3a.png

A wire gauge conversion chart to help decipher wire diameters