Welcome to my technical web site which is dedicated to RF Communications, Test Equipment and related topics in both old and new technologies plus a few non-electronic ideas. New items are regularly added and subject related items are grouped within the highlighted fields for ease of access and future expansion. A number of example PCB layouts have been added to their respective circuit pages.

The site map shows the relative positioning of all pages on this site.

If you have any questions or comments on the contents of this site please email me at G3OOU(at)AOL.COM - replace (at) with @ when emailing.

Bob F Burns G3OOU - Electronic Design Centre

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1. Unless otherwise stated, all items on these pages are copyright R F Burns 1999-2018 but may be used by private individuals for non-commercial applications.

2. These web pages were last updated on 21 March 2018.

3. This web site was built with Serif Web Plus X8 and does not use any cookies.

4. This and the associated radio club site undergo continuous development so please enter each site via their respective home pages and check and update your bookmarks - page refreshes (F5) may be required.

5. Some of the processes described in these pages make assumptions about the skills and tools required to carry them out. If in doubt seek help before you start.

Aerials & ATU Menu

Mixer Terminations

Solid State Circuits Menu

Amplitude Modulators

Music Electronics

Sources of Information and Parts

Cleaning Old Components

Painting and Lettering Panels

Surge Current Limiter (U)

Control Circuits

PC Board Menu

Switch Wafer Repair/Rebuild

Crystals and Filters Menu

Permeability Tuned Oscillator

Temperature Controller (U)

Design Menu

PIC Applications Menu

Test Equipment Menu

Heathkit Projects / Information (U)

Power Supply Menu

Typical Receiver Block Designs

Inductors & Tuned Circuits

Progressive Receiver Design

Useful Formulae


Re-engineered Heathkit Units (U)

Useful Tools

LC Filters Menu

Reforming Electrolytic Capacitors (U)

Vackar VFO

Measurements Menu

Simple RF Detectors

Valve Circuits Menu

Mechanics Menu (U)


Bob F Burns  


Amateur Radio Callsign G3OOU

G-QRP Club Member 6907

Instructor and registered RSGB Assessor

Newsletter Editor - Crystal Palace Radio & Electronics Club

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Best wishes