Site Map


Parent Page

Linked Page(s)

Parent Page

Linked Page(s)

Aerials and ATU Menu

Aerials and Feeders

Permeability Tuned Osc’r

Aerial Matching Unit

Aerials - VHF

PIC Applications Menu

Push Button Processor

Amplitude Modulators

Cleaning Old Components

Power Supply Menu

Power Supplies (HV)

Control Circuits

Power Supplies (LV)

Crystals and Filters Menu

Crystal Filters

PS-12M Re-engineered PSU

Crystals for IF Filters

Crystal Measurements

Progressive Rec’r Design

AF Amplifier

Crystals Photo

AF Filter

Crystal Pulling Range

Design Menu

Design Process

AM / AGC Detector

Historic Designs

Crystal Set

Kit Design (see * below)

Direct Conversion Rec’r

Progressive Receiver Design

Power Supply

Product Detector

Electromechanical Circuits

RF/IF Amplifier

Fault Finding Menu

Basic Fault Finding

Tuned Circuit Data

Commercial Equipment Repairs

Re-engineered Power Supply

Re-engineered Heathkit Units

Heathkit Projects/Information

Re-engineered Units

Aerial Matching Unit

Reforming Electrolytics

FM Module

IF Filters 1


IF Filters 2

New Control Knob

New Inductors

Solid State Circuits Menu

1  RF/IF Amplifiers

PS-1V4 Power Supply

2  RF Oscillators

PS-23 Power Supply

3  Linear LF Detectors

PSU-25 Power Supply

4  Active Filters


5  LF Amplifiers & Buffers

RF Switchbox

6  LF Oscillators

SB-101 Modifications

SB-101 Rebuild

7  RF Mixers

SB-101 Refurbishment

8  AM Detectors & AGC

SB-104 Modifications

9  H-Mode Mixers

SB301 Rebuild

10 Relay Switching

SB-401 Changes

11 High Dynamic Range Amplifiers

SB-Line Inductors

12 Electronic Switches

Spares and Repairs

13 Speech Processor

Station Console


SWR Bridges

15 FM Module

Valve PSU

16 Broad Band Transformer

Valve Transverter

17 Mixer Terminations

18 PIN Diode AGC System

19 Digital VFO

WARC and Other Bands

Sources of Information/Parts

Surge Limiter

Switch Wafer Repairs

Temperature Controller

Inductors and Tuned Circuits

Test Equipment Menu

Absorption Wavemeter


AF Distortion Meter

AF Oscillator

* Kit Designs

Active Mixers

Crystal Activity Meter

AF Amplifier

Crystal Calibrator

AF Filter

Digital LC Meter

AM Detector

Dummy Load

Basic Multimode Transceiver

Gate Dip Oscillator

Bidirectional Mixer

LC Bridge

Crystal Set

Logarithmic Detector

Digital Receiver

Modulation Meter

Direct Conversion Receiver

Noise Generator

Product Detectors

Off Air Frequency Standard

RF/IF Amplifier

Return Loss Bridge

Simple Transmitter

Scope Probe Information


Simple RF Detectors

Spectrum Analyser

LC Filter Menu

Bandstop Filters

Temperature Test Box

HF Bandpass Filters

Valve Tester

Quadrature Hybrid BPF

Typical Receiver Block Designs

Transmitter Filters

Useful Formulae

Useful Tools

Logarithmic Detector

Vackar VFO

Download Calculator

Low Cost Design

Valve Circuits Menu

Valve Circuits 1

Measurements Menu

FM Deviation Measurements

Valve Circuits 2

Rec’r Sensitivity Tests

Valve Circuits 3

Valve Circuits 4

Mechanics Menu

Control Knob

Valve Circuits 5

Indicator Dials

Valve Circuits 6


(B = Battery Valve Circuits)

Valve Circuits B1

Valve Circuits B2

Music Electronics

Valve Circuits B3

Painting and Lettering

Valve Circuits B4

Valve Circuits B5

PC Board Menu

PC Board Construction 1

PC Board Construction 2

PC Board Layout 1

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