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1970
In the beginning
1976
GM8LWR
2000
December 2000
2001
300W HF Amplifier
2002
The 'shack' in 2002
2003
Winch Cable Woes
Transverters re-built
2004
Shack Revision 2004
2005
Half-Size G5RV
2006
18/24 Vertical
Upgrading the 23cm Transverter
Spectrian PA for 13cm
Keeping the Prime Mover Alive
First forays onto 9cm
GM0UHC is back on 4m
2007
MKII 9cm Transverter
A GPS Disciplined OCXO
Chasing an itch
GPS-Locked 9cm Transverter
A High Power UHF Power Meter
A better 4m PA
2008
A Replacement Soundcard Interface
Not a 23cm PA!
23cm Consolidation
13cm Transverter for GM0USI
The GM0UHC Brand Image
2009
Restoration of a MKI Racal RA17
The Wadley Loop Explained
Restoration of another MKI Racal RA17
A forced re-vamp of the 4m Transverter
DB6NT 1.3GHz Transverter MKU 13G2B kit
GM4CXM gets 13cm!
2010
Restoring an R1155 Receiver
Refurbishing a 1940's Air Ministry Headset
Transmitter Type T.1154M Ser. 85660
The Racal RA1217
2011
Racal MA.259 Ser. No. 1
R1155 Ser. 40696
A Home-Made J-Switch for the T.1154
Transmitter Type T.1154M Ser. 86102
2012
A Power Supply for the T1154/R1155
A Microphone Pre-Amplifier for the T1154
Another R1155 Restored
The Racal RA117
ISB Adapter type RA218
Custom Interface Unit
A Replica Screwdriver for the T1154
2013
Spanish A.D.8882B
Restoring two Vibroplex 'Bugs'
Is your RA17 a MKI or MKII?
Shack Refurb' 2013
1 Hour, 3 microwave bands!
2014
R.1155E Ser. 69428
A Modular Transverter for 3cm
R.1155L Ser. 0138
2015
The Racal RA117E
Systron Donner Spectrum Analyzer Type 809-1
The Racal RA137A
Racal MA251 Buffer Amplifier
The SA97 Wobbulator
The Racal RA37A
2016
PLL Upgrade for DB6NT MK2 13cm Transverter
9cm Transverter PLL Update
VLF Reception ... SAQ on 17.2KHz!
Rapco 1804P9 GPS Disciplined Precision Frequency Source
Updating my G3RUH GPSDO
S-Parameter Test Set for the SDR-Kits VNWA
The Racal RA1792
2017
Racal Sideband Adapters
The Racal RA98
The Racal RA63
The RA3700 Series
The RA3701 HF Receiver
What happened to 2017?
2018
LED Driver QRM
A Linear LED Driver PSU
The RA3712 Dual HF Receiver
You Just Have To Laugh
Collins R-390/URR versus Racal RA17L
Full Racks!
2019
The Racal RA121
The MA3752 Dual HF Drive Unit
The RA3702 Dual HF Receiver
The TA3762 250W Linear Amplifier
The MA3772 1KW HF Combiner
RA17 MKI Ser. N54
2020
A new 1MHz Osc. for the RA1217
R1155 PSU Addendum
Repairing a MKII Pye Black Box amplifier
Microdyne 1161-S Spectrum Display
To be or not to be ...
Systron Donner Spectrum Analyzer Type 809-1 re-fit
Repairing a troublesome ProSisTel Rotator
Systron Donner Spectrum Analyzer Type 809-1 - Solving the Frequency Calibration Issue
Refurbishing a Marconi CR100/2
RA17 L-C Filter problem solved!
Test Equipment for Test Equipment
Re-Stuffing Capacitors
Refurbishing a Marconi CR100/1
Computational Nostalgia
Network Analysers
RA17 MKII Ser. N2751
2021
The MA3752 driving a TA3762 PA
Using the Rigol DSA815-TG to align filters in the RA17 series
A low-cost Hand-Brake lever for Dirt Rally
A much-modified R1155
2022
Vicki 332
Yet another resurrected R1155
The MA79 Transmitter Drive Unit
Poor Man's MA350
Two Adret Signal Generators
2023
Hewlett Packard HP1740A Repair
Hallicrafters SX-28
Power Amplifier Type MM420
2024
RA117A N0959
How it might have been
Automatic Preselector MA1101A
HP 5065A Rubidium Vapour Frequency Standard
Racal TRA3755 DSP Transceiver
Racal RA66B Panoramic Adaptor
LF Converter Type RA237B
2025
World's First Transistor Radio
The Sinclair Slimline
Fully Loaded MA79G
HP 8920A Transceiver Test Set
The Sinclair Micro-FM
Transmitter Drive Unit Type MA79H
Decade Frequency Generator Type MA350B
The Racal RA1218, and more ... or, what happened to the RA1219?
My philosophy regarding refurbishing RA17s
C-type or Type-C
2026
RA217 + MA323 = RA329
Park Air Electronics 3030
Magnum 3AS0523 Braille Receiver
Park Air Electronics 3010
Park Air Electronics Series 3000 Summing-Up ... with a Happy Ending
RACAL
Restoration of a MKI Racal RA17
The Wadley Loop Explained
Restoration of another MKI Racal RA17
The Racal RA1217
Racal MA.259 Ser. No. 1
The Racal RA117
ISB Adapter type RA218
Custom Interface Unit
Is your RA17 a MKI or MKII?
The Racal RA117E
The Racal RA137A
Racal MA251 Buffer Amplifier
The SA97 Wobbulator
The Racal RA37A
The Racal RA1792
Racal Sideband Adapters
The Racal RA98
The Racal RA63
The RA3700 Series
The RA3701 HF Receiver
The RA3712 Dual HF Receiver
Collins R-390/URR versus Racal RA17L
The Racal RA121
The MA3752 Dual HF Drive Unit
The RA3702 Dual HF Receiver
The TA3762 250W Linear Amplifier
The MA3772 1KW HF Combiner
RA17 MKI Ser. N54
A new 1MHz Osc. for the RA1217
RA17 L-C Filter problem solved!
RA17 MKII Ser. N2751
The MA3752 driving a TA3762 PA
Using the Rigol DSA815-TG to align filters in the RA17 series
The MA79 Transmitter Drive Unit
Poor Man's MA350
Power Amplifier Type MM420
RA117A N0959
How it might have been
Automatic Preselector MA1101A
Racal TRA3755 DSP Transceiver
Racal RA66B Panoramic Adaptor
LF Converter Type RA237B
Fully Loaded MA79G
Transmitter Drive Unit Type MA79H
Decade Frequency Generator Type MA350B
The Racal RA1218, and more ... or, what happened to the RA1219?
My philosophy regarding refurbishing RA17s
RA217 + MA323 = RA329
T1154/R1155
Restoring an R1155 Receiver
Transmitter Type T.1154M Ser. 85660
R1155 Ser. 40696
A Home-Made J-Switch for the T.1154
Transmitter Type T.1154M Ser. 86102
A Power Supply for the T1154/R1155
A Microphone Pre-Amplifier for the T1154
Another R1155 Restored
A Replica Screwdriver for the T1154
Spanish A.D.8882B
R.1155E Ser. 69428
R.1155L Ser. 0138
R1155 PSU Addendum
Re-Stuffing Capacitors
A much-modified R1155
Yet another resurrected R1155
QSL Card Archive
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