Contents
of the Norcim club website…..
Remember https://norcim-rc.club for future
reading. Thanks!
SOME USEFUL LINKS… 
RCM+E
A non-Commercial website for interest
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Radio Control History and Electronics.
1.
History of the beginnings of the norcim website related to the founders of Micron Radio
Control in the UK 1970s.
2.
Visit map showing recent visitors to
the Norcim website….care of Statcounter.com.
3.
Links to other pages of the Norcim website.
4.
Fault finding notes regarding Micron receiver
kits of the seventies to nineties.
5.
Micron transmitter history and fault
finding notes.
6.
Micron dual conversion receiver
technical notes including circuit diagram and method of working.
7.
Vacuum de-soldering tool improvement
details.
8.
An R/C transmitter output tester
circuit for use at up to ten metres distance.
1.
Using the Micron FET receiver on the
40MHz band. Simple component value changes suggested.
2.
Micron transmitter details on 40MHz and the use of Futaba crystals.
3.
A word or two about Micron transmitter
output strength and how it can be measured.
4.
Compatibility of Micron transmitter
transmit sections with their various plug-in coder sections.
5.
Early integrated circuit servo
amplifiers using the World Engines WE3141 IC. Use of pot lube to prevent servo
twitching.
6.
Looking after your transmitter
telescopic aerial. A necessary maintenance using 27, 35, 40, and 72MHz
transmitters.
7.
Circuit of an ‘on board’ glow plug
energizer to allow heating of a four stroke plug at low revs. Better tick-over.
8.
Simple on-board circuit to detect the
charge state of receiver batteries.
9.
A circuit to power 2volt glow plugs
from a 12 volt battery for engine starting.
10. Alan Pratt talks about his PIC based encoder conversion of a
Micron transmitter.
1.
A 35MHz and 40MHz radio control
transmitter circuit.
2.
Electric powered V tail glider designed
by the late Barrie Allen.
3.
R/C receiver servicing tip from George
Beeler (NASA research labs).
4.
A historic experiment to determine the
effect of engine vibration on a radio control receiver.
5.
Words from Malcolm Perry about using
the 459MHz Radio Control band.
6.
Joystick wiring circuit used by many
radio control transmitters.
7.
A servo fail-safe details by Allen
Pratt.
8.
Mohamed Shiraz Kaleel
talks about D.I.Y construction of brushless motors.
9.
A tribute to the RCC Radio Control
Council of the UK. Also detail of UK. EU. And world radio control frequencies.
1.
Economy Electric Flight. Detail of
simple speed controller and inexpensive 540 size electric motor.
2.
Simple servo tester circuit costing
less that one UK£.
3.
Thoughts on Fast Charging of Nickel Cadmium and Nickel Hydride
battery packs. Basic circuit for -∆V cut off.
4.
Circuit for checking 27, 35, 40 and
72MHz Transmitter output at 10 metres distance.
5.
circuit for checking 2.4 Gig
transmitters from Dave1993 at RCGroups.com
6.
Possible constant current circuits for
charging Nickel Cadmium and Nickel-Metal Hydride battery packs.
7.
Simple relay switch circuit for
electric flight brushed motors.
8.
Lost model alarm circuit using an LM555
timer IC.
9.
Historic details of early Galloping
Ghost systems. Gallatrol transmitter details. Early
joystick mechanics. Receiver pictures. Model type. DIY actuator details using
the popular Mighty Midget geared electric motor of the 1950s.
10. Pulse proportional rudder systems (history) with suggestion of
modifications to reduce actuator (servo) current.
11. A circuit suggestion from David Caudrey for a fast rudder only pulser or a rudder/elevator for ‘Smoothed’ Galloping Ghost.
12. History of the first Analogue Feedback servos.
13. Suggested circuits that may have helped Analogue servos.
14. Automatic taper charge circuit for 2 volt glow plug batteries. (Lead
Acid sealed type).
15. Caravan security awning light. OK an odd input for the site but
some modellers do have a caravan. My excuse anyway!
16. A transmitter circuit from Randal Munroe. (Randal’s circuit
components will need much use of Google).
1.
Radio Receiver Testing (Now historic)
by the late R/C Guru, Dave McQue of Bletchley Park UK
and UK Radio Control Council.
1.
Brief History of
model control systems.
2.
The Doug Spreng
and Don Mathes digital control system.
3.
A seven channel digital transmitter
encoder circuit for radio control using easy to get parts.
4.
Plug-in channel mixer circuit module
for V tail and Delta model aircraft. Possible use with twin electric motor
model boats.
5.
Digital receiver encoder circuit using
easy to get parts.
6.
Another simpler digital transmitter
encoder from Harry Lial.
7.
A digital receiver decoding circuit
from Harry. Easy to get DIY parts.
8.
Comments on Airborne Radio Control
Equipment from the late Dave McQue. RCC Radio Control
Council.
9.
Thoughts on Single and Dual Conversion
radio control receivers.
10. Further thoughts regarding Single Conversion R/C receivers.
Norcim page 7 (This page tends to cover
commercial news and products)
1.
News from Micron
Radio Control a small UK based R/C company that began life 1969.
2.
Kymodel’s Lobmaster
radio control Fishing Boat Review. A ready to go package complete with all
radio control components.
3.
The Art-Tech ‘Wing Dragon’
ARTF flying model, complete with R/C equipment……Review.
4.
Flight Simulator
from Art-Tech Review.
5.
Inexpensive
precision engineered micro servos review.
6.
RFCandy….a superb electronics component
supplier using minimum postage charges.
7.
Just Engines…UK
supplier of model engines and accessories.
8.
Aerial
Photography?…you need to go to this site First.
9.
Review of the RadioLink 2.4Gig transmitter and receiver for radio control
models.
1.
Pictures from the Long Marston Airshow 2012. (Stratford upon Avon).
2.
Mike Hawkins Retro Valve Radio Control
equipment. With link to early valve circuitry.
3.
David Caudrey with his early 27 MHz valve transmitter memories.
4.
An early model aircraft using a two
valve receiver.
5.
The Hill Two Valve receiver details.
1.
Introduction of David Caudrey. Fellow
writer of the Norcim website. Includes background
history of UK radio control systems.
2.
Skyleader transmit section circuit.
3.
Skyleader coder circuit using Signetics NE5044.
4.
Skyleader Transmitter Nicad arrangement.
5.
Skyleader mains charger circuit.
6.
Skyleader servo circuit using the Mitsubushi
MC51660L chip.
7.
J.R. 35MHz transmitter section circuit.
8.
Micron 35MHz Competition receiver
circuit.
9.
Fleet 35MHz transmitter section
circuit.
10. Fleet XP NE5044 encoder circuit (basic).
11. Fleet XP joystick input circuits.
12. Fleet XP ancillary controls circuit.
13. Futaba AM 27MHz transmitter circuit.
14. Fleet motor switch circuit.
1.
In-Line Rx to Servo circuit. (produces
5volts). Original Design by DC.
2.
In line converter circuit for speed
controllers to work with the Futaba FASST 2.4Gigahertz system. Original Design
by DC.
3.
Digifleet XP-FM standard receiver 7 channel.
4.
digifleet XP-FM mini receiver
4 channel.
5.
Fleet servo circuit and PCB layout.
6.
Futaba 4 Chan FM ‘Attack’ transmitter
coder circuit.
7.
Futaba 4 Chan FM ‘Attack’ transmitter
RF transmit section.
8.
Mystery 27MHz AM transmitter circuit.
9.
Gallatrol Galloping Ghost transmitter circuit.
10. Interesting Valve signal generator circuit.
11. Proxxon mini circular saw
drive circuit.
12. Micron speed control circuit.
13. Receiver battery monitor circuit.
14. A -∆V (peak detect) charger for Nicad
and NMHydride batteries.
1.
A timed constant voltage battery
charger circuit.
2.
Simple LIPO battery charger circuit.
3.
A Zero Volts Drop Diode circuit.
4.
Testing Rig for brushed and brushless electric flight motors.
5.
Optical Sensor circuit for RPM.
6.
Frequency to Voltage conversion
circuit.
7.
Voltage to Current conversion circuit.
8.
Gating circuit for Digital Tachometer.
9.
50 Amp Shunt construction details.
10. Solar Garden Lamp circuit (for interest).
11. MacGregor transmitter coder circuit.
12. MacGregor transmit circuitry. (RF section)
13. MacGregor M23 six channel receiver notes plus circuit.
14. Another Mystery single channel Tone transmitter circuit circa
1960.
1.
Delta Peak Charger circuit for NICAD
and NIMH batteries.
2.
Charger circuit for 2 or 3 Cell LiPo batteries.
3.
A six cell commercial NC/NH charger
circuit.
4.
On-Board Receiver battery monitor.
5.
Micron Mini Receiver circuit.
6.
Micron speed controller circuit.
7.
Servo tester and speed controller
tester circuit.
8.
Movement detector circuit. Possible
speed gun for models.
9.
Nicad re-cycling circuit. Reduce memory effect of batteries.
10. 
A 50MHz frequency meter circuit.
1.
Excellent Hobby
Coverage from R/C Universe with video content.
1.
OPERATIONAL
AMPLIFIERS. Their use and applications.
2.
Fleet R/C systems
servo reverse and throw circuitry.
3.
A simple servo
throw and reverse circuit.
4.
An AC millivolt
meter circuit.
5.
Frequency to phase
converter circuit.
6.
Rate of change
circuit. -∆V Charger use ?.
7.
The Wien Bridge
circuit history and operation.
8.
Voltage to current
conversion circuit.
9.
Experimental charge
circuit based on 8 above.
10.
The non-inverting
Integrator circuit.
1.
A discussion about tuned circuits used
in radio Control.
2.
The Pi-network Filter matching circuit
in mathematical detail.
Norcim
page 15
DAVID CAUDREY’s in depth
look at discrete transistor amplifiers, both Bipolar and Field Effect (JFET)
types are covered In great detail.
Norcim page 16 (fragmented notes from the Norcim website)
1.
Peter Allen with a wonderful group picture
from Tasmania.
2.
Micron AM 27MHz receiver circuit.
3.
Layout of Micron’s PCB receiver.
4.
DC in thinking mode of the Micron Dual
conversion receiver.
5.
David Coles info re the Dorfler receiver.
6.
David Caudrey’s
reverse engineered Dorfler receiver circuit.
7.
A historic electrified Kiel Kraft
Ladybird.
8.
39… British model engine manufacturers
that have bitten the dust!
9.
Notes re the RCM+E Eaglet being
electrified.
10. D.I.Y. Anodising of engine parts. Great detail by David Coudrey.
11. Peter Gascoin’s conversion notes of a vintage
JR radio to 2.4MHz.
1.
Super Regenerative Receivers History.
(A David Caudrey Discussion).
2.
Technical details and working concept.
3.
Early Valve circuits.
4.
Gas filled valve circuit.
5.
Transistor super regen circuits.
6.
RCM+E magazine version.
7.
The early ‘IVY’ valve carrier wave
receiver details.
8.
The Hill Two Valve receiver circuit and
photo.
Norcim page 18 AM versa FM on early
27MHz and 35MHz radio control systems
1.
Comments about dual pulse proportional
systems (after Galloping Ghost).
2.
Notes about how ‘FM’ frequency modulation is done in Transmitters.
3.
Why are there no ‘Home Brewed’ radio
control systems now ?
4.
R/C Magazine advertising of yesteryear.
5.
Servo kits and DIY.
6.
Email from Peter covering his 2.4MHz
conversion of a JR transmitter and receiver.
7.
A modified West Wings Toucan model.
8.
Typical saga of ‘black wire corrosion’
.
9.
Is 2.4 Gigahertz R/C all it’s cracked
up to be ? …..a discussion from Barry Lennox.
10. 2.4 Gig problem from Michael.
11. Typical powerful commercial 2.4 Gig transmitters.
12. Mercury Bipe just built from 70 year old
kit. By David C.
13. Own design electric glider by David C.
14. Inside the model Rx aerials for 27,35, 72 MHz Barry Lennox.
15. plug-in crystals operation and notes.
1.
Another Mystery 35MH Transmitter
circuit !
2.
David Caudrey’s
Retro Receiver Project. An attempt to re-create a very early valve receiver but
with an interesting twist for power 
supply !
3.
RCS Mk11 Guidance System Receiver plus
schematics.
4.
RCS Mk11 Guidance System Transmitter
notes and schematic.
5.
Notes and findings of the above early
radio control system.
6.
Some early Valve Receiver circuits used
by manufacturers.
7.
A Retro-Receiver project by David Caudrey
with improvements that could have been used at the time.
8.
Ongoing notes and findings of the above
project as it developed.
1.
Georges Berry looks back to the ‘Single
Stick’ flying days and could we get back to R/C transmitter controls offering
the nearest thing to full size flying.
2.
Problems with single stick transmitter
layout.
3.
Possible solution to the above.
4.
Back to the joystick saga with thoughts
of an ‘electronic’ joystick with no moving parts !
5.
Electrifying Puppeteer ! A project of
replacing a 40 size glow motor with similar power brushless motor.
6.
A Newcomers Guide about the 2.4
Gigahertz Radio Control Band
7.
Some interesting facts about our well
used model control frequencies
8.
Spread- Spectrum radio control systems
by Guru Barry Lennox. The surprising history of 2.4Gig radio and its future is
discussed.
1.
John Whitehead’s Retro radio control
project. A taste of yesteryear.
2.
Some R/C model background of John
Whitehead.
3.
Thoughts about a DIY transmitter using
the 35MH R/C waveband.
4.
A novel method of circuit board
production using an Epson SX210 ink jet printer.
5.
DIY tips for etching a printed circuit
board.
6.
Using Overhead Projector film for PCB
production.
7.
Finished and assembled printed circuit
boards for the Retro transmitter.
8.
John’s simple four channel PPM coder
for the Retro transmitter with servo reverse.
9.
Update section for the ongoing project
above.
10. Emerging details of the exciting nordaveVTU.
Device for altitude assist in model aircraft. Dave Caudrey’s
latest invention (with a twist!).
11. Electric revamp of Vic Smeed’s ‘Tomboy
by David Caudrey
1.
A 2.4 Gigahertz transmitter output
detector. (Wave Checker Device). By David Caudrey.
2.
A micro ammeter project. (Capable of
measuring tiny current flow). By David Caudrey.
3.
A blast from the past…former Micron
customer updates vintage R/C transmitters with leading edge technology. By Paul
Luby.
4.
An analogue servo design that equals
the performance of the normal ‘digital’ versions. By Jean-Marie Piednoir.
5.
Superb Retro Galloping Ghost model
using up to date actuator and electronics. By Jean-Marie Piednoir.
1.
Increase the range
of your transmitter with an aftermarket high gain antenna ? Robert Coggan
discusses the implications.
2.
Converting a scale
Mustang slope R/C model to electric flight. David Caudrey’s
latest project.
1. The Flame Wheel F550 hexacopter from Brian Boyde.
(includes the Aldi Toy equivalent).
2. Further DIY anodizing notes from
David Caudrey.
3. Also Superman 2. You will be
astounded at the picture! Thanks to Rob Green.
4. Indoor flying infra-red
transmitter details from Georg Bohmeke.
5. Powered glider design. Georg Bohmeke.
6. Early proportional radio control
by Helmut Brus. A magical Era.
1. Using the Maplin microwave detector
for a 2.4 transmitter check.
2. Details of David Caudrey’s home-made air compressor for airbrush use.
3. ONE OF ROB GREEN’S LATER
PROJECTS IS A MODEL OF THE MAGESTIC AVRO VULCAN. (Remember the flying Superman!
Page 22).
4. Rob continues with some
construction detail of his Model of the 1909 Monoplane ‘DEMOISELLE’. Amazing
detail.
1. Returning back to the Maplin
Microwave Leakage detector for R/C transmitter testing (page 26).
2. David Caudrey’s
amplified 2.4GHz transmitter detector shows extreme sensitivity and range.
Clever and frightening if the microwave oven is working in the kitchen!
3. http://www.rfdiagnostics.com/ Thomas Budka’s RF
harvesting device shows just how effective the RF102A can be compared with the
best microwave diodes available.
4. Radio Control servo technology
has evolved and improved since the Spreng and Mathes PPM invention in the late 1950’s. however servos of
today still rely on the same old ‘Pulse Width’ variation. Shows how good the
idea was. A DIY PPM Servo Tester is shown that works not only old servos but
most present day servos sold with 2.4GHz equipment.
1. A look back to model aircraft in
the beginnings of the hobby. The great pioneers. The balsa wood construction
and paper tissue covering, also stuff called Dope. Early valve radio and
transistor developments.
2. RC groups.com provide an amazing
collection of early radio control equipment images dating back to when our
hobby began.
3. If you have a picture of your
early modelling days, or even Retro stuff, then please share it with us oldies
(or newbies!) for memories. Thanks!
1.
David
Caudrey looks back to the beginnings of our Radio Control hobby and vacuum tube
receivers.
1. First impressions flying the MjX Bugs 2
drone. GPS return to home and altitude hold. High range.
1. Memories of a lifetime in
aeromodelling by Chris. (Part 1).
2. Memories of a lifetime in
aeromodelling by Chris. (Part 2).
1. DRONE AND MODEL AIRCRAFT REGULATIONS
2020. David Caudrey looks at designing a
slope sourer model that could come in at less than 250 grams flying weight.
Also suitable for flat field use.
1. BACK TO THE FUTURE with a look at the advantages of
Single Triple Axis Joystick transmitter control for model aircraft,
helicopters, drones, cars, boats, robots. A long ignored system with great
ergonomic hand control advantages.
A look back at the Veron Police Launch
model boat. A reminiscing project by David Caudrey
to provide a reversing capability from a simple two channel radio control
system.
Jean-Marie
Piednoir’s look at the vintage UK Staveley
multichannel analogue Radio control system with very detailed electronic
circuits
David
Caudrey is presented with a box of vintage radio valves from an old friend and
revisits the Two valve Hill receiver. A
milestone in Radio Control History.
A page
of looking back at Model Radio Control of our lifetime. The 35 NHx band revisited. A 27 MHz FM radio control system. Input
and much feedback from Bob Everitt. More reverse engineering from David
Caudrey. Input from Mike Hausner on 250 grams model
flying with designs.
A David
Caudrey project ... Looking at a possible 459 MHz Valve super-regenerative
model aircraft radio control receiver. Initial Progress.
Details
of a vintage transmitter still in use today by Michael Robbins.
An early
dual proportional analogue receiver circuit from Michael Robbins.
David
Caudrey returns to LED household bulbs (lamps) with a reverse engineered
circuit.
Adrian Hiley comments on the Skyleader
transmitter coder circuit shown on page 9 of this website.
A Memory
page covering Micron Radio Control’s
contribution to the model flying hobby nearly 50 years ago.
Spread-Spectrum
RC Systems, How they started and how we got there. By Barry Lennox NZ.
Documents
of interest:-
Vintage Model Control Valve Circuits from Mike Hawkins.
Timer circuit for free flight electric models DC &
TT norcim.
David Caudrey’s Nucleonics website is
only a click away ! Now with more diversified content.
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