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Page (Page 1)
- History of the beginnings of the norcim
website related to the founders of Micron Radio Control in the UK
- Visit map showing recent visitors to the Norcim website….care of Statcounter.com.
- Links to other pages of the Norcim
- Fault finding notes regarding Micron receiver kits of
the seventies to nineties.
- Micron transmitter history and fault finding notes.
- Micron dual conversion receiver technical notes
including circuit diagram and method of working.
- Vacuum de-soldering tool improvement details.
- An R/C transmitter output tester circuit for use at up
to ten metres distance.
Norcim page 2
- Using the Micron FET receiver on the 40MHz band. Simple
component value changes suggested.
- Micron transmitter
details on 40MHz and the use of Futaba crystals.
- A word or two about Micron transmitter output strength
and how it can be measured.
- Compatibility of Micron transmitter transmit sections
with their various plug-in coder sections.
- Early integrated circuit servo amplifiers using the
World Engines WE3141 IC. Use of pot lube to prevent servo twitching.
- Looking after your transmitter telescopic aerial. A
necessary maintenance using 27, 35, 40, and 72MHz transmitters.
- Circuit of an ‘on board’ glow plug energizer to allow
heating of a four stroke plug at low revs. Better tick-over.
- Simple on-board circuit to detect the charge state of
- A circuit to power 2volt glow plugs from a 12 volt
battery for engine starting.
- Alan Pratt talks about his PIC based encoder conversion
of a Micron transmitter.
Norcim page 3
- A 35MHz and 40MHz radio control transmitter circuit.
- Electric powered V tail glider designed by the late
- R/C receiver servicing tip from George Beeler (NASA
- A historic experiment to determine the effect of engine
vibration on a radio control receiver.
- Words from Malcolm Perry about using the 459MHz Radio
- Joystick wiring circuit used by many radio control
- A servo fail-safe details by Allen Pratt.
- Mohamed Shiraz Kaleel talks
about D.I.Y construction of brushless motors.
- A tribute to the RCC Radio Control Council of the UK.
Also detail of UK. EU. And world radio control frequencies.
Norcim page 4
- Economy Electric Flight. Detail of simple speed
controller and inexpensive 540 size electric motor.
- Simple servo tester circuit costing less that one UK£.
- Thoughts on Fast
Charging of Nickel Cadmium and Nickel Hydride battery packs. Basic circuit
for -∆V cut off.
- Circuit for checking 27, 35, 40 and 72MHz Transmitter
output at 10 metres distance.
- circuit for checking 2.4 Gig transmitters from Dave1993
- Possible constant current circuits for charging Nickel
Cadmium and Nickel-Metal Hydride battery packs.
- Simple relay switch circuit for electric flight brushed
- Lost model alarm circuit using an LM555 timer IC.
- 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.
- Pulse proportional rudder systems (history) with
suggestion of modifications to reduce actuator (servo) current.
- A circuit suggestion from David Caudrey for a fast
rudder only pulser or a rudder/elevator for
‘Smoothed’ Galloping Ghost.
- History of the first Analogue Feedback servos.
- Suggested circuits that may have helped Analogue
- Automatic taper charge circuit for 2 volt glow plug
batteries. (Lead Acid sealed type).
- Caravan security awning light. OK an odd input for the
site but some modellers do have a caravan. My excuse anyway!
- A transmitter circuit from Randal Munroe. (Randal’s
circuit components will need much use of Google).
Norcim page 5
- Radio Receiver Testing (Now historic) by the late R/C
Guru, Dave McQue of Bletchley Park UK and UK
Radio Control Council.
Norcim page 6
- Brief History of model control systems.
- The Doug Spreng and Don Mathes digital control system.
- A seven channel digital transmitter encoder circuit for
radio control using easy to get parts.
- Plug-in channel mixer circuit module for V tail and
Delta model aircraft. Possible use with twin electric motor model boats.
- Digital receiver encoder circuit using easy to get
- Another simpler digital transmitter encoder from Harry Lial.
- A digital receiver decoding circuit from Harry. Easy to
get DIY parts.
- Comments on Airborne Radio Control Equipment from the
late Dave McQue. RCC Radio Control Council.
- Thoughts on Single and Dual Conversion radio control
- Further thoughts regarding Single Conversion R/C
Norcim page 7 (This page tends to cover
commercial news and products)
News from Micron
Radio Control a small UK based R/C company that began
radio control Fishing Boat Review. A ready to go package complete with all
radio control components.
The Art-Tech ‘Wing
Dragon’ ARTF flying model, complete with R/C equipment……Review.
from Art-Tech Review.
precision engineered micro servos review.
RFCandy….a superb electronics component
supplier using minimum postage charges.
supplier of model engines and accessories.
Aerial Photography?…you need to go to this site First.
Review of the RadioLink 2.4Gig transmitter and receiver for radio control
Norcim page 8
- Pictures from the Long Marston Airshow
2012. (Stratford upon Avon).
- Mike Hawkins Retro Valve Radio Control equipment. With
link to early valve circuitry.
- David Caudrey with his
early 27 MHz valve transmitter memories.
- An early model aircraft using a two valve receiver.
- The Hill Two Valve receiver details.
Norcim page 9
- Introduction of David Caudrey. Fellow writer of the Norcim website. Includes background history of UK
radio control systems.
- Skyleader transmit section
- Skyleader coder circuit using Signetics NE5044.
- Skyleader Transmitter Nicad arrangement.
- Skyleader mains charger circuit.
- Skyleader servo circuit using the
Mitsubushi MC51660L chip.
- J.R. 35MHz transmitter section circuit.
- Micron 35MHz Competition receiver circuit.
- Fleet 35MHz transmitter section circuit.
- Fleet XP NE5044 encoder circuit (basic).
- Fleet XP joystick input circuits.
- Fleet XP ancillary controls circuit.
- Futaba AM 27MHz transmitter circuit.
- Fleet motor switch circuit.
Norcim page 9
- In-Line Rx to Servo circuit. (produces
5volts). Original Design by DC.
- In line converter circuit for speed controllers to work
with the Futaba FASST 2.4Gigahertz system. Original Design by DC.
- Digifleet XP-FM standard receiver
- digifleet XP-FM mini receiver 4
- Fleet servo circuit and PCB layout.
- Futaba 4 Chan FM ‘Attack’ transmitter coder circuit.
- Futaba 4 Chan FM ‘Attack’ transmitter RF transmit
- Mystery 27MHz AM transmitter circuit.
- Gallatrol Galloping Ghost transmitter
- Interesting Valve signal generator circuit.
- Proxxon mini circular saw drive
- Micron speed control circuit.
- Receiver battery monitor circuit.
- A -∆V (peak detect) charger for Nicad and NMHydride
Norcim page 10
- A timed constant voltage battery charger circuit.
- Simple LIPO battery charger circuit.
- A Zero Volts Drop Diode circuit.
- Testing Rig for brushed
and brushless electric flight motors.
- Optical Sensor circuit for RPM.
- Frequency to Voltage conversion circuit.
- Voltage to Current conversion circuit.
- Gating circuit for Digital Tachometer.
- 50 Amp Shunt construction details.
- Solar Garden Lamp circuit (for interest).
- MacGregor transmitter coder circuit.
- MacGregor transmit circuitry. (RF section)
- MacGregor M23 six channel receiver notes plus circuit.
- Another Mystery single channel Tone transmitter circuit
Norcim page 11
- Delta Peak Charger circuit for NICAD and NIMH
- Charger circuit for 2 or 3 Cell LiPo
- A six cell commercial NC/NH charger circuit.
- On-Board Receiver battery monitor.
- Micron Mini Receiver circuit.
- Micron speed controller circuit.
- Servo tester and speed controller tester circuit.
- Movement detector circuit. Possible speed gun for
- Nicad re-cycling circuit.
Reduce memory effect of batteries.
- A 50MHz frequency meter circuit.
Norcim page 12
Coverage from R/C Moment with video content.
Norcim page 13
AMPLIFIERS. Their use and applications.
Fleet R/C systems
servo reverse and throw circuitry.
A simple servo
throw and reverse circuit.
An AC millivolt
Frequency to phase
Rate of change
circuit. -∆V Charger use ?.
The Wien Bridge
circuit history and operation.
Voltage to current
circuit based on 8 above.
Norcim page 14
- A discussion about tuned circuits used in radio
- The Pi-network Filter matching circuit in mathematical
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)
- Peter Allen with a wonderful group picture from
- Micron AM 27MHz receiver circuit.
- Layout of Micron’s PCB receiver.
- DC in thinking mode of the Micron Dual conversion
- David Coles info re the Dorfler receiver.
- David Caudrey’s reverse
engineered Dorfler receiver circuit.
- A historic electrified Kiel Kraft Ladybird.
- 39… British model engine manufacturers that have bitten
- Notes re the RCM+E Eaglet being electrified.
- D.I.Y. Anodising of engine parts. Great detail by David
- Peter Gascoin’s conversion
notes of a vintage JR radio to 2.4MHz.
Norcim page 17
- Super Regenerative Receivers History. (A David Caudrey
- Technical details and working concept.
- Early Valve circuits.
- Gas filled valve circuit.
- Transistor super regen circuits.
- RCM+E magazine version.
- The early ‘IVY’ valve carrier wave receiver details.
- The Hill Two Valve receiver circuit and photo.
Norcim page 18 AM versa FM on early
27MHz and 35MHz radio control systems
- Comments about dual pulse proportional systems (after
- Notes about how ‘FM’ frequency modulation is done in
- Why are there no ‘Home Brewed’ radio control systems now ?
- R/C Magazine advertising of yesteryear.
- Servo kits and DIY.
- Email from Peter covering his 2.4MHz conversion of a JR
transmitter and receiver.
- A modified West Wings Toucan model.
- Typical saga of ‘black wire corrosion’
- Is 2.4 Gigahertz R/C all it’s cracked up to be ? …..a discussion from Barry Lennox.
- 2.4 Gig problem from Michael.
- Typical powerful commercial 2.4 Gig transmitters.
- Mercury Bipe just built from
70 year old kit. By David C.
- Own design electric glider by David C.
- Inside the model Rx aerials for 27,35,
72 MHz Barry Lennox.
- plug-in crystals operation and
Norcim page 19
- Another Mystery 35MH Transmitter circuit
- David Caudrey’s Retro
Receiver Project. An attempt to re-create a very early valve receiver but
with an interesting twist for power supply
- RCS Mk11 Guidance System Receiver plus schematics.
- RCS Mk11 Guidance System Transmitter notes and
- Notes and findings of the above early radio control
- Some early Valve Receiver circuits used by
- A Retro-Receiver project by David Caudrey with
improvements that could have been used at the time.
- Ongoing notes and findings of the above project as it
Norcim Page 20
- 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.
- Problems with single stick transmitter layout.
- Possible solution to the above.
- Back to the joystick saga with thoughts of an
‘electronic’ joystick with no moving parts !
- Electrifying Puppeteer ! A
project of replacing a 40 size glow motor with similar power brushless
- A Newcomers Guide about the 2.4 Gigahertz Radio Control
- Some interesting facts about our well used model
- Spread- Spectrum radio control systems by Guru Barry
Lennox. The surprising history of 2.4Gig radio and its future is
Norcim Page 21
- John Whitehead’s Retro radio control project. A taste
- Some R/C model background of John Whitehead.
- Thoughts about a DIY transmitter using the 35MH R/C
- A novel method of circuit board production using an
Epson SX210 ink jet printer.
- DIY tips for etching a printed circuit board.
- Using Overhead Projector film for PCB production.
- Finished and assembled printed circuit boards for the
- John’s simple four channel PPM coder for the Retro
transmitter with servo reverse.
- Update section for the ongoing project above.
- Emerging details of the exciting nordaveVTU.
Device for altitude assist in model aircraft. Dave Caudrey’s
latest invention (with a twist!).
- Electric revamp of Vic Smeed’s
‘Tomboy by David Caudrey
Norcim Page 22
- A 2.4 Gigahertz transmitter output detector. (Wave
Checker Device). By David Caudrey.
- A micro ammeter project. (Capable of measuring tiny
current flow). By David Caudrey.
- A blast from the past…former Micron customer updates
vintage R/C transmitters with leading edge technology. By Paul Luby.
- An analogue servo design that equals the performance of
the normal ‘digital’ versions. By Jean-Marie Piednoir.
- Superb Retro Galloping Ghost model using up to date
actuator and electronics. By Jean-Marie Piednoir.
Norcim Page 23
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.
Norcim Page 24
1. The Flame Wheel F550 hexacopter from Brian Boyde. (includes the Aldi Toy equivalent).
Norcim Page 25
2. Further DIY anodizing notes from
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.
Norcim Page 26
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!
4. Rob continues with some
construction detail of his Model of the 1909 Monoplane ‘DEMOISELLE’. Amazing
Norcim Page 27
back to the Maplin Microwave Leakage detector for R/C transmitter testing (page
Caudrey’s amplified 2.4GHz transmitter detector shows
extreme sensitivity and range. Clever and frightening if the microwave oven is
working in the kitchen!
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.
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
Norcim Page 28
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
2. RC groups.com provide an amazing
collection of early radio control equipment images dating back to when our
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!
David Caudrey’s Nucleonics website is only a click away ! Now with more diversified
content. Worth a visit.
Miscellaneous documents of possible interest :-
is using your Radio Control Frequency ? A list of commercial and industrial devices that
use your Radio Control Frequency.
Vintage Model Control Valve Circuits from Mike Hawkins.
Newcomers guide of 2.4 Gigahertz model control. A simplified non-technical document listing
the many advantages of using 2.4 GIG equipment.
the originator of this norcim website… my real name is Terry Tippett
but I often use the word ‘norcimguy’ to associate
with the website.
The UK Free Light Bulb Fiasco how people in the UK were charged a billion pounds
for Free energy saving light bulbs that didn’t work !
Life Concerns. The beginnings of chatter about the end of life and the help
that could be available.
solution but expensive.
UK solution to end of life.
http://www.finalexit.org/final-exit-book.html a DIY alternative providing no
other person helps.
Dying massive groundwork done by this UK charity from early days with Sir
Ludovic Kennedy (wife Moira Shearer). Sir Terry
Pratchett and Sir Patrick Stewart together with many other eminent patrons are
Genocide began in
And now restarted
in September 2015. Has proved to be a barbaric method.
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