MacGregor Radio Control – 1964

Sole U K. Distribution by RIPMAX Ltd This new receiver replaces our Ivy Carrier Wave Receiver and Invistor unit which are now no longer available. As seen by the above illustration, the receiver is now completely different both in design and construction to the original two separate units. The new receiver is assembled on to a printed circuit panel and is much more compact. One obvious advantage in the construction is the fact that the valve is lying on its side. The circuit is also different from the original and no longer includes a quench coil, and the sensitivity coil has been replaced by a variable resistor. Once this is set, alteration is not normally necessary other than for adjustment due to voltage variation. There is a single tuning coil and the tuning itself whilst similar to the original receiver, is not nearly as critical. The transistors of the original Invistor are included in the new receiver to give a relayless output, and in addition, an extra silicon transistor is incorporated for temperature stability. However, if required, a low resistance relay may be used without alteration to the receiver. Current drain of both the H.T. and Ll batteries is extremely low, and in consequence the smallest batteries will suffice. Construction of the new kit is extremely simple, requiring the insertion and soldering only of the components into a printed circuit panel, which is clearly marked showing the position, reference and outline shape of each component. The printed circuit conductors are pre-tinned to facilitate soldering and as seen by the illustration, the components are well spaced, giving ample clearance between each soldered joint. The tuning and aerial coil, normally the most difficult operation for the beginner, is supplied already assembled and soldered to the printed circuit panel. This receiver, therefore, is an ideal beginner’s project and most suitable for medium size model aircraft and, of course, model boats. It can be operated by any of our carrierwave transmitters, and when both are used with the recommended batteries, will give ground range in excess of 600 yards. MACGREGOR LANGLEY – RADIO BUCKS CONTROL – ENGLAND SPECIFICATIONS: Size overall 373 xX 9” X 14” Weight 14 OZ. Receiver voltage H.T. L.T. 22: volts 14 volts Receiver current H.T. Under1 m/a 100 m/a Actuator voltage .. 6 volts max. Actuator current .. 500 m/a max. PLEASE NOTE: In order that the proposed constructor may ascertain whether this receiver is suitable for his intended purpose or if the construction is beyond his capabilities, we make the following offer: The illustrated booklet, as supplied in the construction kit, which deals fully with the assembly, testing, installation and operation of this receiver, may be obtained from your Retailer or direct from us, price 2/-, post free. @ In addition, this receiver can also be supplied as a works assembled and tested unit, at a small extra cost. Sole U.K. Distribution by RIPMAX Ltd 4g 5 OF | oy” & A single channel receiver which can be operated by any of our tone transmitters. The unit contains five transistors and does not require the use of a relay when coupled to a rubber or clockwork driven actuator, motorised actuator or small electric motor. However, if required, a low resistance relay may be used without alteration to the receiver. The receiver is not subject to swamping and can be operated by a transmitter with constant carrierwave and separate keyed tone or both keyed simultaneously. The choice of operating this receiver by a single or two-battery system offers practically complete freedom from pulse interference by small electric motors or relay contacts. The receiver is supplied sealed in a strong transparent plastic case complete with tuning tool and full instructions. To quote one well-known exponent of single channel radio—this is definitely a “‘fit-and-forget”’ receiver. SPECIFICATION: Case size overall Weight: .. – ” – we 2X18″ x2” 1:02. Receiver voltage (single battery) .. Receiver current . ss Actuator voltage tus bsaitaviae .. .. 14—6 volts max. Actuator current .. <3 .. 500 m/a max. MACGREGOR LANGLEY - 7 8—44 volts max. 1m/a approx. RADIO BUCKS CONTROL - ENGLAND PRICE LIST, JANUARY, 1964 Cancelling all previous lists CONSTRUCTION KITS Carrierwave Receiver MK Il £3. Assembled and tested 20s.0d. extra Terrytone MK Il Receiver ... - £5. 19. Assembled and tested 30s.0d. extra Carrierwave Transmitter MK Il £2. 19. Assembled and tested 30s.0d. extra Basic Tone and Carrierwave Transmitter MK II. Assembled and tested 30s.0d. extra Transmitter Conversion Components £1. 10. De-Luxe Con/Mod Transmitter £6. 10. Assembled and tested 30s.0d. extra Metal Instrument Case complete ... £2. COMPLETE EQUIPMENT Minimac Receiver £8. 19. Con/Mod Transmitter £8. 19. All-Transistor Transmitter ... £10.19. MACPACS as listed on separate leaflet MACGREGOR RADIO CONTROL