Name: Rainbow Joystick & Sound Interface more
Manufacturer: Rainbow Electronics
Price: £24.00
Blurb: Programmable joystick interface with sound. Sound amplifier to boost your output.
Source: Sinclair User May 84

Name: Ramlok more
Manufacturer: Adapt Electronics
Price: £8.00
Blurb: Device to stop the dreaded Ram-Pack wobble. Replaces the standard user port with a gold plated edge connector, complete with mechanical fastenings to hold interfaces tight.
Source: Sinclair User Feb 83

Name: Ramlok II more
Manufacturer: Adapt Electronics
Price: £6.00
Blurb: Stop the dreaded 'wobble' with interfaces. Includes improved edge connector.
Source: ZX Computing Dec/Jan 84

Name: RamPrint Interface more
Manufacturer: Ram Electronics Ltd
Price: £34.95
Blurb: Printer interface. Centronics compatible. Built-in word processor (RamWrite). Joystick port.
Source: Your Sinclair Jan 87
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Name: RamTurbo Interface more
Manufacturer: Ram Electronics Ltd
Price: £22.95
Blurb: Turbo Charge Your Spectrum ! so the advert said...
Rom cartridge slot that took the Sinclair cartridge games such as Jetpack, Cookie and Horace. The twin joystick ports could support Kempston, Cursor or Sinclair. A small reset button on the side was held down on boot to select Kempston/Cursor.
Source: Sinclair User May 84

Name: RD Adaptor more
Manufacturer: RD Labs
Price: £9.50
Blurb: Adaptor board to allow you to connect the Digital I/O, Analogue and Clock interface.
Source: Sinclair User Jan 83

Name: RD Anologue I/O more
Manufacturer: RD Labs
Blurb: Anologue I/O port. Requires RD Adaptor.
Source: Sinclair User Jan 83

Name: RD Clock more
Manufacturer: RD Labs
Price: £51.24
Blurb: Real time clock/calendar. Battery backed. Requires RD Adaptor.
Source: Sinclair User Jan 83

Name: RD Digital I/O more
Manufacturer: RD Labs
Price: £33.93
Blurb: Digital I/O interface. Requires RD Adaptor.
Source: Sinclair User Jan 83

Name: RD Digital Tracer more
Manufacturer: RD Labs
Price: £55.00
Blurb: Tracer arm allows you to trace images direct to screen.
" Convert your Spectrum into your very own digital paintbox. without complicated programming you can paint anything quickly onto your TV screen. You can draw lines of varying thickness, blocks of colour or shading at a stroke and print text anywhere. Then you can englarge or reduce your picture, turn it upside down or even make a mirror image. "
Source: Sinclair User Aug 83
Note: Came with a tape RD Digital Tracer.
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Name: Red Box Starter Pack more
Manufacturer: Red Boxes
Price: £129.00
Blurb: Consists of three units, Red Leader, Red 1 and Red 2. Red Leader is the microcomputer that uses the Spectrum as a terminal, from which it can be programmed. Once done, it can be left alone to do its task.
Red 1 is a slave unit that plugs into a standard wall power socket, Red 2 is an infra-red sensor. Both units connect to Red Leader, and can be controlled by it. Each unit can be 'read' and operated individually, and more units can be added. A built-in clock adds further uses, as each unit can be programmed to switch on or off at a given time. Ideal for home security.
Source: ZX Computing Dec 86

Name: Redditch I/O Port more
Manufacturer: Redditch Electronics
Price: £18.95
Blurb: 24 line I/O port
Source: Sinclair Projects Oct/Nov 83

Name: REL 4.2 (Analogue relay switch) more
Manufacturer: Harley Systems Ltd
Price: £58.00
Blurb: As REL 4.
Source: Sinclair User Dec 83

Name: REL 4 (Analogue relay switch) more
Manufacturer: Harley Systems Ltd
Price: £55.00
Blurb: Max const. current 5A. Max voltage 250V. 1KW per channel. 4 channels.
Source: Sinclair User Oct 83

Name: Remote, The more
Manufacturer: Blue Alpha Electronics
Price: £34.99
Blurb: Two boxes that allow you to play games at a distance from the TV. Basically its an ultrasound joystick adaptor that uses standard joysticks. You plug one box into the Speccy and the other into your joystick. It has a usable distance of up to 8 metres at a 30 degree single angle.
Source: Your Sinclair Iss 92 August 93

Name: Reset Switch more
Manufacturer: Central Electronics
Price: £3.49
Blurb: Saves wear & tear.
Source: Your Sinclair Jan 87

Name: Reset Switch Box more
Manufacturer: Computerworld
Price: £4.49
Blurb: On/Off switch.
Source: Your Spectrum issue 11

Name: Ricoll Action Replay more
Manufacturer: Ricoll Electronics
Price: (just under £100)
Blurb: Sound sampler that allow record/playback and storing of samples. Glitch free loops and playback at any pitch.
Source: Your Spectrum No.3

Name: Ricoll Buffered Motherboard more
Manufacturer: Ricoll Electronics
Blurb: Allows up to 8 interfaces to be attached to the Spectrum.
Source: Your Computer Jan 84

Name: Ricoll RIFG Sound Generator more
Manufacturer: Ricoll Electronics
Price: £39.95
Blurb: Same unit as the RISG but has a programmable filters and two 8bit I/O ports.
Source: Your Computer Jan 84

Name: Ricoll RIKB1 Keyboard more
Manufacturer: Ricoll Electronics
Price: £37.95
Blurb: Full travel 41-key keyboard plus full sized spacebar. Shift keys on both sides. Metal case.
Source: Your Computer Jan 84

Name: Ricoll RISG Sound Generator more
Manufacturer: Ricoll Electronics
Price: £29.95
Blurb: 3 channel sound synthesiser. Built-in amplifier and speaker. Built-in sweep filter, low pass, band pass and high pass filter. 3 Programmable oscillators (0.01Hz to 62KHz). Envelope shaper.
Uses the AY3-8910 chip.
Source: Sinclair User Jan 85

Name: Robotek Interface more
Manufacturer: Datel Electronics
Price: £29.99
Blurb: Robotics and model controller.
Source: Crash 11 (dec 84)

Name: Rombo Vidi-ZX more
Manufacturer: Rombo Productions
Price: £29.95
Blurb: Video digitiser for all Spectrums. Grabs at 10 fps.
Source: Your Sinclair Aug 88
Note: Came with the Rombo Vidi-ZX tape.

Name: RomJoy more
Manufacturer: Rom Digital Ltd
Price: 12.900 Greek Drachmas
Blurb: A programmable joystick i/f which plugged into the expansion port and with wires (later revision with switches)emulated various keypresses.
Source: Phoebus R. Dokos

Name: RomSound more
Manufacturer: Rom Digital Ltd
Price: 9.900 Greek Drachmas
Blurb: Internal circuit that could output sound from the RF port.
Source: Phoebus R. Dokos

Name: ROM SP more
Manufacturer: Camel Products
Price: £29.95
Blurb: EPROM reader. Up to 16k.
Source: Sinclair User May 84

Name: Rotronics Portable Case more
Manufacturer: SMT
Price: £34.49
Blurb: The best accessory for your micro. Here is an ideal portable workstation. Contains places for your Spectrum, tape recorder, power supply, printer and tapes.
Source: Sinclair User Oct 83

Name: Rotronics Wafadrive more
Manufacturer: SMT
Price: £99.95
Blurb: Mass data storage unit. Dual 128k drives. Centronics & RS232 ports.
Source: ZX Computing Aug/Sep 85
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Name: RS232 Lead more
Manufacturer: Sinclair Research Ltd
Price: £14.95
Blurb: This special lead connects to the industry standard serial interface housed in ZX Interface I, and with other hardware employing RS232. The lead is not supplied with Interface I, but is available as an optional extra.
Source: ZX Spectrum Software and Peripherals Catalogue, Jan 1984

Name: RZ1 more
Manufacturer: Stephen Adams
Price: £20.00
Blurb: Allows you to control the tape motor and input/output select.
Source: ZX Computing Aug/Sep 83