|
|
|
|
|
|
|
UK
Spy radio transmitter and receiver
- this page is a stub
Mk.128 was a valve-based short-wave (SW) spy radio set for
morse code signals (CW),
developed in the mid-1950s by the
Diplomatic Wireless Service
(DWS,
later: HMGCC) at Hanslope Park (UK).
The radio set was intended for airborne use, in particular by the
Special Air Service (SAS),
and is suitable for a 15 - 20 mile range in the 2 — 8 MHz frequency
band. It is also known as SR128.
|
The radio was available as a one-piece solution (Mk.128 and Mk.128A),
but also as the multi-part solution (Mk.128B) shown in the image on the
right. It consists of two major units — a transmitter and a receiver —
plus accessories.
The radio set covers the 2 — 8 MHz frequency range in two bands,
and delivers an output power of approx. 1 Watt.
|
|
|
Mk.128 All-in-one unit in wooden case, carried in canvas pack Mk.128A Later version with improved storage space Mk.128B Two-box version with external battery in canvas pack
|
Device Spy radio set Purpose Special forces, diplomatic traffic Model Mk. 128 Developer HMGCC Manufacturer ? Year 1957-58 (est.) Country UK User SAS, DWS Antenna Spool with 100 ft of wire Power 4 x battery 67.5V (No. 1), 1 x battery 1.5V (No. 14) Range 15 — 20 miles Temperature 0 — 50°C Dimensions 460 × 305 × 165 mm Widht 8 kg
|
- Transmitter
- Receive
- Canvas bag
- Morse key
- Crystals
- Headset
- Antenna and ground wires
- Reading lamp
- Ground pin
- Batteries
- User manual
- Spare parts (valves)
|
Circuits CO, PA Frequency 2 — 8 MHz Bands 2 (2 — 4 MHz, 4 — 8 MHz) Modulation CW Output 1 Watt Valves CV1758 (DF92, 1L4), CV807 (DL93, 3A4) Crystals Fundamental frequency only Dimensions 120 × 210 × 108 mm (?HWD} Weight 1250 g
|
Circuits Superheterodyne, BFO Frequency 2 — 8 MHz Bands 2 (2 — 4 MHz, 4 — 8 MHz) Modulation CW, MCW, AM Sensitivity 15 — 40 µV Output 1 mW into 20 kΩ Valves DK96, CV785 (DF91, 1T4), DAF96, 2 × DF96 Dimensions 120 × 210 × 108 mm (?HWD} Weight 1350 g
|
- Station, Radio, 128 - Technical Handbook - Data Summary
Issue 1, 19 February 1964. 3 pages. 1
- Station, Radio, 128 and 128A - Technical Handbook - Technical Description
Issue 1, 31 December 1964. 31 pages. 1
- Station, Radio, 128 and 128A - Technical Handbook - Unit Repairs
Issue 1, 25 March 1965. 1 page. 1
- Station, Radio, 128 and 128A - Technical Handbook - Field and Base Repairs
Issue 1, 25 March 1965. 1 page. 1
- Station, Radio, 128B - Technical Handbook - Data Summary
Issue 1, 20 February 1967. 3 pages. 1
- Station, Radio, 128B - Technical Handbook - Technical Description
Issue 1, 21 June 1967. 25 pages. 1
|
|
|
|
Any links shown in red are currently unavailable.
If you like the information on this website, why not make a donation?
© Crypto Museum. Created: Wednesday 05 August 2015. Last changed: Monday, 08 September 2025 - 10:05 CET.
|
 |
|
|
|
