This Canadian Wireless Set  C-43  that was Built 18March 1943 was Radio Kaleidoscopes Short Wave (49 Meter Band)  Broadcast Transmitter.  Due to its size and power requirements the C-43 transmitter was installed at a separate unmanned location in a barn close to Rochford, Essex not far from Southend-on-Sea. Many oversea,  signal reports and dedications were received from persons in continental Europe up to 300Miles away.

The Transmitter Power Amplifier and modulator sections were modified to provide over 600 Watts of RF output power on the SW 49 Meter band, the power supplies used  large transformers produced in 1968 by Chris Mcarthy’s ,Grandfather Cecil Steward, a “Transformer Manufacturer” from Hadleigh, Essex.

The 43 set transmitter was site was remotely controlled and activated using what was later known as a phantom pair PTT switch via the same same GPO telephone lines,  the Radio programes were then sent directly the the transmitter using the same two telephone wires from a location 5 miles away at Hadleigh Essex.

John Graves G3TOU  a local radio amateur from Rochford, Essex would often monitor the transmissions and provide quality reports. (SWM-1965-02.pdf)

This 43 Set transmitter was given to Radio Kaleidoscope by Roger Allen in 1969

The Radio Kaleidoscope Short Wave transmissions received the most responses from transmissions broadcast between the hours 14:00 – 21:00 requests came in from locations up to -300 miles away

The front panels on the 43 set transmitter are quite colourful – not seen in this B&W picture

WS No 43 Truck Installation

WS No 43 – Installation Block Diagram

WS No 43 – Power Amplifier 2 x 813 stage

Original WS 43 – Power Supply units built by the Radio Kaleidoscope team – 1969

Canadian 43 Set instruction manual

Radio Kaleidoscope SW 49 meter band WS No43 transmitter – Power Requirements