Can anyone provide additional information?  Contact: jerry.proc@sympatico.ca

SPECIFICATIONS:

Type: Vacuum tube transmitter. Maybe a hybrid of solid state.
Frequency range: 410 kHz  to 26 MHz

Modes: ?
RF Power:

Output was 1500 watts between 4 MHz and 26 MHz
Output was 400 watts between 1.6 MHz and 4 MHz
Output was 700 watts between 410 KHz and 525 KHz

Frequency control: ?
Mains Power input - ?
Weight - ?
Dimensions - ?

Comments:
* Uses four 4CX350F ceramic tubes in the final.
* Built in  R/T alarm signal generator for 2182 Khz
* It could also be used for RTTY if using the Spector 2 RTTY  terminal
* 12 out of the 25 transmitters that were manufactured were actually sold. No one can account for the others.
* Many circuits in the Challenger were very similar to the  Conqueror. It looks like the Challenger is  more or less, a Conqueror Mk II 2.
 
 

Challenger photo by Peter Hewitson

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Contributors and Credits:

1) http://www.peterhewitson.com/atalanta/Photo0438.jpg
2) Ross Bradshaw G4DTD  <ross.bradshaw(at)mypostoffice.co.uk>
3) Marconi Mariner magazine for March-April 1983.
4) Ross Bradshaw [ross.bradshaw@mypostoffice.co.uk]

Mar 22/20