[Amps] Marconi / Racal

[ADRIAN REES]

Hi all;
I have the opportunity to purchase some used Marconi / Racal Amps. All I know so far is that they are:
 
HF (below 30MHz)  
Manufactured between 1965 and 1995.
Are rack mounted, (varying in height between 5 or 6 inches to full 6 Foot Racks)
 
If anyone is reading this knows of a website giving details of this sort of commercial grade amplifier, particularly specifications, I would be interested in hearing about it.
 
Any other comments gratefully received.
 
Adrian Rees