This has been a very tentative subject for many years but more and more interest has come about from equipment finding its way to auctions we all know which one I am talking about this can be very misleading at times. I don't preface to being an expert in this field I am just very passionate about it. there are professional sources for information The Royal Signals at Blandford camp being one of them there museum is excellent along with  there records office also on line is the Military Vehicle Database if you have the military number you can get a record card of the vehicles service with the military. we do have an account with this database if your not very computer literate we can do this for you the military do have an admin fee. a check can be done first to check if they have the info. another source for information is Bletchley Park  Headquarters for code breaking and cypher since the 1940's there first achievement breaking the code for the German Enigma machine this probably being one of the first examples of Electronic Warfare. late 1970's and 1980's were the time things really hoted up with the cold war a lot of this being handled by the Royal Signals 14th Electronic Warfare division we could even go down the route of the rotor system and cold war bunkers we do have contacts for this but I will stick to the subject in hand. I will post links later for some of these if you have any kit you feel we have missed and happy to send the info in please contact me and I will add it in.