[Boatanchors] Valves (tubes)

[mick]

Hi all,
          My name is Michael Harley and I am the Curator of " The Wireless Shack" at the Caboolture Historical Village, Brisbane Australia.

I am trying to tap into some information that I know will be found on this list to help identify some recently acquired tubes for our collection. Any information (type ,pin connections, power output etc) would be most helpful.
These tubes are quite large (3ft high x 8ins Dia.) and I suspect are very high output RF (K W) transmitting tubes.
    The 4 tubes are marked 
         M.O.- MT 7A, 
         M.O.- MT 7B,  
         Phillips DA 10/2500 
         Marconi MR 10 (has no pins only wires) 
These tubes are still in there original packing cases.

Thanks for any help that you may be able to supply.
Michael Harley
Curator ,The Wireless Shack, Caboolture Historical Village Brisbane Australia.