Originally Posted by Pellseinydd
The 1983 Vocabulary of Engineering Stores doesn't have such a thing as a 'Cell Dr No 2' - in any case dry cells were 1.5 volts. It does list an 'Oscillator No 87D' which it says uses a 9 volt 'Battery No 30' which is fitted with press studs. Size of battery is 1 and 13/15th of an inch (45mm) square and 2 and 7/16th of an inch (62mm) high. This size battery is known as a PP7 size and not very common these days but still available. Now I suggest you sit down!!
They cost just over £14.00 each on eBay inc. carriage. I'd tend to go to Maplins and get connectors to allow you to use PP3 batteries - a lot cheaper and I'm sure you'll not be giving it the usage of a hard working Telephone Engineer?
More than that I cannot help.
CNet 0352 2979 - the replica GPO telephone network.
Wow! £14!! I'll definitely take your advice & get an adapter or even resolder one on new myself. I do quite a lot of cable tracing so it'll get good use!
Thanks for the info, regards, Steve.