Need to replace some old HT smoothing caps which are currently Ceramic plate. Either ceramic disc or film axial types will do I think.
Some of the others that were ceramics but 20nF 5kV working have already been replaced with film axial types (with the word EFCO on them - dunno if that's a manufacturer or type code).
Anyone know where I can find such things these days - CPC, Maplin and RS are not much help. I'd prefer not to parallel up 4.7nF 4kV types- there's not a lot of room to play with and that's a hack I'd prefer to avoid.