Alan Ratcliffe wrote:
Why matched? New production it should be easy enough to get a set. If you must have NOS, then the JAN Philips were all fairly tight tolerance - that's one of the things that made them JAN (Military spec).
I have a Valve Audio stereo amplifier that uses 4 of these tubes (2 per channel), so they need to be pretty well matched. Its seriously the best amplifier I've ever come across, and built right here in SA! Been enjoying its beautiful tones for the past 2 years with no isssue, and I don't think the tubes are even close to failing yet even with daily use, but I'd like to have a set of tubes ready for the day it does decide the tubes are done! According to the life expectancy of the tubes, I should have had to replace them about 6 months ago. ?
Regards
G!