Elliott... you have a good point about the tube tester. There used to be one at a repair shop in Miami but he closed many years ago and I have not been able to find anyone with one. I use 6DJ8/6922 tubes. About 15 or so years ago I rolled everything I could get my hands on from all over the world. Bugle Boys/Amperex/Valvo/Chinese 6DJ8s/Telefunkens and many more. Discovered that the Siemens and Halske Cca 6922 Grey Plates round and D getters from the later 50’s and early 60’s were the best in my system, except for a stray set of 1958 Valvo Pinched Waist 6922 Cca tubes. Found a source in Germany and stocked up on the Siemens... they were about $40 each back then. Sold off a bunch at $200 each and still have a couple I just found in the back of the closet. I see someone trying to sell a matched pair @ $2000. Probably try the ones I have today. Currently I’m using 1975 6N23P SSW Russian Reflectors I get from a lady in the Ukraine and have watched them double and a half in the last few years. Have a couple of Russian Rockets in the closet too I didn’t like as much as the Reflectors.
Generally I’ll just run them until the bass or highs start to deteriorate and then replace them. I really like the tester idea.. want to keep my 30 year old pre-amp going as long as possible. https://www.martindareff.com/Other/HDR-Treated-Images/i-ZmLg23s/A
Generally I’ll just run them until the bass or highs start to deteriorate and then replace them. I really like the tester idea.. want to keep my 30 year old pre-amp going as long as possible. https://www.martindareff.com/Other/HDR-Treated-Images/i-ZmLg23s/A