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Saw them at NAMM in the Jet City Amps booth. They are a direct replacement for 12ax7s. No microphonics and guaranteed for life. 3 different gain levels available. Michael Soldano says they are great. Sounded fine in his amps there but the NAMM floor is no place for really listening...

Hello All: I know someone selling a Mark IIa combo built for him by Randall Smith in 1980. He played it for about 6 hours and put it in climate controlled storage. The thing is basically new. It has a 1x12 extension cab. The combo and extension are made from some kind of rare walnut wood...

Quick question about microphonic tubes: If you push and otherwise quiet tube to the point of squealing, does it damage the tube or make it more prone to be microphonic - or can you just back off and it returns to "normal".? Thanks, Ron

Hi All: I have a matched quad of JJ 6l6GCs. I put them in my Mark IV completely forgetting about the fact that they are supposed to be rated in a certain range to work properly with the amp. I gigged with it for about a month with no problems. When I remembered about the need for a correct...

Hi All: I am interested in buying a RFT 12ax7 or two and while there are many available on E-Bay, most if not all sellers are in Easter Europe/Russia. The seller ratings appear to be good, but I am still a little nervous about it. Have any of you had any expereience with buying tubes from any...

Hey All: I have a few Hammond labeled long plate 12ax7's that say "Made in USA" on them. I have seen Amperex Hammonds, but no American made. Anyone know who made the Hammonds in the US? Thanks, Ron

I see TONS of Baldwin labeled Sylvania tubes on E-bay. What is the deal with these? Are all Balwin tubes re-labled Sylvanias? Are they generally good tubes - I would assume most of them are pulled from old Baldwin organs? I have some old Sylvanias that I really like - would these be another...

Quick quesiton about what tubes I can use in my Mark IV. I know I can put EL34s on the outside sockets and I can run all 6V6's instead of 6L6's. But.... Can I run 2 6V6's and 2 6L6's? Thanks, Ron

Quick quesiton about what tubes I can use in my Mark IV. I know I can put EL34s on the outside sockets and I can run all 6V6's instead of 6L6's. But.... Can I run 2 6V6's and 2 6L6's? Thanks, Ron

Any suggestions you fellow tone freaks have would be appreciated: I have a Mark IV combo with a C-90 in it and I just bought an EVM 12L and an empty Thiele cab. Would you keep the C-90 in the combo and put the EV in the thiele or the other way around? Thanks, Ron

I have a black 1x12 widebody cab with a Black Shadow/Celestion 90 watt speaker. I have used it for some gigs and it has some dings, but in overall good condition. Need a 1x12 theile. My cab plus some cash?

OK, I need some tube wisdom, and I know there is a lot of it here. I just received a pair of Raytheon ECC83's from an auction. They are marked "Made in Japan". Can anyone tell me about them? I am curious because I thought Raytheons were made in the US. Did I get ripped off? I also got a...

I have never heard of this, hopefully some of you have and can help me. :? When I play an E note - any E on the neck - I can hold the note for about 3 seconds and then it drops out. All other notes sustain with no problems and I have tried this on 3 guitars with every E on the neck. The...

F.A. d'Andrea? :? I ordered a pair because they were so inexpensive that it is probably worth the gamble. If you have heard of them: did they make their own tubes or re-label someone else's? Thanks

I asked this question on another thread, but I wanted to get it out to more views: How are the NOS GE 12ax7's? I have noticed that there are more of those available than just about any other NOS tube and they are reasonbly priced. Is that because no one wants them? I am looking for a good...

Actually I am pretty sure it is a tube problem, but I am not sure if it is a power amp or preamp tube. I have a Mark IV. The problem is when I let a chord ring, the volume level becomes inconsistant and on a clean tone it starts to break up in a weird way. Also, with higher gain, all the gain...