mhuxtable

Yeah I know they are total experts, but I do appreciate the extra mile you go and I am a very details oriented person. If a few more steps make a difference it getting an amazing tone, why not do them you know? Yeah I think I'm gonna get my output tubes from Doug and my preamp tubes from Mike even though he seemed a little off putting (he said in 20,000 orders he has never had anyone that specific about preamp tubes). Once I get back from the beach this weekend I am gonna put in my orders and once I get the tubes have my tech guy bias the outputs for me. Myles you are awesome, thank you for all your help and your patience. I will let you know how everything sounds once it is all in.

Don't go the GT route .... the new GT/Fender is something I no longer trust. Go to either www.kcanostubes.com or www.dougstubes.com and get some good winged C real Svetlanas as tell either Mike at KCA or Doug at Doug's Tubes that you want a middle range spec tube and tell either one of the hello from me. Those are actually the 2 people I've been emailing back and forth with. Doug said he cannot/willnot measure all the preamp tube specs you recommended, Mike can/will (although he seems to be annoyed I've asked that much). I will ask Doug about those output tubes.

Dude you respond freaking fast. Yeah I have gotten a couple of responses and they are interesting. Either "We dont measure all those specs" or "yeah we measure them but if youre that specific then its gonna cost you lots extra" (like Im a freak for getting that specific). Id rather pay extra to know Im getting your expertise in my amp. Thats why I trust you, youre not afraid to deal with the details. So I think some NOS are going into the preamp and the GT 6L6s for the output cos I just cant afford NOS in the outputs. If I get a GT 6L6 at a #7 will that mean I get one with the 72mA you recommended?

Hey Myles, about the Twin Reverb again. I emailed all the tube dealers on your site with your specs you mentioned to see if they can measure each of them. In the meantime, I was looking up stuff about my amp and I saw something that said it has a fixed bias? What exactly does that mean and does that change the type of output tube you recommended? If my amp is "fixed bias" can you bias the tube to 32mA per tube like you said?

In V1 and V2 get some great long plate types of 12AX7 such as a 12AX7LPS. Get them from a vendor that can measure current output and make sure they are at least 1.0mA output. Also have them make sure the gain is at least 85 at 250 plate volts with a 2 volt bias. On the phase inverter in V6, you want a 12AT7 that is matched with a transconductance of at least 5000 on each side. On the output tubes you want some strong 6L6's ... again, from a vendor that can test these at RCA, GE, or Sylvania book spec and assure that they are matched within 10% and the current output is at least 72mA per tube. You will then bias these at 32mA. If you use a GT tube, specify a #7 rating in the 6L6GE or 6L6CHP. Hey Myles I think Im to the point where I can do these things you recommended to me a while back. Now, do you know of anyone in NC that you would trust to measure these specs of tubes? And are there any particular brand you like? Im totally new to doing all this and Im not even gonna attempt to do this myself. Basically Im gonna take the amp and print out what you said to a good amp tech and let them go to town. Any idea what a general cost would be for the tubes at those specs and then generally how much do techs charge to install them? Or is it easy enough to where I can order the tubes and put them in myself? Do you know Tim Ristau who owns Superfine Ampworks? Im rambling. Sorry. But you are the man. On preamp tubes it is plug and play. On output tubes a simple rebias should be done at the minimum bench charge. (If you were near me I'd do it for nothing) As far as testing tubes ... to do it right takes equipment that most tube vendors do not have. If they have anything it is usually a simple transconductance tester and this only tests one paramater or two and one of these can be good or bad and the tube can also be great when a tester of this type says it is not good or bad when the tester shows good TC. I have a list of vendors on my website that do great work and stick with those folks. Thanks Myles. So youre saying if I order the proper preamp tubes at the specs you mentioned I can install those myself? And the output tubes I should get biased properly by a tech?

In V1 and V2 get some great long plate types of 12AX7 such as a 12AX7LPS. Get them from a vendor that can measure current output and make sure they are at least 1.0mA output. Also have them make sure the gain is at least 85 at 250 plate volts with a 2 volt bias. On the phase inverter in V6, you want a 12AT7 that is matched with a transconductance of at least 5000 on each side. On the output tubes you want some strong 6L6's ... again, from a vendor that can test these at RCA, GE, or Sylvania book spec and assure that they are matched within 10% and the current output is at least 72mA per tube. You will then bias these at 32mA. If you use a GT tube, specify a #7 rating in the 6L6GE or 6L6CHP. Hey Myles I think Im to the point where I can do these things you recommended to me a while back. Now, do you know of anyone in NC that you would trust to measure these specs of tubes? And are there any particular brand you like? Im totally new to doing all this and Im not even gonna attempt to do this myself. Basically Im gonna take the amp and print out what you said to a good amp tech and let them go to town. Any idea what a general cost would be for the tubes at those specs and then generally how much do techs charge to install them? Or is it easy enough to where I can order the tubes and put them in myself? Do you know Tim Ristau who owns Superfine Ampworks? Im rambling. Sorry. But you are the man.

Hey Myles this is the guy a few posts ago who asked about a clean sound for my Fender Twin Reverb (65 reissue). Well I have a problem now. I havent done any work to the amp at all since you posted about it. Tonite, at band practice, I was playing for 2 or 3 hours when all of sudden, the signal just completely dropped out. No noise from my guitar whatsoever. I had my guitar plugged into input 1 on the reverb/vibrato channel. I plugged into input 2, still no guitar sound. When I turned the volume up to 10, you can hear the speakers getting louder, and if I tapped on the reverb tank, the sound came thru. So then I plugged into the dry channel and both inputs work fine. Any idea what the heck is wrong? HELLLLP please. Thanks Myles.

Hey Myles, I'm semi-new to this forum and your service is greatly appreciated. I'm a bit different than what I'm reading from most people. I play a Fender 65 reissue Twin Reverb with a Sheraton and a Strat. My thing is, I want the loudest possible sound with NO crunch. Just a completely clean, shimmering, warm sound. Are there any mods I should do to the tube setup of the amp? Everything is stock. Thanks again!