What tubes are you using;CJ Prem.5

avguygeorge,here's bill thaleman tel.# 703-764-7005,he's shop is located in springfield Viginia.i should mention that before purchasing my CJ5's i own audio research vt200,sonic frontier power 3's,CJ 12's and 11a.all the above are fine amp's,but the 5's are magical in triode mode.if your pair is in excellent to mint condition i would serioulsy consider the mod's.any question's give bill a call,he's a true music lover and a gentleman to talk to. good luck.let me known what you decide to do.

Thanks indeed Fonsy. Mine must be in great shape. I can't believe how it walks over my newly re tubed Def.7 Mid to top end just as you describe. Sure sounds like the 500 mod is money well spent.We also agree on the sound of these two tubes. In the unmodified state the Siemens more of the top end /female vocal /piano/magic.Thanks again.

Avguygeorge: Just to let you know that I have known Fonsy66 for a couple of years now. Believe me when I tell you, this guy knows his stuff. He has had more equipment in his house than you could imagine. None of what he tells you is at all an exaggeration. I'm sure you will be pleased with these recommended modifications & find them well worth the money.

Hi Fonsy & Sager,I talked to Bill yesterday. Nice accommodating guy indeed. Gotta get some boxes;and off they will go.He will return them in some new factory boxes. We are going to do the rcas,binding posts,install iecs,the wiring and mu follower.Can't wait.Don't tell him but the price is unbelievable. And yes on the Svetlanas.Thanks for your input and help guys.What a place to belong to!!!!The funny thing is I love this amp already. I'll probably be quite hard to live with after.

Avguygeorge: Your quite welcome, but Fonsy deserves all of the thanks. Wait until you get these things back. Then you will be really thanking him. If love the CJ 5's now, I'm sure your going to be in awe when you hear it with the mods. I don't want to mis lead you. I have not heard Fonsy's amps, but I've known him for a while now & he & I have very simular sonic taste. If he says it's incredible,it is. He tells it like it is. We both feel that just because a component cost a lot, that doesn't nessasarily make it sound great. I can't wait to hear your reaction when you receive these amps back with the mods. Most of all, enjoy....sagger