ken361
Well-Known Member
selling Ei's again?
Preamp Tubes? - Who, What, When, Where, Why, and How?
- Thread starter joshuaaewallen
- Start date
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selling Ei's again?
Yeah the online stores have them all over, except Doug's. I would try a couple but apparently its really hit and miss with the mocrophonics on these. The Tubestore warns you that there is no warranties when used with guitar amps:
The Ei ECC83 / 12AX7 is modeled after the famous "flat plate" Telefunken pre-amp audio tube. Although no longer in current production, the Ei 12AX7 / ECC83 tube is in stock now. This batch was originally intended for OEM so the bottles are not labeled with the "Ei" brand. The Ei 12AX7 tube is best suited for professional and home audio applications. The exception is guitar amps; although the tone is great, we will not guarantee microphonic performance in those types of amps and would strongly suggest that you try another 12AX7 type. There is no warranty when used in guitar amps.
Ei went out of business a few years ago. Their ECC83 was Marshall's OEM tube for years. They were a copy of a Telefunken smooth plate and supposedly made them on the old Tele equipment. They aren't a bad sounding tube, but they have a reputation for being microphonic. I thought I had a picture of one, but I can't find it. thetubestore.com has some in stock now.
Joe, you either think faster or type faster than me. 
MartyStrat54
Well-Known Member
Yeah that will work, but it's going to sound better with the RFT in V1. Once you get it back in there, you should notice more of a difference in how V1 and V2 work together.
ken361
Well-Known Member
mullard reissue a week tube? doug rated the gain 115/115 sounded not strong at all!!!!!!!!!! low volume tooo. seems fine in the v4
I've heard it described as a lower gain 12AX7 and that's how it sounds in mine especially in V1.
MartyStrat54
Well-Known Member
I just get a kick out of how perfectly matched these CP tubes are. Man, if only RCA could have pulled that off. 115-115. Simply perfect.
This Mullard RI is actually a medium gain V1 type of tube, although I have had certain people tell me that it has noise. I think certain amps may aggravate this. If you like it in V4, then keep it there. That's a good place for it.
Look at it this way. You have a perfectly balanced tube in your PI slot...even though you don't need a perfectly balanced tube in your PI slot.
ken361
Well-Known Member
he owed me a tube cause one went bad and I told him I wanted to try that one, thats a first that I got one balanced like that. Thats not the pi slot v5 is.
ken361
Well-Known Member
wonder if a company made a smaller tube like the old ones it would sound any diff?
MartyStrat54
Well-Known Member
I'm sorry, I keep forgetting you have a 205. I'm so used to 900's and DSL/TSL's. Sorry about that. Well, at least he isn't sending you "matched" tubes all of the time. I'd be getting suspicious then.
MartyStrat54
Well-Known Member
If you had been here a while back you would have seen that. The company was Tech Tube and they were making 12AX7's. Things didn't pan out and they filed for bankruptcy. Now the tubes are like rare to find. Some of the first batch were really horrible sounding.
Oh I want to add that the tubes that did work were often compared to Telefunkens in sound quality.
Marty,
I'm looking at a 12AX7. It was tested on a Hickok 6000A, with minimum good 1250. I think that this is on a scale of 1/3000. Anyway, the tube tests at 1850/1800. Isn't minimum good 70%? Can you explain this so I don't need a slide rule to figure it out?
I'm looking at a 12AX7. It was tested on a Hickok 6000A, with minimum good 1250. I think that this is on a scale of 1/3000. Anyway, the tube tests at 1850/1800. Isn't minimum good 70%? Can you explain this so I don't need a slide rule to figure it out?
MartyStrat54
Well-Known Member
Those tubes would be at 85 to 92 percent out of 100. I know that on a Hickok, if they test at say 2100, the are in the upper 90's.
On my tester where 22-22 is nominal new, the 1850/1800 would probably be a 26-26 tube. Maybe a little stouter.
These are well over 70 percent tubes. On a Hickok, it may go to 3000 mhos, but not all tubes, even new ones will read that high.
On my tester, 65 percent is were good starts, except for how I have to test 12AX7's. I have come to the conclusion that 22-22 represents an 80-80 tube.
If you need to know for sure, I can always test it for you.
MartyStrat54
Well-Known Member
Wow! Ratt's avatar is sort of intimidating. So, all three of us have new avatars.
Hells...we da three amigos!
Hells...we da three amigos!
MartyStrat54
Well-Known Member
Yeah, I like that sound. The sound of money being sucked out of your bank account. Next I'll send you some Amperex's.
LOL! I drew that during one of my more stoned moments. I actually made it for desktop wallpaper. I know I could have downloaded the Steal Your Face design from anywhere, but sometimes it's more fun to do it yourself.
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