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Author Topic: 7025 tube  (Read 3015 times)

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BC Rich Guy

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7025 tube
« on: Time Format »

Any experiences/reviews using this tube in the MP 2?
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rnolan

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Re: 7025 tube
« Reply #1 on: Time Format »

Not personally, what brand is it ? 7025 from what I have read is a 12AX7A the 7025 being a European designation like ECC83 (http://en.wikipedia.org/wiki/12AX7) (http://www.dougstubes.com/preamp-tubes/12ax7-ecc83-7025/ruby-7025-ss-hg.html).

IIRC Dente has done some tube rolling with his MP2, and I suspect MJMP may know something about them.

For myself, I had the original Chinese tubes in my first MP2 (I bought it new as soon as they came out, had to sell my MP1 rig to pay for it, not that it's far away, MikeB has it so it visits me once a week LOL). The original tubes lasted for years. I finally changed them to Boogie STRs (briefly, nice feedback but a bit 2D and broke up (in not a nice way) on the bottom E) now I use the Mullard long plates in all 3 MP2s. They really suit my playing. Plenty of posts about them in the Tubes section.
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

Systematic Chaos

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Re: 7025 tube
« Reply #2 on: Time Format »

7025 used to be/is the MilSpec version of a special selected 12AX7 for lowest noise/hum/microphonics. Other than that they are identical to 12AX7/ECC83.
Todays common tubes are already engineered for the above mentioned criteria, so a V1 selected/graded 12AX7/ECC83 is nothing else than a 7025 or vice versa.

The closest current/modern production tube to the original Chinese "National" 12AX7 that the ADA MP preamps were designed around and came shipped with is the TAD RT001 12AX7A-C as this tube combines all the best and desirable bits and pieces of the Chinese 12AX7 revisions A through C
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Mesa Boogie MkIVb short head, ADA MP-1 v2, Fractal AxeFX II, Rocktron Velocity 150; Digitech GSP1101, DigiTech 2120Artist, Carvin Tube 100, Yamaha MFC10//
Ibanez RG550RF, Ibanez 540S-LPF DY, Ibanez RGR620TKS, Ibanez RGR620TPS, Ibanez RG550Ltd BK, Ibanez RG7620MSOL, Ibanez RGR465MCA, Ibanez RGR765RCB, Ibanez RG620QMSP, Ibanez RG1420FBHB, Ibanez RGT42MDX, 90s ESP M-II Dlx //
DiMarzio CrunchLab/ToneZone/Gravity Storm/Liquifire/AirNorton/PAF Pro/HfH/ibzUSA F Series pups

rnolan

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Re: 7025 tube
« Reply #3 on: Time Format »

Hey SC, thanks for the heads up, the TADs seem interesting, your a bit of fan of the TADs ?? IIRC they came up previously in a conversation about how to get the closest to the original MP1/2 tubes.
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

Systematic Chaos

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Re: 7025 tube
« Reply #4 on: Time Format »

TAD has some nice tubes....I personally don´t like the 12AX7A-C, but I also don´t like the original Chinese 12AX7s. But in terms of current production 12AX7s the TAD is the closest to the Chinese "Nationals" that were used in the ADAs.

I do however like the TAD 6L6WGC short bottle as that one doesn't sound as stiff but ways more complex than the normal Chinese/Shuguang 6L6GC (...which TAD also offers...)

My actual favorite current production 12AX7 typo is the Tube-Town E83CC
http://www.tube-town.net/ttstore/Tubes/Tube-Town/TT-E83CC-12AX7-V1::4674.html
My all-time fav however is the Blackburn Mullard ECC83, followed by a good selected RFT ECC83...but those are both NOS and go for top $$$  :(
« Last Edit: Time Format by Systematic Chaos »
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Mesa Boogie MkIVb short head, ADA MP-1 v2, Fractal AxeFX II, Rocktron Velocity 150; Digitech GSP1101, DigiTech 2120Artist, Carvin Tube 100, Yamaha MFC10//
Ibanez RG550RF, Ibanez 540S-LPF DY, Ibanez RGR620TKS, Ibanez RGR620TPS, Ibanez RG550Ltd BK, Ibanez RG7620MSOL, Ibanez RGR465MCA, Ibanez RGR765RCB, Ibanez RG620QMSP, Ibanez RG1420FBHB, Ibanez RGT42MDX, 90s ESP M-II Dlx //
DiMarzio CrunchLab/ToneZone/Gravity Storm/Liquifire/AirNorton/PAF Pro/HfH/ibzUSA F Series pups
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