preamp tubes

  1. NoiseNinja

    The exact function of the 2 preamp tubes in my EHX Black Finger based on this service diagram?

    I have wondered what function exactly the 2 tubes of my EHX Black Finger, tube driven optical compressor has, and how the optical compression circuit is implemented in the circuit? I've managed to find this service diagram on the internet, so if anyone who can read such could translate it to me...
    • NoiseNinja
    • Thread
    • black finger diagram ehx black finger function preamp tubes scematic service diagram tube tubes work
    • Replies: 3
    • Forum: Effects [BG]
  2. NoiseNinja

    Will having preamp tubes turned on/off for several short periods of time a day shorten their life?

    I utilize an EHX Black Finger that features 2 preamp tubes, run at 300V plate voltage, as well as an ART Tube MP Project series tube preamp that feature 1 preamp tube, as far as I have gathered run at 70V plate voltage, as part of my "ampless" setup, which I also use for home practice through...
    • NoiseNinja
    • Thread
    • frequent frequently life lifespan on/off preamp tube preamp tubes shorten tube tubes
    • Replies: 1
    • Forum: Effects [BG]
  3. PennyroyalWe

    Amp Modding Questions

    Hello all, Some of you may be familiar with the Monoprice Stage Right 1x12 15w tube combo. I’ve had one for a few years now, and it’s a great little guitar amp. I picked up another one locally for $100, and I’m going to mod it to be more bass geared. I know it will never be a great...
    • PennyroyalWe
    • Thread
    • capacitors celestion guitar amp guitar bass amp monoprice output transformer preamp tubes speaker tube amp upgrade
    • Replies: 37
    • Forum: Amps and Cabs [BG]
  4. Mullards, Amperex, Telefunken, Mazda, JAN Phillips (lot of 6 preamp tubes)
    Sold

    For sale Mullards, Amperex, Telefunken, Mazda, JAN Phillips (lot of 6 preamp tubes)

    Over Christmas break, I bought six (6) 12AT7 and 12AU7 tubes from a fellow TB’er. Here is the link to that listing: SOLD - Vintage Tubes. 12AT7, 12AU7, 12AT7 WA, JAN Phillips, Telefunken, Mullard, Amperex, Mazda The previous seller does a much better job of describing them than I can. I sold...
    $100.00
  5. Bruiser Stone

    SOLD Mullards, Amperex, Telefunken, Mazda, JAN Phillips (lot of 6 preamp tubes)

    Over Christmas break, I bought six (6) 12AT7 and 12AU7 tubes from a fellow TB’er. Here is the link to that listing: SOLD - Vintage Tubes. 12AT7, 12AU7, 12AT7 WA, JAN Phillips, Telefunken, Mullard, Amperex, Mazda The previous seller does a much better job of describing them than I can. I sold...
  6. NOS Rare Vintage Tubes — Mullard, Bugle Boy, Siemens Silver Plate, Telefunken, RCA Black Plate
    Sold

    For sale NOS Rare Vintage Tubes — Mullard, Bugle Boy, Siemens Silver Plate, Telefunken, RCA Black Plate

    Here we have some fine and rare vintage tubes. All purchased as NOS and sound fantastic. Just not using so I’d like another audiophile to enjoy these. Tubes of this caliber need to be used! Nothing wrong with any of them. If you are a tube roller you know of the status each of these. 1...
    $35.00
  7. scubaduba

    SOLD NOS Rare Vintage Tubes — Mullard, Bugle Boy, Siemens Silver Plate, Telefunken, RCA Black Plate

    Here we have some fine and rare vintage tubes. All purchased as NOS and sound fantastic. Just not using so I’d like another audiophile to enjoy these. Tubes of this caliber need to be used! Nothing wrong with any of them. If you are a tube roller you know of the status each of these. 1...
  8. Verellen Meatsmoke Dual Channel Vacuum Tube Instrument Preamplifier
    Sold

    For sale Verellen Meatsmoke Dual Channel Vacuum Tube Instrument Preamplifier

    Verellen Meatsmoke preamplifier version 2, number 106, made in Seattle, Washington, USA. Killer clean tones, overdrive, crunch, and full-on distortion. Ships free CONUS.
    $595.00
  9. bonin in the boneyard

    SOLD Verellen Meatsmoke Dual Channel Vacuum Tube Instrument Preamplifier

    Verellen Meatsmoke preamplifier version 2, number 106, made in Seattle, Washington, USA. Killer clean tones, overdrive, crunch, and full-on distortion. Ships free CONUS.
  10. KERN ip777 preamp TUBES!!!!
    Sold

    For sale KERN ip777 preamp TUBES!!!!

    Wall Wart model ... If you are reading this , then there’s no need to explain much . In excellent shape, I used it for a recording and then never used it again only in a couple of live gigs with a tube power amp. Just KILLER! PayPal ok! Insured Shipping is included within the USA . Act now ...
    $890.00
  11. L

    SOLD KERN ip777 preamp TUBES!!!!

    Wall Wart model ... If you are reading this , then there’s no need to explain much . In excellent shape, I used it for a recording and then never used it again only in a couple of live gigs with a tube power amp. Just KILLER! PayPal ok! Insured Shipping is included within the USA . Act now ...
  12. Preamp tubes
    Sold

    For sale Preamp tubes

    5 12AX7 preamp tubes... Mesa, TRace Elliot, JJ electronic, Groove tubes, Svetlana Shipping included to CONUS
    $35.00
  13. brstma

    SOLD Preamp tubes

    5 12AX7 preamp tubes... Mesa, TRace Elliot, JJ electronic, Groove tubes, Svetlana Shipping included to CONUS
  14. NOS preamp tubes
    Closed

    For sale NOS preamp tubes

    I’ve got some leftover NOS tubes purchased from The Tube Store. Tried them during some tube rolling but ultimately went class D. Two Jan GE 12AX7WA - $45 each/obo (Compare at $90 at Tube Store or Tube Depot) Two Jan GE 5751 - $35 each/obo (Compare at $70 per above) Three of the four are in...
    $45.00
  15. jeff62

    No longer available NOS preamp tubes

    I’ve got some leftover NOS tubes purchased from The Tube Store. Tried them during some tube rolling but ultimately went class D. Two Jan GE 12AX7WA - $45 each/obo (Compare at $90 at Tube Store or Tube Depot) Two Jan GE 5751 - $35 each/obo (Compare at $70 per above) Three of the four are in...
  16. B

    Tube OD Pedal (no SVT tone)

    I'm looking for a pedal that gives me a front end overdriven tubeamp tone for my transistor amp. Not so much that classic SVT growl, maybe a little more distorted going into direction of the Overdrive channel of a Super Bassman 500T or simular. (also not looking for something modern sounding...
  17. Therealgaryv

    Recommendation on preamps!!! Sansamp vs Flyrig vs Twonotes

    I was wondering what you guys think about the Sans-amp Bass Driver vs the Sans-amp Fly Rig vs the Two Notes Lebass Tube Preamp. I have the sansamp bass driver, dynacomp, tc electronics chorus, and a few other pedals in my armada. I was wondering if it’s worth getting the labass and using all my...
    • Therealgaryv
    • Thread
    • bass bass advice fly rig preamp preamp di preamp pedal preamp tubes sansamp two notes
    • Replies: 2
    • Forum: Effects [BG]
  18. EH 12AX7 preamp tubes
    Sold

    For sale EH 12AX7 preamp tubes

    EH Russian 12AX7, used very little. All sold quickly at $6 ea.
    $6.00
  19. TomB

    SOLD EH 12AX7 preamp tubes

    EH Russian 12AX7, used very little. All sold quickly at $6 ea.
  20. No Treble

    Preamp tubes

    I have an Ampeg V-4BH. As predicted, I am now going to exercise my right to go and change some perfectly fine, working, good parts, for no real reason. I found a red-lettered "CHINA" preamp tube in this amp. Probably offers some great access to breakup, and all, but meh. I wannit out of there...
  21. corvettedcg

    Alembic F-2B Preamp Tubes

    After trying a number of NOS 12AX7 tubes (Mullard, Amperex, Telefunken, Sylvania and RCA) that I’ve amassed from tube collecting for my guitar amps, I’ve settled on a NOS RCA 12AX7 in Channel 1 of my Alembic F-2B, and a NOS Mullard ECC83 (i63 version) in Channel 2. Although the RCA is probably...
  22. (3) 12AX7 preamp tubes

    For sale (3) 12AX7 preamp tubes

    Hey all, I don't own an amp that uses tubes anymore so I have absolutely no use for these. All are in good working condition, verified in my neighbor's Hartke HA3500 just yesterday, Oct 23rd. First up is the Groove Tubes GT12AX7R, which according to thetubestore.com, is a recently manufactured...
    $40.00
  23. levis76

    For Sale (3) 12AX7 preamp tubes

    Hey all, I don't own an amp that uses tubes anymore so I have absolutely no use for these. All are in good working condition, verified in my neighbor's Hartke HA3500 just yesterday, Oct 23rd. First up is the Groove Tubes GT12AX7R, which according to thetubestore.com, is a recently manufactured...
  24. TrevorOfDoom

    Unwanted compression

    I'm in the middle of a gig and it sounds like i'm hitting a compressor hard. My soft plucks are nigh inaudible, and my hard plucks just bottom out. I don't know if it's the speaker or the amp. My Orange Terror Bass i've had for 6 years, and i've never replaced the preamp tubes. Could that do it...
  25. 12AX7A preamp tubes
    Sold

    For sale 12AX7A preamp tubes

    I have three - 12ax7 tubes left over from my Genz Benz Streamliner days. All just tried for a bit then put away. Been sitting in a box for a few years, thought I'd see if anyone can use them. All three shipped via USPS for $25 obo.
    $25.00
  26. bherman

    SOLD 12AX7A preamp tubes

    I have three - 12ax7 tubes left over from my Genz Benz Streamliner days. All just tried for a bit then put away. Been sitting in a box for a few years, thought I'd see if anyone can use them. All three shipped via USPS for $25 obo.
  27. 1974 Ampeg SVT with two sets of vintage preamp tubes and fresh sextet of TungSol 6550RI
    Sold

    For sale 1974 Ampeg SVT with two sets of vintage preamp tubes and fresh sextet of TungSol 6550RI

    Late 73/early 74 SVT. It's a monster! Fresh TungSol 6550's (10 hours or so), and includes two sets of preamp tubes. The original (mostly Magnavox) tubes worked great, but I came upon a set of NOS backups that I bought and stuck in just for the heck of it. I believe there are RCA, Amperex...
    $1,725.00
  28. denton57

    SOLD 1974 Ampeg SVT with two sets of vintage preamp tubes and fresh sextet of TungSol 6550RI

    Late 73/early 74 SVT. It's a monster! Fresh TungSol 6550's (10 hours or so), and includes two sets of preamp tubes. The original (mostly Magnavox) tubes worked great, but I came upon a set of NOS backups that I bought and stuck in just for the heck of it. I believe there are RCA, Amperex...
  29. Orange AD200B w/ Cover - Excellent Condition! RCA / Telefunken Preamp tubes
    Sold

    For sale Orange AD200B w/ Cover - Excellent Condition! RCA / Telefunken Preamp tubes

    Hi Had to try one of these and it's incredible, but I just need something a little smaller... Or a meatsmoke! That'd be the only trade I'd be into. Almost perfect shape, purchased it earlier this year. Comes with an orange soft cover. Right now I have an RCA 12ax7 and Telefunken 12at7 in...
    $1,400.00
  30. derekeugene

    SOLD Orange AD200B w/ Cover - Excellent Condition! RCA / Telefunken Preamp tubes

    Hi Had to try one of these and it's incredible, but I just need something a little smaller... Or a meatsmoke! That'd be the only trade I'd be into. Almost perfect shape, purchased it earlier this year. Comes with an orange soft cover. Right now I have an RCA 12ax7 and Telefunken 12at7 in...
  31. JJ Electronic 12AX7/ECC83S preamp tubes x3
    Sold

    For sale JJ Electronic 12AX7/ECC83S preamp tubes x3

    Unused/unopened - I had originally purchased these to replace the tubes in a GK MB Fusion 500; no need now. $24 shipped CONUS via USPS priority. Paypal only.
    $24.00
  32. steelbed45

    SOLD JJ Electronic 12AX7/ECC83S preamp tubes x3

    Unused/unopened - I had originally purchased these to replace the tubes in a GK MB Fusion 500; no need now. $24 shipped CONUS via USPS priority. Paypal only.
  33. Xavier_LV

    Orange AD200 MKIII preamp tubes

    Hi, I would like to access (and maybe change) the preamp tubes (2 x 12ax7 and 1 x 12at7) of my newly acquired 2011 AD200 MKIII. I gave it a try by unscrewing the back panel. I cannot access to preamp tubes since the power tubes (4 x 6550) block the way. Simple question: can I safely remove the...
  34. Mesa Boogie 12AX7-A preamp tubes (4 total )

    For sale Mesa Boogie 12AX7-A preamp tubes (4 total )

    I have 4 new Mesa Boogie 12AX7-A preamp tubes. I no longer have a tube amp so they never got ised. I had them rechecked last week and they are good to go. Price includes shipping to the lower 48.
    $55.00
  35. newspectorguy

    For Sale Mesa Boogie 12AX7-A preamp tubes (4 total )

    I have 4 new Mesa Boogie 12AX7-A preamp tubes. I no longer have a tube amp so they never got ised. I had them rechecked last week and they are good to go. Price includes shipping to the lower 48.
  36. shababy32

    12AX7 TUBES??

    Howdy folks! I recently bought an ART Tube preamp the other day. I've had some positive reviews with the exception of the cheap Chinese tubes that come with them. Any input on what 12AX7 tube to use? I've gotta Ampeg portaflex 500 head. I want the sound to be warm, yet bright, punchy and clean...
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