Couple things on EH and RFT's

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by alanfc, Oct 3, 2005.

  1. alanfc

    alanfc Member

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    hi,
    I was searching on some opinions on 12ax7 EH's, and came across an old post, talking about "smeared" and "unfocused" midrange.

    This smeared midrange is what I think I'm getting too with the EH in V1 of my Rivera R55, almost kind of scratchy, like the amp is being recorded =direct= (even though I'm playing with a live band). Is that what they mean?

    Its almost like chords don't vibrate with that smooth vibration that I used to be able to get with my RFT or GT 12ax7m.

    Are the GT 12ax7M's doing better now? My NOS RFT ECC83 which was a total dream, has failed on me after only a year. I heard that RFT's are more delicate than other preamp tubes. They don't like to be changed in and out and handled alot. Is that a fact?

    now that I'm here, one other thing that was weird yesterday at rehearsal,
    I moved my tuner to my FX loop and for some reason the repeats on my Digital delay were distorted, not like I've ever heard before. Would the tuner before the Delay, in the Loop, make this happen? It was weird.

    thanks if you can opinionate for me
     
  2. TheAmpNerd

    TheAmpNerd Member

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    Crummy tubes will definitely sound crummy.

    Some folks use the EH "exclusively" for
    PI duty.

    And some tubes sound great in some amps
    and not so good in others.

    Find some used or NOS tubes and stick them in there,
    that should make a huge difference.

    Try until you find one that works for you,
    then go with that.

    That is the beauty of tube amps,
    those little buggers give their lives
    for your tone. If you don't like 'em,
    change 'em until you find one you like.

    Try doing that with a transistor!
     
  3. alanfc

    alanfc Member

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    OK thanks
    I'm going to try alot of new tubes in the next few months thats for sure.
     
  4. Igneous

    Igneous Member

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    Yes, the rft's are sensetive. I have had one sprung a leak outta nowhere.:( careful.
     
  5. TheAmpNerd

    TheAmpNerd Member

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    Kinda like those
    ol' Navy ships.

    Some are overly sensitive too, I had one slap me over
    a comment I made.



    "Oh the pain, oh the glorious pain."

    -- Dr. Zachary Smith
     
  6. alanfc

    alanfc Member

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    So what's the closest I can get to an RFT??
    I mean $30- 60 a year isn't so bad but

    is there anything else out there like it?
    It just was the perfect match for my Rivera and my Strat w/Duncan JB bridge pickup:(
     
  7. Tone_Terrific

    Tone_Terrific Member

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    You're overdriving the tuner in the loop. Not a good thing.
     
  8. alanfc

    alanfc Member

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    OK thanks
    do you think I could have damaged the tuner?
    It was getting 3+ hours like this
     
  9. drbob1

    drbob1 Silver Supporting Member

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    1. RFTs are pretty cheap for high quality NOS tubes, not sure you're going to find anything else better for the price. Maybe give Lord Valve a call and see what he recommends?

    2. No harm to the tuner, but it needs to be right after your guitar, in a loop if it's not true bypass.
     
  10. alanfc

    alanfc Member

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    OK thanks
    so there's no tech reason I could hurt the tuner in the loop....?
    My send and return levels are at what Rivera judges to be unity at 6.5 on the knobs
    I'm really curious now because I'm thinking of going zero FX upfront but I love the tuner.
    Thanks
     

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