Can a Matchless Clubman handle KT66s?

Discussion in 'Amps and Cabs' started by v-verb, Aug 15, 2005.


  1. v-verb

    v-verb Member

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    Just wonderin' what to put into my latest folly...
     
  2. Laroosco!

    Laroosco! Member

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    I would leave the Clubman alone. If you want a KT66 amp buy a Route 66
     
  3. v-verb

    v-verb Member

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    I'm not sure how to answer this reply, except that you have stated the obvious.:rolleyes:

    Anyone with a constructive reply?

    And yes I have had Rte 66's etc - pretty much most amps out there. I just like tube tweaking. As far as I know this is not a crime.
     
  4. theelectic

    theelectic Guest

    The heater currents are almost the same (EL34 1.5A, KT66 1.3A) so that part is fine. Output Z is similar, but that's not super critical so no big deal there. A socket wired for EL34s can accept KT66s. Where you're going to run into problems I think is (1) the cathode resistor is too low, which will cause the KT66s to run too hot, (2) size: KT66s are approx. 3/4" larger in diameter than an EL34, which means you need at least 2-1/4" (and preferably 3") between sockets (center to center).
     
  5. heybulldog

    heybulldog Member

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    v-verb-i rember phil jamison (spelling?) debunking some hc posting that said you could swap the el 34s for 6l6s- he said this would kill the OT. just in case thats where you were going next!
    but...
    what about swaping the ef86 for the original pre amp tube?
    i love my clubman (94) but allways wanted to hear the original version. does anyone know if this could be done?
     
  6. Sam Evans

    Sam Evans Compliance Officer Gold Supporting Member

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    I had a Clubman many moons ago. I had an open input jack, and I called Matchless for help. I spoke to Rick, and he walked me through the quick fix. As an aside, he said, "Ever put 6L6s in your Clubman?" I hadn't but he assured me it was cool. I never tried it, because I like the EL34s so much. In hindsight I'm glad I didn't get transgenic with my Clubman's output tubes. I'd hate to have fried an OT.

    Sam
     
  7. Roccaforte Amps

    Roccaforte Amps Member

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    Not without modifications
    The amp can handle it, could even handle KT88's.
    But, you'll need to change the cathode resistor
    for either tube.
     
  8. heybulldog

    heybulldog Member

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    MR Roccaforte, any info or thoughts on changing the the ef86 to the original pre amp tube- i forget wich one that was. i know you have worked on clubmans from your past post.
     
  9. Roccaforte Amps

    Roccaforte Amps Member

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    The last I owned had an all triode preamp,
    the was an extra single triode stage of gain
    used to bump the front end.
    Personally, I'm not a big EF86 fan, but
    the Clubmans sound good with either preamp.
    I would leave it alone. Doug
     
  10. heybulldog

    heybulldog Member

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  11. myles111

    myles111 Member

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    In a cathode biased circuit these two tubes bias very differently and the screens of a EL34 is going to look to push about 8 watts and the 66 will try this and fail in short order.

    Do not do this.
     
  12. guitarded_1

    guitarded_1 Supporting Member

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    Forgive me for my ignorance, but is it possible to put a solid state rectifier in a Clubman? If so, has anyone tried this?
     

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