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  1. L

    Smallbox NFB move question?

    I'm wanting to update my earlier Smallbox to the Synergy caps and NFB move. Caps are ordered but I need help on what to move for the NFB. I have enough skills to do the work but just need to know what wire to move to EXACTLY where on the selector switch. Any help would be appreciated. Thanks!!
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    What's EL-34's is Dave using in the current Small Box 50's?

    Time for some new tubes for my Small Box. I'm curious what Dave is using/suggesting for retubing. Mine is a 2014 and currently has ARS labeled EL-34's..... Thanks!! :rock:
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    Smallbox + Variac question for Dave

    Is it ok to run my Smallbox at 90vac?
  4. L

    Friedman Smallbox Bias: Is 10-11ma too far apart?

    Last night I measured the output tube Bias with my Compu-Bias and found the EL-34's are 10 to 11ma apart. The one tube was noticeably hotter as I removed the tubes from the probes. I realize back in the day no one even considered "matched" tubes. I think it sounds ok, but I've only had the...
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    Smallbox 50 Consistency?

    Has anyone had an opportunity to play several of these and see how consistent they are from one to another....? Thanks!
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