Recent content by kind

  1. kind

    Scott 299C, no bias pots

    I found a strange thing while testing the amp. One speaker has constant continuous hum. But when I touch any pin on output tube with probe the hum abruptly disapeares. After about 30 seconds it gradually comes back. Touch again and it's gone etc. What on earth is going on out there? I should...
  2. kind

    Scott 299C, no bias pots

    primosounds ok )) But it's more than 100 USD here. So... BTW I don't like how Telefunken 6U8s sound. May be they need time to burn in? At the moment they sound dull and saggy. Today I replaced old bridge with new one. Plus changed resistor (18 -> 30 Om). Now I have -44 VDC where should be -40...
  3. kind

    Scott 299C, no bias pots

    Dandy, greeting.:beerchug: What about Russia vs Enland in the FIFA 2018 final? :) We have a rush in here. He didn't, and I think this is good news. I prefer to do it myself )) Changing caps is in do-it-first list. triode17 Thank you for guideline. I'm going to buy pair of Telefunken at...
  4. kind

    Scott 299C, no bias pots

    Yes, I think so. Today I've got NOS Mullard GZ34. My previous was USA Tung-Sol. I would say Scott sounds darker with Mullard and lacks some dynamics. Waiting for the "rock'n'roll" to come after burn-in time. At the moment I would prefer Tung-Sol.
  5. kind

    Scott 299C, no bias pots

    kvflyer Dandy Many thanks. Surely I'll do everything you adviced. My first step is reading :) and collecting more info in order to understand the very basics. Thanks for pointing to Dave45 thread. I don't think my Scott is 100% original. Somebody has already been there :-) I haven't seen...
  6. kind

    Scott 299C, no bias pots

    Thank you for your answers. century tek The amp has weak power from the begining. The points I measured are: I think it's a step-down transformer can't hold a load. But this is just my guess. What I don't uderstand is whether fixed bias good thing or bad thing :) What if bias goes beyond...
  7. kind

    Scott 299C, no bias pots

    Hi! Few days ago i purchased 1962 Scott 299C amp. I like it a lot, it realy shines after all modern amps I have had. I wasn't very lucky: my amp nees some restoration. First, There is a 50 Hz hum coming out of right speaker. Sometimes it disappears, but it comes back after a while. I swapped...
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