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    I new here, a few pictures of my Dynaco MKIII's

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    hificanada

    Posts : 6
    Join date : 2010-11-07

    I new here, a few pictures of my Dynaco MKIII's

    Post by hificanada on Wed Nov 10, 2010 7:58 pm

    I was searching for the ST-120 amps and I stumbled on this forum, so am new here.I have built three dynaco MKIII's and bought one E-Bay MKIII and upgraded the E-bay unit to the same as all the others. I installed the tube bias kit BBCU-1 and a Alps stepped volume control on all my MKIII's in line with a .22uf audio grade cap to line input terminal on the stock board. The quad cap 80/40/30/20 comes with all the new amps and installed that in the E-bay unit with a new retifier. I am using the KT88 Golden Lion Series tubes and have set them at 68 milliamps, hope that is not to high?
    I have also install screen stoppers for the output tubes on all the amps and also installed diodes on the rectifier tube on all the MKIII's.
    The two MKIII's , drive the Altec 802-8D drivers mounted to the 511B Altec horns and the only way that the Altec Horns, quality of sound was vastly improved, I had to take exchange the JJ output tubes with the Golden Lion Series tubes. When I did that, the best way I can say it was that the bandwidth also improved, the Altecs are a pleasure to listen to, and can really add to a large system . The other two MKIII's using the Golden Lion Tubes are bi-wire and drive the JBL,L7's high frequency part of the speaker that includes the 8in woofer and I noticed a considerable improvement in the upper bass and midrange.The 12 in woofer is driven by a SS amp.
    The air filtered box is in the basement and all four Dynaco MKIII's are in the air tight box with furnace filters on one end and a fan on the other side, this forces clean air over all four amps, that run much cooler, then what they normally would.
















    willieher

    Posts : 8
    Join date : 2009-04-19
    Age : 63
    Location : Ohio

    nice amps

    Post by willieher on Tue Nov 16, 2010 12:41 pm

    Hi I think that you did a beautifull job on your rebuild,
    it seems a shame that you have them hidden in a air tight box
    so that no one can admire the hard work you put into them.
    WILLIE..


    hificanada

    Posts : 6
    Join date : 2010-11-07

    Re: I new here, a few pictures of my Dynaco MKIII's

    Post by hificanada on Tue Nov 16, 2010 6:35 pm

    Thanks Willie, I agree, just that warm and special look of tube amps that can make a great display, but I am just a bit tight on room and the layout of the house, makes it hard to put the amps upstairs. Very Happy

    dynacophil

    Posts : 32
    Join date : 2010-10-26
    Age : 59
    Location : Berlin/Germany

    Re: I new here, a few pictures of my Dynaco MKIII's

    Post by dynacophil on Tue Mar 01, 2011 5:56 am

    Hi! may I ask, why did you mount the spkr terminals from the outside? i mount always from inside.
    Helge

    hificanada

    Posts : 6
    Join date : 2010-11-07

    Re: I new here, a few pictures of my Dynaco MKIII's

    Post by hificanada on Tue Mar 01, 2011 6:06 pm

    Hi Dynacophil

    Do you mean the terminal strip on the amp? I put that on the outside to prevent speaker wires from shorting up against the chassis, at least a less chance of it happening. But mounting it that way, one needs to be careful during assembly that the terminal spades on the inside of the amp is not up against the chassis, before installing the bottom plate. That is a one time inspection only, after that,once the bottom cover is in place, it does not get moved again.

    dynacophil

    Posts : 32
    Join date : 2010-10-26
    Age : 59
    Location : Berlin/Germany

    Re: I new here, a few pictures of my Dynaco MKIII's

    Post by dynacophil on Wed Mar 02, 2011 4:27 am

    ok, if you use lose ends of wire to connect speaker this may happen. I'd use those forked connectors with those original terminals or switch to bananas.

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