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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


3 posters

    240V transformers for Mark4

    oolala007
    oolala007
    oolala007


    Posts : 4
    Join date : 2013-01-08
    Age : 60
    Location : RUSSIAN
    • Post n°1

    240V transformers for Mark4 Empty 240V transformers for Mark4

    Post by oolala007 Thu Jan 24, 2013 11:05 pm

    Hello dear friends!
    Recently bought and Mark4 Pas3. I live in Russia. Tell me whether there are and where to buy transformers to 240V. As long as I use a step-down transformer, but with it there is a problem with the playback of the bass.
    Sincerely, Alex
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    peterh
    peterh
    peterh


    Posts : 1869
    Join date : 2012-12-26
    Location : gothenburg, sweden
    • Post n°2

    240V transformers for Mark4 Empty Re: 240V transformers for Mark4

    Post by peterh Fri Jan 25, 2013 12:22 am

    oolala007 wrote:Hello dear friends!
    Recently bought and Mark4 Pas3. I live in Russia. Tell me whether there are and where to buy transformers to 240V. As long as I use a step-down transformer, but with it there is a problem with the playback of the bass.
    Sincerely, Alex
    Are you talking about one dynaco pas3 AND one or more dynaco mark IV ( 4 )

    I might help with a pas3 transformer ...
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    oolala007
    oolala007
    oolala007


    Posts : 4
    Join date : 2013-01-08
    Age : 60
    Location : RUSSIAN
    • Post n°3

    240V transformers for Mark4 Empty Re: 240V transformers for Mark4

    Post by oolala007 Fri Jan 25, 2013 2:14 am

    peterh, thanks for the offer to help, I'm interested to transformers DYNACO Mark IV.
    Regards Alex.
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    Bob Latino
    Bob Latino
    Bob Latino
    Admin


    Posts : 3277
    Join date : 2008-11-27
    Location : Massachusetts
    • Post n°4

    240V transformers for Mark4 Empty Re: 240V transformers for Mark4

    Post by Bob Latino Fri Jan 25, 2013 2:39 am

    Hi Alex,

    As far as I know - no one makes a 240 volt replacement transformer for the Dynaco Mark IV. I checked both the Dynakitparts and Triode Electronics web sites and neither site lists a 240 volt version of the PA-135 power transformer of the Dynaco Mark IV.

    Are you sure that the power transformer is at fault? If you get weak or distorted bass from your Mark IV, it could be a ptoblem with the high voltage power supply. Maybe the quad cap is weak ? If it is an original Dynaco quad cap, it should probably be replaced.

    Bob
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    oolala007
    oolala007
    oolala007


    Posts : 4
    Join date : 2013-01-08
    Age : 60
    Location : RUSSIAN
    • Post n°5

    240V transformers for Mark4 Empty Re: 240V transformers for Mark4

    Post by oolala007 Fri Jan 25, 2013 3:42 am

    Hi Bob.I do not think that the problem with the quad cap ... 2 amp play the same way ... the bass is not controlled, not articulated it very much.
    How to determine the original Dynaco quad cap?
    Regards Alex
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    Bob Latino
    Bob Latino
    Bob Latino
    Admin


    Posts : 3277
    Join date : 2008-11-27
    Location : Massachusetts
    • Post n°6

    240V transformers for Mark4 Empty Re: 240V transformers for Mark4

    Post by Bob Latino Fri Jan 25, 2013 4:00 am

    Alex,

    If you have a stock Mark IV with a stock driver circuit and the original 30, 20, 20, 20 uF quad cap, then uncontrolled and non-articulated bass is the nature of the amp. That is what stock Dynaco amps sound like ...

    My advice is replace the stock driver circuit with a modern upgraded driver circuit.

    Bob
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    oolala007
    oolala007
    oolala007


    Posts : 4
    Join date : 2013-01-08
    Age : 60
    Location : RUSSIAN
    • Post n°7

    240V transformers for Mark4 Empty Re: 240V transformers for Mark4

    Post by oolala007 Fri Jan 25, 2013 4:29 am

    thanks Bob
    Necessarily follow your advice.
    Regards Alex.
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    • Post n°8

    240V transformers for Mark4 Empty Re: 240V transformers for Mark4

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