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    Alternate Layouts for Mark III Chassis

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    TN Allen

    Posts : 124
    Join date : 2013-01-01

    Alternate Layouts for Mark III Chassis

    Post by TN Allen on Wed Apr 10, 2013 7:43 pm

    I have received a Mark III PCB kit from Mr. Mottram, plan to buy transformers and sockets from dynakiparts, and prefer building a chassis for a Mark III amp to buying a chassis with the original Dynaco layout. Are there alternate chassis layouts. I'd appreciate suggestions, comments and criticisms regarding this idea.

    denny9167

    Posts : 152
    Join date : 2011-05-09
    Age : 49
    Location : Texas

    Re: Alternate Layouts for Mark III Chassis

    Post by denny9167 on Wed Apr 10, 2013 7:54 pm

    TN Allen wrote:I have received a Mark III PCB kit from Mr. Mottram, plan to buy transformers and sockets from dynakiparts, and prefer building a chassis for a Mark III amp to buying a chassis with the original Dynaco layout. Are there alternate chassis layouts. I'd appreciate suggestions, comments and criticisms regarding this idea.

    I've been designing a layout very similar to the Mark IV with a custom top plate and wooden chassis.[img][/img][img][/img]

    tubes4hifi
    Admin

    Posts : 1286
    Join date : 2008-11-30

    Re: Alternate Layouts for Mark III Chassis

    Post by tubes4hifi on Wed Apr 10, 2013 8:24 pm

    this uses a different rectifier tube than normal, but is otherwise a VTA MK3 octal.


    Sprags

    Posts : 123
    Join date : 2013-02-27

    Re: Alternate Layouts for Mark III Chassis

    Post by Sprags on Thu Apr 11, 2013 11:54 am

    Looks nice.

    TN Allen

    Posts : 124
    Join date : 2013-01-01

    Re: Alternate Layouts for Mark III Chassis

    Post by TN Allen on Fri Apr 12, 2013 2:25 pm

    Here are two images of what I have in mind. The overall length would be about 11", the width 7". I'd make the chassis out of a combination of 1/4" Aluminum plate(top & bottom), and a wood frame similar to the last images below. I'm curious about the approximate diameter of the KT 88 tubes.

    I haven't quite figured out including images, so here are links to Flickr files:

    http://www.flickr.com/photos/68227271@N04/8642572189/in/photostream
    http://www.flickr.com/photos/68227271@N04/8643670706/in/photostream
    http://www.flickr.com/photos/68227271@N04/8642661151/in/photostream
    http://www.flickr.com/photos/68227271@N04/8643686006/in/photostream

    denny9167

    Posts : 152
    Join date : 2011-05-09
    Age : 49
    Location : Texas

    Re: Alternate Layouts for Mark III Chassis

    Post by denny9167 on Fri Apr 12, 2013 3:10 pm

    TN Allen wrote:Here are two images of what I have in mind. The overall length would be about 11", the width 7". I'd make the chassis out of a combination of 1/4" Aluminum plate(top & bottom), and a wood frame similar to the last images below. I'm curious about the approximate diameter of the KT 88 tubes.

    I haven't quite figured out including images, so here are links to Flickr files:

    http://www.flickr.com/photos/68227271@N04/8642572189/in/photostream
    http://www.flickr.com/photos/68227271@N04/8643670706/in/photostream
    http://www.flickr.com/photos/68227271@N04/8642661151/in/photostream
    http://www.flickr.com/photos/68227271@N04/8643686006/in/photostream

    That would be a really nice layout

    TN Allen

    Posts : 124
    Join date : 2013-01-01

    Re: Alternate Layouts for Mark III Chassis

    Post by TN Allen on Mon Apr 15, 2013 8:41 am

    I was reading about transformer placement in another forum, one contributor suggests that they should be at 90 degrees to each other. If so, how far apart should they be if they are not at 90 degrees.

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