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    Inexpensive Line Voltage changer

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    terry37932

    Posts: 19
    Join date: 2011-05-19
    Location: Knoxville

    Inexpensive Line Voltage changer

    Post by terry37932 on Tue Jun 07, 2011 9:01 am

    All,

    I found this link while surfing the net, I'm not sure who the author is but I found it interesting none the less. If your like me and have your origional Dynaco Power Transformers you might find it worth actually doing. Radio Shack has the equivlent transformers for about $12.99ea.

    http://www.angelfire.com/electronic/funwithtubes/Buck_Boost.html

    Comments?

    Terry

    captn

    Posts: 14
    Join date: 2010-01-17
    Location: Coastal Virginia

    Re: Inexpensive Line Voltage changer

    Post by captn on Tue Jun 07, 2011 3:32 pm

    This is from Max Robinson's Web site. I believe he was a Physics Professor and he posts information about tube and solid-state audio projects as well as other things. Definitely worth a look as he has a lot of info about tube amplifiers.

    tubes4hifi
    Admin

    Posts: 983
    Join date: 2008-11-30

    Re: Inexpensive Line Voltage changer

    Post by tubes4hifi on Wed Jun 08, 2011 11:40 am

    interesting article, I think I saw it a few years ago. The extra transformer is too big to fit into a Dyna ST70.
    The "poor-man's variac" costs about $65-70, about what I paid for the real variac I use,
    see this page for a decent variac at a great price:
    http://www.allelectronics.com/make-a-store/item/SC-3M/3-AMP-VARIABLE-TRANSFORMER//1.html

    Sal

    Posts: 222
    Join date: 2009-02-05
    Location: Central New Jersey Dynaco-ST70.com

    Re: Inexpensive Line Voltage changer

    Post by Sal on Wed Jun 08, 2011 6:56 pm

    I have built many bucking transformers with slow starts and ready to build another batch when I get back from my business trip in 2 weeks if you are interested.

    Sal


    Blitzen

    Posts: 41
    Join date: 2009-07-10

    Re: Inexpensive Line Voltage changer

    Post by Blitzen on Fri Jun 10, 2011 8:29 pm

    Sal wrote:I have built many bucking transformers with slow starts and ready to build another batch when I get back from my business trip in 2 weeks if you are interested.


    Is there a GFCI outlet that could be used in there that has a manual reset after a power interruption? That would be perfect...

    Sal

    Posts: 222
    Join date: 2009-02-05
    Location: Central New Jersey Dynaco-ST70.com

    Re: Inexpensive Line Voltage changer

    Post by Sal on Fri Jun 10, 2011 9:10 pm

    A GFCI outlet won't trip on a power interruption but I can install a GFCI in place of the outlet.

    Sal

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