1. Win a Broadcaster or one of 3 Teles! The annual Supporting Member Giveaway is on. To enter Click Here. To see all the prizes and full details Click Here. To view the thread about the giveaway Click Here.

BIG SE Transformers

Discussion in 'Shock Brother's DIY Amps' started by Jammin'John, Feb 24, 2014.

  1. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
    Are there any good sources for SE Transformers.........BIG Ones ?
    Were any of the organ amps single ended ?

    OT spec: Pri=1250 ohm, 8 henry minimum,
    Sec=4, 8, 16 ohm or what ever,
    120ma bias, 20w minimum.

    PT = 300-0-300, 141ma minimum, 6.3v.

    Any good chassis sources ?

    thanks,
    JJ
     
  2. andyfromdenver

    andyfromdenver Friend of Leo's

    Posts:
    4,703
    Joined:
    Dec 21, 2011
    Location:
    grandpa's
    Check out these guys. I have one for a 6v6 or 6l6 single ended. Just waiting for the right pre section idea. Like king kongs testicles! http://www.transcendar.com

    *edit* I'm sorry I missed all the specs you posted. They may have something you want :)
     
  3. Fred Mertz

    Fred Mertz Tele-Afflicted

    Posts:
    1,440
    Joined:
    Nov 11, 2011
    Location:
    Indiana
  4. laird

    laird Tele-Holic

    Posts:
    741
    Joined:
    Jul 8, 2009
    Location:
    Palm Harbor, FL
  5. 6942

    6942 Poster Extraordinaire

    Age:
    67
    Posts:
    6,333
    Joined:
    Apr 15, 2006
    Location:
    Santa Fe, NM
    Dirty Dawg Amps......................................................

    I've been purchasing his Aluminum chassis's for years now.
    MUCH better quality than the thinner Hammond aluminum chassis's and cheaper too.

    NO affiliation!


    EDIT: Apparently Dirty Dawg is out of the chassis business, due to a recent fire. :(
    Too bad.....he made a fabulous amp chassis!!


    Steve
     
  6. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
    Sux

    That's a short story steve. Did no one pick up the business ?

    JJ
     
  7. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
    No Way

    No,those won't work.

    thanks,
    JJ
     
  8. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
    No Cigar

    Close,but no cigar ! ;)
    The first have the wrong primaries & the second only have one speaker tap.
    I want at least 4 and 8 ohm.

    thanks,
    John
     
  9. 6942

    6942 Poster Extraordinaire

    Age:
    67
    Posts:
    6,333
    Joined:
    Apr 15, 2006
    Location:
    Santa Fe, NM
    Dirty Dawg posted a picture of his burnt out work shed, on his web-site.
    Looks like there was nothing left of the business, to 'pick up'?
     
  10. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
  11. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
  12. Fred Mertz

    Fred Mertz Tele-Afflicted

    Posts:
    1,440
    Joined:
    Nov 11, 2011
    Location:
    Indiana
    Angela Instruments is a Hammond dealer. If they don't have the transformer in stock, they can order it. I am not affiliated with Angela other than as a customer.
    http://angela.com/

    I think that Hammond makes good quality transformers. It's tough to find big SE output transformers at a competitive price. You could spend a lot more for a transformer of lesser quality.
     
  13. 6942

    6942 Poster Extraordinaire

    Age:
    67
    Posts:
    6,333
    Joined:
    Apr 15, 2006
    Location:
    Santa Fe, NM
    Brian of Dirty Dawg amps, says he hopes to resume aluminum chassis production by the end of this year.

    Hopefully, that will come about?
    As it is a win-win scenario for him....and us.
     
  14. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
    Too Late

    Well,that's good. :D
    Too late for me though.I want my project to come together over the next couple of months.

    JJ
     
  15. 6942

    6942 Poster Extraordinaire

    Age:
    67
    Posts:
    6,333
    Joined:
    Apr 15, 2006
    Location:
    Santa Fe, NM
    I've used EDCOR GXSE transformers in quite a few amplifier builds.
    At around $27 each (plus shipping), I think they are a smokin' bargain!!
    The downside is.....expect to wait 3-4 weeks for delivery.
    Downside for ME?
    I live in New Mexico and have to pay NM TAX on the New Mexico-made EDCOR transformers.
     
  16. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
    They only have single speaker taps.4,8,or 16.
    The one for my project is $90.

    JJ
     
  17. laird

    laird Tele-Holic

    Posts:
    741
    Joined:
    Jul 8, 2009
    Location:
    Palm Harbor, FL
    Big SE transformers are going to be big money, there's no way around that. Lots of iron, lots of wire; that's one of the reasons why high-wattage amps are push-pull. Few of them are multi-tap; generally speaking if you're building an amp at this power level it's assumed you know what load you're planning on pushing. :)

    Hammond makes the 125FSE (20w) and 125GSE (25w) in multi-tap configurations. They do not offer ultralinear taps. Frequency response is narrow at 100hz-15khz. expect to pay about $100 plus shipping for those.

    After that you're getting into hi-fi territory, like the Hammond 1640SEA, which hits your specs directly on the head, multiple taps included. They appear to be going at around $150 plus shipping.

    Or, if you know your output load, the Edcor CXSE line is on par with the 1640SEA, but at $90 plus shipping.

    -Laird
     
  18. Jammin'John

    Jammin'John Friend of Leo's

    Posts:
    2,030
    Joined:
    Mar 20, 2003
    Location:
    Tug Hill Plateau
    How could the Edcor be as well made as the Hammond 1640sea ?
    There must be some construction details and materials used to come in that cheaply.
    For one thing the Hammond weighs 11 #'s,the Edcor 9.75 #'s.

    thoughts ?

    JJ
     
  19. laird

    laird Tele-Holic

    Posts:
    741
    Joined:
    Jul 8, 2009
    Location:
    Palm Harbor, FL
    Edcor does direct sales and a rotating schedule of Just-In-Time (JIT) supply chain manufacturing... highly efficient, keeps the production costs down quite low. The downside is you often have to wait a few weeks to get transformers from them. Hammond transformers are made in Canada and imported to the states through distributors, which adds a lot of overhead.

    The 1640SEA is rated for 30W vs the CXSE's 25W, which corresponds with the difference in mass.

    I have a lot of Hammond and Edcor transformers, probably 10 of each. Any quality difference between equivalent products is negligible. I definitely can't hear any difference between equivalently-rated OTs, and I have A/B'd a few. If anything I'd lean toward Edcor on PTs just because their claimed vs. actual voltages have been more accurate than Hammond's.

    -Laird
     
  20. Keyser Soze

    Keyser Soze Tele-Holic

    Posts:
    948
    Joined:
    Oct 13, 2009
    Location:
    Johnson City, TN
    That is why nobody makes big SE trannys.

    Aside from being big, they cost big, especially for cost per watt of output.

    Push pull efficiency being preferred for almost all applications.

    Guitar amps really are a niche.
     
IMPORTANT: Treat everyone here with respect, no matter how difficult!
No sex, drug, political, religion or hate discussion permitted here.