SingleCut's DIY Amp Build

Discussion in 'The Squawk Box' started by hipofutura, Apr 26, 2011.

  1. hipofutura

    hipofutura Senior Member

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    I returned from last Saturday's N.E. MLP meet with an old busted-ass amp of SingleCut's. No cab, no speaker, and no sound. I'm going to morph it into something very cool (I hope) and send it back to him.

    It's a 6V6 PP with an octal 6SJ7 preamp tube and octal 6N7 P/I. The amp is very well constructed and has gone through at least two modifications and some repairs. I found a couple broke connections which would explain why it didn't work. My guess is that it was built in the 60's. It appears to be part of a larger assembly and was then modified for recording use. Was probably in a studio at one point.

    The Stancor trannys are very nice. The unloaded HV is 785 VAC. Right off the dial! The chassis is way under-spec and has sagged from the weight of the trannys, but it will work fine for the new build. The Sprague Atom filter caps are very nice, but also very old.

    I'm going to rebuild to the power supply and power amp back to the original design, but with new components (for the most part). I already have the preamp and P/I designed. Going to use conventional 9 pin 12AX7 tubes. I'll build an eyelet board and re-arrange the tubes to make everything fit.

    First order of business is to clean up everything and fresh paint.

    The following pics show the starting points.

    I'll post updates and pics as it starts going back together.


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    rykus, Alex_SG, rocknhorse1 and 2 others like this.
  2. Case24

    Case24 Senior Member

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    Was this the dumpster find amp? Can't see the pics, Hip.
     
  3. rocknhorse1

    rocknhorse1 Senior Member

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    Yeah, this was Single's dumpster score. Very cool Don:thumb: Can't wait to see this take shape. This one will actually get to leave the house too!!:laugh2:
     
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  4. singlecut

    singlecut Senior Member

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    i'm very happy don offered to work on my project. i had the extreme pleasure to see and play his amps and gotta say, very impressed.
    g-man beat me to one or it would have been mine.
    don tells me he can turn this into something and i believe him after seeing and hearing his work.
    i'm really excited and honored to have him accept the challenge.
    i've also asked him to build me one of his killer aged tweed cabs. that is depending on his decision that the final result desrves one.
    anyway, thank you don, i will follow this very closely and i PROMISE not to be a pain in the ass. when it's ready , then it's ready. untill then, THANK YOU!!!!
     
  5. hipofutura

    hipofutura Senior Member

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    Case, must be some web/browser filtering at your end. I can see the pics.

    Don't tell SC, but once this things running it's going on ebay. I'll just tell him it detonated so I used it for parts. :laugh2: :laugh2:
     
  6. aneas fool

    aneas fool Senior Member

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    Don your cruel ...scamming SC so you can flog when its done...LOL ... I think its a great jester doing this project for SC ...your one cool guy............JIM
     
  7. hipofutura

    hipofutura Senior Member

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    Thanks Jim. Very kind of you to say.

    I really do believe in Karma. I've been blessed beyond measure, and many people have done generous and wonderful things for me. Only fitting, I do the same. But if CS's wife throws him out for dragging another amp home, he's not moving in with me!
     
  8. rocknhorse1

    rocknhorse1 Senior Member

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    Don, I cant see the pictures either.:hmm:
     
  9. hipofutura

    hipofutura Senior Member

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    I just reloaded the pictures. Is it any better?
     
  10. Tuya Customs

    Tuya Customs Senior Member

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    Hey Rosco, if you're not going to use those octals can I buy them off of you? The phaez bassman randy is building is going to use octals.
     
    singlecut likes this.
  11. singlecut

    singlecut Senior Member

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    if don dosen't need them you can haVE them. just pay don for shipping.
    or what ever he needs to take the time to ship them to ya
    i'm out of it. don is doing what he thinks is right. so if he's says they are not for this amp. please enjoy
     
  12. singlecut

    singlecut Senior Member

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    i just checked with my better half,all she said was " as long as your happy baby"
    i'm a lucky S.O.B.
     
  13. singlecut

    singlecut Senior Member

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    this is so cool. I'm a bit taken back. Don you are the man
     
  14. hipofutura

    hipofutura Senior Member

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    Tuya, PM me your address and I'll send them down.
     
  15. G Man

    G Man Senior Member

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    Very sweet Don. Now I don't feel so bad about beating SC out of the tweed homebrew as it looks like he will have his own of sorts. Looking forward to watching your progress on this one.
     
  16. BillB1960

    BillB1960 Senior Member

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    Good lord! Is it just me or is that some serious iron?!

    I'm thinking you could run a locomotive with those trannys.
     
  17. hipofutura

    hipofutura Senior Member

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    You are right, Bill. It's the biggest PT I've worked with, other than hifi iron. I don't know what's up with that choke! Never seen anything like it. Ain't no DC going to get past that thing. I'm curious to see what it does to the B+ voltage.
     
  18. Tuya Customs

    Tuya Customs Senior Member

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    Wow thanks you thats really cool of you :thumb:
     
  19. rocknhorse1

    rocknhorse1 Senior Member

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    I didn't know those were for sale??!! I would have given cash on the spot for the "Soul Tramp"!!!! Damn, you are a lucky bastard Gman.:applause:
    I can see the pics now Don, thanks.
     
  20. hipofutura

    hipofutura Senior Member

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    I didn't either! Just kind of happened. Both G-man and SingleCut asked about buying the amp, and all I could do was babble.

    I may sell the other two tweed Champs I had there. That would make room for more builds. I still have several others (without cabs) in a closet.

    "Soul Tramp"..... What a great name!

    I really really don't want to sell the Stephens alnico, but it's such an integral part of the amps tone. They rarely show up on ebay and they're $200 when they do. I may pick up another, when available.
     

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