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Millett "Starving Student" hybrid amp

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  1. pinkfloyd4ever
    Quote:

    Originally Posted by -=Germania=- /img/forum/go_quote.gif
    I mangaed to get two identical RCA tubes - sweet!



    on an order of only 2?
     
  2. dsavitsk
    still work to be done, but here's a first draft.

    [​IMG]
     
  3. malldian
    Wait what is this?
     
  4. pinkfloyd4ever
    WWHHHHAAAA?!?!?![​IMG]
     
  5. trains are bad
    I ordered 4 tubes from radiodaze and got 4 Tung-sol tubes.
     
  6. n_maher Contributor
    I think in the near future there will be PCBs available for this project. I'm not inclined to say more at this point since I don't want to provide false hope since nothing is guaranteed. Whether they end up being from dsavitsk's layout or someone else's is yet to be determined. But I'd also encourage folks to have a go at PTP'ing the amp, it really is pretty simple and half the challenge/fun is figuring out how you want to layout your amp.
     
  7. royewest Contributor
    Jeff, if you're planning to make kits available, more power to you. I rather hoped that that was the 40-tube order they were working on.
     
  8. -=Germania=-
    well - I have all of the parts here.
    Just some questions:

    How to mount the Mosfets? (like which pin is which)

    Which pin is which on the tube sockets?


    Also, I am building mine into a hammond ABS housing and was wondering what would be better to make the holes. Hot knife or drill?
    I am worried that the drill might crack the case.
     
  9. n_maher Contributor
    Quote:

    Originally Posted by -=Germania=- /img/forum/go_quote.gif
    How to mount the Mosfets? (like which pin is which)



    And on the 8th day (insert favorite deity here) created data sheets. [​IMG]

    Quote:

    Which pin is which on the tube sockets?



    Look at the bottom of the socket, many have the numbers printed there. Otherwise the tradition is that when looking at the bottom the numbers increase in a clockwise fashion and pin 1 is the first pin to the right of the notch/gap/etc. A quick google search will probably yield a better explanation.

    Quote:

    Also, I am building mine into a hammond ABS housing and was wondering what would be better to make the holes. Hot knife or drill?



    Hot knife = fail. Drilling will take patience and care but should yield much better results. It may mean drilling small pilot holes, but that's the way I'd do it.
     
  10. -=Germania=-
    I tell you I am so very sick of data sheets right now.

    I am in a microprocessor system design class and to figure out how to make your stuff, you have to read the 30 page data sheets of each chip to see how it will work and how to program the memory to get it to function. Build+program = frustration, but a great feeling when you finish and have something that works!
     
  11. trains are bad
    with a bit of googling the TO-220 mosfet, I was able to find short one page datasheets with pinout diagrams saying which one was the gate, drain, source, along with the circuit symbol.
     
  12. holland
    .
     
  13. Zigis
    Quote:

    Originally Posted by n_maher /img/forum/go_quote.gif
    I think in the near future there will be PCBs available for this project.



    Hei ! Please, don't distort this marvel tube design with PCB !!!
     
  14. n_maher Contributor
    Quote:

    Originally Posted by Zigis /img/forum/go_quote.gif
    Hei ! Please, don't distort this marvel tube design with PCB !!!



    Whether or not pcb's end up getting made will have absolutely no impact on how great this design is. It's a gift to the community and the more people the build it (via pcb or ptp) the greater that gift becomes in my opinion. I have zero tolerance for people who want to profess that the only real DIY is ptp so if that's the message you're preaching it's falling on deaf ears my friend.
     
  15. fortney
    In regard to the matter of drilling a plastic case--

    I use a cone (pencil) shaped solder tip, that I could never use successfully to solder, to melt a dimple in the selected and twice measured location on the case that I want to drill. This will let the drill tip bite right into the plastic and you won't have problems with the drill tip walking (scratching) on the surface of your box.

    Start with a small diameter drill tip and work up. Be sure to safely immobilize your box so it won't rotate with the drill.

    Ordinarily I find that the 1/4 inch bit will bind in the plastic and so at that point I go to a hand held reamer that I rotate in the hole a few times then measure with the part to be placed for fit. Go slow here so you don't make the hole a little too big.

    Carefully clean the attached shavings from the perimeter of your hole with a large drill tip or other conical cutting tool turned by hand.

    I use hand drills. Electric drills will require a little different technique.

    Good luck

    F
     
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