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Millett "Starving Student" hybrid amp

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  1. iPoodz
    Pics or it didn't happen!

    Congrats.

    Silly question #(I lost count): I read tangent's DIY audio guide and realized that I've been using 60-40 solder for everything. Should I be worried about the longevity of the amp, as a result?
     
  2. UKToecutter
    I wasn't going to bother as they all look the same built from the kit but anyways. Here you go.............

    [​IMG]

    [​IMG]

    By the way...

    Tom, you are the man.

    The kit is beautifully packed and complete.
    Tubes are nicely match and no microphonics.

    And you have the patience of a saint.

    Thank you
     
  3. the_equalizer
    Quote:

    Originally Posted by UKToecutter /img/forum/go_quote.gif
    I wasn't going to bother as they all look the same built from the kit but anyways. Here you go.............
    <snip>

    By the way...

    Tom, you are the man.

    The kit is beautifully packed and complete.
    Tubes are nicely match and no microphonics.

    And you have the patience of a saint.

    Thank you




    Great pics ! nice looking pair of GE tubes.... man, all these pics make me miss my beezar.com SSMH....

    cheers!
     
  4. Llama16
    Great pics indeed and well done on the amp,
    and it never gets tired to look at some beautiful work.
     
  5. tomb
  6. skkhai
    My contribution.

    [​IMG]

    Building it went smooth except one of the original 2 LEDs was DOA. Ended up ordering more and just finished switching the bad LED out. (I ordered 10 LEDs for this and another project but was actually sent 11, makes up for original one that was DOA [​IMG])

    Can't wait until the next project... Kudos to Tom for a great kit.
     
  7. iPoodz
    How pretty! Are those white or blue LEDs?

    Tom, I didn't want to hijack the other thread more than I already did, but I wanted to thank you for your amazing advice. I was a little skeptical of the idea of adding solder to the joint, but I tried it anyway. The results were phenomenal.

    Before (here you can see the cracked ceramic on the gain resistor {I think that's what it is}. Worth replacing?):
    [​IMG]

    After:
    [​IMG]

    The pics don't do it justice, but except for the flux everywhere, it looks like there was nothing there before. Anyways, it's off-topic, but I'm just so grateful. This was surprisingly my favorite part of the build.
     
  8. UKToecutter
    Personally, I would replace the resistor even if it measured correctly.
    It isn't worth taking the chance of a failure later.

    My 2 cents worth (about the same cost as the resistor, nearly)

    :)
     
  9. tomb
    Quote:

    Originally Posted by UKToecutter /img/forum/go_quote.gif
    Personally, I would replace the resistor even if it measured correctly.
    It isn't worth taking the chance of a failure later.

    My 2 cents worth (about the same cost as the resistor, nearly)

    :)




    Yep - I agree with that.
     
  10. iPoodz
    Quote:

    Originally Posted by UKToecutter /img/forum/go_quote.gif
    Personally, I would replace the resistor even if it measured correctly.
    It isn't worth taking the chance of a failure later.

    My 2 cents worth (about the same cost as the resistor, nearly)

    :)




    Quote:

    Originally Posted by tomb /img/forum/go_quote.gif
    Yep - I agree with that.



    Okay, I definitely will, then. I ordered a few from Mouser, and I'm feeling pretty good about my desoldering skills now, so I'll do it in a few hours [​IMG]
     
  11. Narwhalius
    Hi all.

    Just finished up my build. Awesome kit by the way.

    [​IMG]

    This was my first experience with amps and soldering and I had a lot of fun building this. Originally I miswired one of the LED's so I took it apart and got that fixed. The music sounded awesome before I took it apart but when I put it back together I didn't get any sound in the left ear. Took it back apart again and everything looked fine, no wired touching, nothing that I could see that would cause this. So what should I do to fix this and what could be the cause?
     
  12. the_equalizer
    Quote:

    Originally Posted by Narwhalius /img/forum/go_quote.gif
    Hi all.

    Just finished up my build. Awesome kit by the way.

    <snip>

    This was my first experience with amps and soldering and I had a lot of fun building this. Originally I miswired one of the LED's so I took it apart and got that fixed. The music sounded awesome before I took it apart but when I put it back together I didn't get any sound in the left ear. Took it back apart again and everything looked fine, no wired touching, nothing that I could see that would cause this. So what should I do to fix this and what could be the cause?




    Congratulations! Great pic and a nice, clean build. I'd just point out that you installed the end panels and the bezels reversed. Here's the pic TomB posted a few pages back in the thread.

    [​IMG]

    As to the no sound issue, if the mute channel tube lights up and the MOSFET heats up, it could be the wiring from the RCA jack to the input block, or some cold solder joint along the way. Good luck debugging !

    cheers!
     
  13. Narwhalius
    Ah thanks for the pic. Wasn't really sure which way they were supposed to go so I just put em on. Though I gotta say I do like kinda like how it looks now. As far as the tube, yes it does light up and the MOSFET gets warm. I'll take another look at the solder joints. Thanks again.
     
  14. iPoodz
    I was listening to my amp, and it was sounding nice, then I heard a bit of crackle in the left channel, and suddenly, it sounded like the sound broke through, and was a lot louder/cleaner. It has yet to happen to the right channel. Is this normal/expected? I know that this needs a bit of burn-in time, but I didn't think it would be as pronounced as that.

    EDIT: I left the amp running for an hour or so, and I don't notice it anymore. So, nevermind [​IMG]
     
  15. Dunceiam
    Still having trouble with the SSMH P2P I'm building,

    Symptoms:

    One tube lights up as expected, the other is VERY dim.
    Zero audio coming out of the amp. Not even crackling.
    When you flick the switch, the LED flashes three times at the same rate in this video. But then stops, and the tube's begin to glow after it stops.

    I've been checking and reflowing all the connections, the MOSFET's do indeed heat up now that I've used the Bergquist pads/mounting kit.

    Any ideas? (Old, but largely the same) photos are here.
    http://www.head-fi.org/forums/f6/mil...ml#post6380448

    Thanks!

    Also, is this the correct pin placement for the pot? With the shaft pointing away from you, pins pointing down, the left row is ground, middle row is input, right row is the output?
     
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