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Mini Millet Tube Amp

post #1 of 66
6/2/08 at 1:26am
Thread Starter 
This is my implementation of Pete Millet's clever hybrid amp design:
Starving Student




All wiring is silver plated copper. All resistors are Dale Vishay. The coupling caps and bypass caps are Wima mkp. All power caps are Nichicon PW. The output caps are Nichicon Muse ES bypassed with wima mkp. The gain switch is a Carling 2m1 DP-1. The pot is Alpha 5j3. The LEDS are Avago HLMP-EL16-VY000. The Phone jack is Switchcraft RN112BPC.


*This post has been re-edited many times as the design has come along, so comments below may not apply
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post #2 of 66
6/2/08 at 1:52am
That is beautiful! How does it sound with full-size cans?
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post #3 of 66
6/2/08 at 3:09am
Can it be ordered from somewhere? Cost? Sound? Can it drive more than those Koss KSC75's? Looks nice.
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post #4 of 66
6/2/08 at 6:33am
Quote:
Originally Posted by juniperlater View Post
That is beautiful! How does it sound with full-size cans?
X2! It looks very appealing in such a small package. I'd be very interested in how to get one, and how they fare in driving full-sized cans.
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post #5 of 66
6/2/08 at 6:42am
Thread Starter 
Quote:
Can it be ordered from somewhere? Cost? Sound? Can it drive more than those Koss KSC75's? Looks nice.
I built this myself.
It sounds very nice, but I haven't had a lot of time to listen to it yet.
I put the Koss there to give an idea of the size. This amp has a lot of power and will have no problems driving just about any headphones.
Those green terminals in the bottom picture hold the gain resistors. So it can be optimized for whatever it's powering.
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post #6 of 66
6/2/08 at 7:16am
Beautiful. You make a fellow Canadian proud.

Does it have diamond buffers? (Not sure if they would fit.)
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post #7 of 66
6/2/08 at 8:10am
is this the new starving student model?
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post #8 of 66
6/2/08 at 8:14am
Quote:
Originally Posted by NoPants View Post
is this the new starving student model?
Yep.
RDS: Nice looking build, but not exactly "starving" on the Hammond 1455 case
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post #9 of 66
6/2/08 at 8:41am
Thread Starter 
Quote:
RDS: Nice looking build, but not exactly "starving" on the Hammond 1455 case
I was thinking "starving student: saturday night" might be appropriate.
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post #10 of 66
6/2/08 at 9:45am
Yes, it's the Starving Student Hybrid and is an open source DIY design. More details can be found in the DIY forum.

rds: nice work, but you might not want to advertise that you'll be building more unless you're looking to pick up an MOT tag.
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post #11 of 66
6/2/08 at 12:39pm
I thought the starving student was the original old design. It is all PTP wiring right?
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post #12 of 66
6/2/08 at 12:54pm
Quote:
Originally Posted by m0b1liz3 View Post
I thought the starving student was the original old design. It is all PTP wiring right?
It's still pretty NEW - maybe a month (officially)? There's also nothing in rds's work there that would qualify as non-PTP: a perfboard is not a PCB.

By the way, nice job, rds!!
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post #13 of 66
6/2/08 at 1:07pm
looks great and a real small foot print.

What tubes are you using?
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post #14 of 66
6/2/08 at 1:12pm
Quote:
Originally Posted by HighLife View Post
looks great and a real small foot print.

What tubes are you using?
19J6 - according to TDSL, there are no substitutes. However, since Pete Millett designed the amp to run at something less than their normal operating point, it may be possible that something else is out there - but Pete will have to tell us.
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post #15 of 66
6/3/08 at 12:55am
I want to build one if I can do it cheaply. Point to point is cool. I have an old ext hard drive case I think I could fit it into. The only issue would be the power supply since I am in Australia. Any suggestions on finding the parts? Is there a parts list and wiring schematic?
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