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[SripBoard Design] Starving Student Millett Hybrid Vacum Tube Amp - Page 10

post #136 of 256
8/22/11 at 8:47pm
Thread Starter 

Sounds Good thanks. An model in mind from Mouser?

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post #137 of 256
8/22/11 at 9:12pm

567-657-15ABP

thats the standard starving student heatsink spec'd by pete. 

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post #138 of 256
8/23/11 at 4:45am
Quote:
Originally Posted by TestSubject View Post

Ever dreamed of driving a batmobile?


But of course! biggrin.gif

BTW, I am not saying that heat sink will not work, just be cautious. The wood case will not provide any thermal assistance as a metal case would. Most CPU heatsinks are designed for size and reach their performance by using a fan, which, you really want to avoid in this application. Since you will be externally mounting the sink, it might be perfectly suited for the build.

Besides, I like the whole repurposing aspect of using it. It looks good as well. cool.gif
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post #139 of 256
8/23/11 at 7:08am
Thread Starter 

Got my tubes:

 

photo5.JPG

 

Got both for 8$ Not tested salvage from old electronics. A bit worried that they wont work...

 

Plus the probably wont "Match" sound wise right? Also on is VII-7 and the other is IX-3.

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post #140 of 256
8/23/11 at 7:39am
Thread Starter 

About the Heat sink, i looked on mouser for an alternative that would lay flat and bolted to the back of the case (I dont really like them sticking out the top with the tubes) but i had no luck.

 

Any ideas?

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post #141 of 256
8/23/11 at 7:40am

The tubes may work fine, I mean you might as well test them (once your amp is built) since you have them already.

 

I have also wanted to drive a batmobile biggrin.gif

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post #142 of 256
8/23/11 at 7:17pm
Thread Starter 

Would someone consider taking the time to modify the design for a single tube version of this since one full tube is used per channel.

 

I made a very quick sketch just to illustrate the idea but again i am not qualified enough to make this work. Pay only attention to the cabling, I know the layout of some of the components is wrong and everything should be fixed up in Rev 3.6.2

 

1000x500px-LL-998e539b_Screenshot2011-08-11at12.17.40PM.png

 

Rev 3.6.2(Could use someone checking again the layout. Cant thank you people enough):

 

1000x500px-LL-587283e1_Screenshot2011-08-14at4.45.53PM.png

 

And here is the schematic (why not?)

3f487324_d98bb1fb_SSMH-12AU7.gif


Edited by TestSubject - 8/26/11 at 7:03pm
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post #143 of 256
8/25/11 at 4:44pm

This particular amp would need some changes to really have something that would work well. 

Something like one of the following amps...

http://diyaudioprojects.com/Solid/Tube-Mosfet-Hybrid-Headphone-Amp/

or

http://diyaudioprojects.com/Solid/12AU7-IRF510-LM317-Headamp/

 

...where the heater string is removed from the output series, and just used "normally."

 

I can't seem to find the reference where I was reading about it(Beezar maybe?), but suffice it to say that just dropping 6v(using the center tap on the 12au7 heater) on the output string(while still retaining the 48v power supply used here) would be a bit much on the mosfet. It would make a good project to learn more.

 

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post #144 of 256
10/3/11 at 8:52am

Hey TestSubject, any updates of your project yet? I like the work you've done so far. I am not currently concerning myself with construction of a starving student amp, but I like those stripboard drawings you made. What software did you use?

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post #145 of 256
10/3/11 at 9:01am
Quote:
Originally Posted by dkong View Post

Hey TestSubject, any updates of your project yet? I like the work you've done so far. I am not currently concerning myself with construction of a starving student amp, but I like those stripboard drawings you made. What software did you use?

 

 

I believe he is using diylc
 

 

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post #146 of 256
11/21/11 at 4:42pm
Thread Starter 

People, I am not dead, something happend to me though, School happend.

 

Got all the parts right here (BIG thanks to digger945) but time is an issue right now. Like many people suggested i need to review my layout since the caps are big (doing that now)

 

Anyone had problem with DIYLC crashing 2-3 times every minutes (MAC)? Makes things very hard as you might imagine.

 

Will keep you posted.

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post #147 of 256
11/21/11 at 5:14pm

what version are you using? i have 3.0.9 and it seems to be working fine

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post #148 of 256
11/22/11 at 1:48am
Quote:
Originally Posted by TestSubject View Post

People, I am not dead, something happend to me though, School happend.

 

Got all the parts right here (BIG thanks to digger945) but time is an issue right now. Like many people suggested i need to review my layout since the caps are big (doing that now)

 

Anyone had problem with DIYLC crashing 2-3 times every minutes (MAC)? Makes things very hard as you might imagine.

 

Will keep you posted.


I had it crashing in Linux also, but not so often. Was crashing every 10 minutes, but without crashing it getting unusable after a few minutes (i can modify some values because the drop box is disappearing or other strange thing happens)

 

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post #149 of 256
11/24/11 at 8:32pm

Hi guys. I just made an account to ask a question here as i'm confused... I like the awesome strip board layout and may be using it to make mine. Looking at the REV 3.6.2 and comparing with the schematics, isn't the R6 and R12 supposed to be connected between line out and ground? Thanks in advance..

 

Update:

I've copied the REV 3.6.2 and made another one with a few changes to confirm i'm reading your layout right.. I'm not so sure about this because i'm just a newbie but i'm willing to learn so, if you see any problem, do tell me. Thanks.

 

Starving Student 12AU7 Done Layout.png

[Click image to enlarge]


Edited by BangDead - 11/24/11 at 10:19pm
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post #150 of 256
12/8/11 at 1:31pm
Thread Starter 

Hello everyone,

 

3.7 is here this time with proper scale. 3.7.1 will be more detailed. DIYLC was very annoying, crashing non stop. The Windows version seems to be better.

 

Cant wait to solder everything up

 

Thanks BangDead Fixed R6 R12

 

If anyone cares to check the design to make sure, that would be good.

3.7.jpg

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Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › [SripBoard Design] Starving Student Millett Hybrid Vacum Tube Amp