[SripBoard Design] Starving Student Millett Hybrid Vacum Tube Amp | Page 5 | Headphone Reviews and Discussion - Head-Fi.org

Fred_fred2004 · Jul 27, 2011 at 1:59 AM

Quote:

testsubject said:
@ NikonGod, Thanks a lot!

@Zammykoo Well hope that my layout will help you if you choose the Protoboard way.

Here is V3.4:

Hope to get building soon!

Sorry the pots are wired wrong the wipers should go to the amp

cheers
FRED

TestSubject · Jul 27, 2011 at 10:26 AM

Thanks! here is V3.4.1:

DarkWinter · Jul 27, 2011 at 11:34 PM

This looks Great I might make one depending on how yours turns out XD

TestSubject · Jul 28, 2011 at 8:26 PM

Sure this is the reason i post here to help people like me who want a Stripboard design instead of p2p.

digger945 · Jul 28, 2011 at 9:22 PM

The little squares with red dots are supposed to be cuts in the traces?

TestSubject · Jul 28, 2011 at 9:31 PM

Yes that's right.

digger945 · Jul 28, 2011 at 9:51 PM

Assuming the bottom pins on the mosfets are Source, then the top pins would be gate.
Top to bottom.....
Gate
Drain
Source

You can just swop the wires if we want to understand that the drawing is not correct.

digger945 · Jul 28, 2011 at 9:56 PM

R8, 390k from +48v to the lower mosfet Gate(assumed the center pin on the drawing)

digger945 · Jul 28, 2011 at 10:05 PM

R7, 33k from +48v to the plates of lower 12au7(pins 1 and 6)

We can assume that the traces will be cut beneath C2 and C4 before mounting.

Move C5 and C5a down one pin, so they couple the lower mosfet source pin with output Right.

digger945 · Jul 28, 2011 at 10:09 PM

The little squares with red dots to the far right, next to the output.
Move the upper one up one trace.
Move the lower one down one trace.
So that they are blocking/terminating the trace with the center pin on the mosfets.

digger945 · Jul 28, 2011 at 10:15 PM

R6 should be connected directly from Ground to the left output.

R12 missing, should be same 2k directly fro Ground to right output.

digger945 · Jul 28, 2011 at 10:17 PM

Ok, why don't you redraw and we can take up the rest of things tomorrow. I gotta hit the sack for tonight.

TestSubject · Jul 28, 2011 at 10:27 PM

Sounds great thanks again!

zammykoo · Jul 28, 2011 at 11:52 PM

Wow, stripboard layouts seem harder to follow than pcb, but I look forward to seeing the revised design. Looks like you got this round taken care of.

TestSubject · Aug 7, 2011 at 3:03 PM

Hello,

I Havent been very well for the past week, but here is an update, I am about to order the components

A couple things are bugging me, for one, the price, 63 Euros, thats about 90$.

2) of all the recomanded brand for caps only wima was available, is it worth it sice i cant get the other good brands?

3) 33k Ohms resistors are only available at 1/2 watts

4) no 50 K available

5) MOSFETS IRF510 are not available, any alternative?

6) only stereo 50 K Pot is at 17 euros/ 25$ i mean really? looks good but...

The Psu and tube sockets are ordered.

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