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Bijou All Tube Futterman Headphone Amplifier - Page 110

post #1636 of 3981
10/19/08 at 7:26pm
My ProtoBijou

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post #1637 of 3981
10/19/08 at 7:58pm
Quote:
Originally Posted by miky View Post
My ProtoBijou


What a beast! I've been trying to figure out how to layout 5 .22uF russian teflon's per channel in my setup...but just don't have the room.
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post #1638 of 3981
10/19/08 at 8:54pm
Quote:
Originally Posted by chobint View Post
So a mixture of boredom and desire to perform Regal's mod soon here, has yielded the following diagram. Would something like this work for a PSU retrofit? The orange square is a perfboard mounted using standoffs in the existing holes in the PCB, and the pink dots denote rubber feet used to support the other end of the board. That's my best thought on how to mount heatsinks without drilling any holes in the PCB.
gents, how about this board using chobint's idea of a PS add on? The pads on the board sit above the pads on the original PS except that the R7 pad had to be moved slightly so that the auxiliary board would clear C6.

I've included only two mounting holes so that you can space above the holes that are in the original PS.

If you guys are interested maybe Jeff R would be willing to make a run of these.
LL
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post #1639 of 3981
10/20/08 at 12:18am
Quote:
Originally Posted by runeight View Post
gents, how about this board using chobint's idea of a PS add on? The pads on the board sit above the pads on the original PS except that the R7 pad had to be moved slightly so that the auxiliary board would clear C6.

I've included only two mounting holes so that you can space above the holes that are in the original PS.

If you guys are interested maybe Jeff R would be willing to make a run of these.
count me in.

i just desoldered the C4-5 lytics on my fisrt PS and placed an order to Digikey for the last remaining bits. i have a pretty good idea of how i'm going to P2P this mod.

i see a balanced Bijou in the near future.
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post #1640 of 3981
10/20/08 at 12:21am
miky,
that's some craziness there.
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post #1641 of 3981
10/20/08 at 12:42am
Quote:
Originally Posted by runeight View Post
gents, how about this board using chobint's idea of a PS add on? The pads on the board sit above the pads on the original PS except that the R7 pad had to be moved slightly so that the auxiliary board would clear C6.

I've included only two mounting holes so that you can space above the holes that are in the original PS.

If you guys are interested maybe Jeff R would be willing to make a run of these.
My god it's beautiful. The holes are even lined up for use of a straight jumper wire. As long as the boards are reasonably priced (5-10 bucks) I'd be in. Otherwise perfboard ho!
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post #1642 of 3981
10/20/08 at 2:12am
Quote:
Originally Posted by runeight View Post
If you guys are interested maybe Jeff R would be willing to make a run of these.
Count me in too.

Quote:
Originally Posted by fishski13 View Post
miky,
that's some craziness there.
It's like cooking, a little vitamin Q with russian teflons
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post #1643 of 3981
10/20/08 at 6:58am
Miky, be careful with your layout. Otherwise its a trail of tears, hearing the amps beauty, but with some rework necessary to reach the finish line.

Pabbi, I just could not quite get your amp finished in time for Burning Amp, so I will be working on it Monday. Your headphones shined on the Balanced Beta22. Also I was one of a few winners of the raffle at Burning Amp, and received a 45 lb. project amp that once belonged to the venerated Nelson Pass. He also gave me 4 high power jfets to use in a project. Nelson's a very cool and savvy audio engineer/designer with a very successful audio career. Pics of Pabbi's amp and the project amp tomorrow, I need some sleep. White line fever.
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post #1644 of 3981
10/20/08 at 1:21pm
Quote:
Originally Posted by amphead
Miky, be careful with your layout. Otherwise its a trail of tears, hearing the amps beauty, but with some rework necessary to reach the finish line.
What you mean exactly? Is something wrong in this layout?
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post #1645 of 3981
10/20/08 at 1:45pm
gents, anyone tried 8416's and 6n1p's??

I ahve a selection of both, and both require some work on the amp.

Where should my preference lie?
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post #1646 of 3981
10/20/08 at 5:59pm
Well, you are in the breadboarding stage, so it's too early too tell. To get a quiet background it will usually require a metal bottom with star ground.

Quote:
Originally Posted by miky View Post
What you mean exactly? Is something wrong in this layout?
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post #1647 of 3981
10/20/08 at 6:17pm
Quote:
Originally Posted by adamus View Post
gents, anyone tried 8416's and 6n1p's??

I ahve a selection of both, and both require some work on the amp.

Where should my preference lie?
I'm not familiar with 8416's but have alternated back and forth between 6n1p's and 6h30's. Alex suggested to me a while back to put sockets on R2 to allow for easy tube rolling, and I'm glad I did. To give you an idea of the improvement, I haven't had 6922's in there since putting the sockets in. If you haven't done it already, Regal's mod makes a difference for the 6n1p's and especially 6h30's .
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post #1648 of 3981
10/21/08 at 3:05am
thanks husky, I will probably do regals mod and go for the 6n1ps.
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post #1649 of 3981
10/21/08 at 10:20am
Thread Starter 
Quote:
Originally Posted by adamus View Post
gents, anyone tried 8416's and 6n1p's??

I ahve a selection of both, and both require some work on the amp.

Where should my preference lie?
just FYI - mazuki was the only other person I know of to have used the 8416. His was a protobuild and predates any mods..dB
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post #1650 of 3981
10/21/08 at 5:03pm
Quote:
Originally Posted by adamus View Post
thanks husky, I will probably do regals mod and go for the 6n1ps.
BTW... WITH Regal's mod...

For the 6n1p R2 will be 180R.

For the 6H30 R2 will be 1k3.
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