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Bijou All Tube Futterman Headphone Amplifier - Page 93

post #1381 of 3981
9/25/08 at 11:17pm
Quote:
Originally Posted by adamus View Post
chaps, my first impressions can be seen here:

http://www.head-fi.org/forums/f5/rev...iy-amp-365749/

Again - Runeight, cant thankyou enough for all the contribution.
You're welcome. Thanks for taking time to build it.
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post #1382 of 3981
9/25/08 at 11:36pm
Quote:
Originally Posted by amphead View Post
Pabbi, the eagle has landed. The new chassis arrived yesterday, and will make the balanced configuration a whole lot easier. Even though I immediately could see the best layout option, the elevator engineer brother-in-law will get to put in his 2 cents tonight, when I go there for dinner. Thank you very much for the mystery box. Well I guess I'll be Geraldo Rivera and reveal your generosity to the members here. It's a balanced Starving Student. Can't wait to get your amplifier into it's new configuration. ;-)
Always look the gift horse in the mouth... ;-)

That said, there are also enough other parts to build another one or two, save the tubes and warts. It was really addition by subtraction for me (one less distraction) and needs some attenuation as well as modding - but, you will have the only one in the world - should you so desire to keep it that way. It also got all those parts away to keep me from considering yet another build.

Here's to hoping the new case lays out as pretty as planned, and kills the nasty hum of the Nabu..
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post #1383 of 3981
9/25/08 at 11:48pm
oh my...well disabling NFB sure makes a night and day difference with high ohm headphones I wanted to toss my week old hd650's in the trash until about an hour ago
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post #1384 of 3981
9/26/08 at 12:01am
If you're sure you'll be listening with high Z phones, no NFB is the better option.
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post #1385 of 3981
9/26/08 at 1:31am
indeed, the increased quantity/impact of both bass and trebel are very pleasing, but now my bijou is perma tuned into a local radio station...lol. Time to bust out the shieled mic wire.
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post #1386 of 3981
9/26/08 at 3:06am
when i had a slightly noisey usb signal, no nfb made it a lot worse - I could dial it out with NFB.

My review shows my preference for very little NFB, but just a tiny bit seems to give it a slightly warmer presenation.
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post #1387 of 3981
9/26/08 at 6:28am
Yes, I think both running without NFB, or with minimal NFB are the best options. It depends on your phones and personal taste.

Pabbi, I have mounted the xformer into the new chassis, and tomorrow I will cut an opening for the power switch/iec, and install it. We are on our way. Edit: out of superstition, the transformer is mounted with iron facing the boards instead of the bell end.
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post #1388 of 3981
9/26/08 at 6:55am
chassis arrived today, right on time. i also pre-drilled all holes on the bottom plate for a balanced build. 8 hrs of work...see the attachments below. constructive criticism appreciated - this is my first tube amp.

listened with the K701 and iPod via headphone jack (i don't have a LOD) for a short bit.


WOW!

i can't wait until i can get this boxed up for some extended plays. i will post more then about the sound. but as it stands now, i've never heard music sound like this before - it's alive and breathing. crazy tone detail as well.

PACE
LL
LL
LL
LL
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post #1389 of 3981
9/26/08 at 9:01am
Quote:
Originally Posted by fishski13 View Post
chassis arrived today, right on time. i also pre-drilled all holes on the bottom plate for a balanced build. 8 hrs of work...see the attachments below. constructive criticism appreciated - this is my first tube amp.


PACE
Nice job. There might not be enough holes in the lid, as it really kicks out the heat with extended play.
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post #1390 of 3981
9/26/08 at 10:05am
Quote:
Originally Posted by huskydawg9 View Post
Nice job. There might not be enough holes in the lid, as it really kicks out the heat with extended play.
I think the lid would fall apart if it had any more ventilation holes..
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post #1391 of 3981
9/26/08 at 11:13am
Quote:
Originally Posted by JamesL View Post
I think the lid would fall apart if it had any more ventilation holes..
What I meant was when you go balanced and have 2 trannys and 3 more boards in there...you may have to run with the top off.
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post #1392 of 3981
9/26/08 at 11:25am
I think it will stuggle with any more than mesh. there is a lot of heat generated.

Edit - Actually, you may be fine with that top you have, looks very well ventilated. Maybe some larger cutouts in the base would help though. 6n6p's kick out a lot of heat.
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post #1393 of 3981
9/26/08 at 11:58am
looks good fishski13. The wiring looks exceptionally tidy, what are those little plastic wiring guide thingies you are using?
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post #1394 of 3981
9/26/08 at 12:17pm
gents, my top plate is coming on well. I am using a couple fo deconstructed valve protection frames ad decorative washers. Just need to find some nice stainless hex bolts.

Heres a sneak preview

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post #1395 of 3981
9/26/08 at 1:04pm
Gents, these new amps of yours all look very nice. They harken back to the days when tubes were king.
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