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Bijou All Tube Futterman Headphone Amplifier - Page 151

post #2251 of 3981
2/6/09 at 2:33am
Today, I got 4 small presents from pabbi! They'll be installed soon... report to come... hopefully I'll get my PCM1794 DAC up and running soon so I can give real impressions.
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post #2252 of 3981
2/6/09 at 3:23am
Good job guys! Work in progress.
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post #2253 of 3981
2/6/09 at 3:43am
I have about 6 LED's to illuminate. I did not want to add an additional supply so I was thinking of siphoning about 10ma (~2W) from the B+ supply. My supply will be using a Hammond 370, EZ81, and the Regal's Mod. Can anyone think of a reason why this would be a bad idea?

I am mounting my EZ81 on top of the chassis and I had a difficult time finding a male connector for a standard 9-pin tube socket. I finally found something that should work very well at Apex Electronics! The existing wires are too small to use to for the tubes but the shield of the plug screws off. You can remove the existing wires and solder on larger wires onto the top of the solid pins. The mechanical connection to the pins is not the greatest but its the best I have been able to find.
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post #2254 of 3981
2/6/09 at 10:15am
After a lot of listening time, i will go back the technical side of my Bijou.

I will bye some obbligato caps and a new attenuator to replace the blue ALPS.

There is good feedback on this one: http://cgi.ebay.com/ws/eBayISAPI.dll...m=270334964045

I will rewire more cleanely my bijou. It's a mess in it and i'll replace some crapy wires and had some sheilded ones.
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post #2255 of 3981
2/6/09 at 1:38pm
Well after about 2 months of working on my Bijou, part time of course, a 2 yr. old and a 2 month old. ;-) I'm finally wiring it up. Started doing P2P but the connectors on the boards are a bit small with the 18g wire I'm using so I'm going the terminal block route.

I'm thinking I might as well get it right the first time so what wires/connections should be shielded and also is 24ga navships wire good for signals without extra shielding?

Basically looking to avoid future rewiring. Any good tips. I've read this whole thread along with headwize and I'm a bit overwhelmed with info.

I'll try and get a few pics up tonight. So close I can taste it.
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post #2256 of 3981
2/6/09 at 10:43pm
Quote:
Originally Posted by Dantes View Post
After a lot of listening time, i will go back the technical side of my Bijou.

I will bye some obbligato caps and a new attenuator to replace the blue ALPS.

There is good feedback on this one: DACT Type 23 Stepped Attenuator Potentiometer 10K 300b - eBay (item 270334964045 end time Feb-23-09 10:11:33 PST)
.
Hey Dantes, If you try that attenuator let us know your impression of how it sounds compared to the blue ALPS. I presume you know, but just in case you don't, that is not an actual DACT attenuator. They refer to it as a "DACT type." There was some comment on it some time in the past year, perhaps you saw it. I don't remember what the conclusion was.
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post #2257 of 3981
2/7/09 at 12:14am
From what I could hear on Pabbi's amp. The discreet resistors in the attenuator he had, blew the doors off of the Alps pots. Warmer slightly and much more detailed.
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post #2258 of 3981
2/7/09 at 8:05am
Quote:
Originally Posted by V-DiV View Post
Hey Dantes, If you try that attenuator let us know your impression of how it sounds compared to the blue ALPS. I presume you know, but just in case you don't, that is not an actual DACT attenuator. They refer to it as a "DACT type." There was some comment on it some time in the past year, perhaps you saw it. I don't remember what the conclusion was.
Yes i know.
The original DACT is a lot more expensive.
I read some review and this atenuator is a lot better than an alps and cheap.
I will tell my fealings about it when i receive it
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post #2259 of 3981
2/7/09 at 12:58pm
In my reading again of this thread (take a LOOOOOT of time ), i read that 6N1P could replace the 6DJ8/ecc88 tubes.

All ecc88/6DJ8 i bought are noisy or not good and i can't afford 100$ on a good NOS pair. My wife will kill me... and my banker too... :P

I saw there is many versions of the 6N1P: vi, ev and EB.
Which one is the best option ?
I found a lot of all on ebay at all prices. Incredible.
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post #2260 of 3981
2/7/09 at 6:01pm
There are indeed several variants of Russians 6N1P-xx for sale on eBay.
I have used tubes labeled: 6Н1П-ВИ and 6Н1П-ЕВ (6N1P-VI and 6N1P-EV respectively) with good results.

I have also tried tubes labeled 6Н1П (without 2 additional letters, '90 made), but it was a real disappointment.
This tube variant has single getter supporter (instead of double getter supporters of the 6N1P-VI and 6N1P-EV).

Don’t forget to modify R2 on the amp board accordingly when you roll 6N1P-xx tubes in.
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post #2261 of 3981
2/7/09 at 6:16pm
Quote:
Originally Posted by balderon View Post
I have about 6 LED's to illuminate. I did not want to add an additional supply so I was thinking of siphoning about 10ma (~2W) from the B+ supply.
I'm going to keep an eye on the responses for this. My only concern would be if any noise would return back into the powe supply circuit. I don't know if that would be filtered by any resistors for the LEDs.



Quote:
Originally Posted by jamess71 View Post
Well after about 2 months of working on my Bijou, part time of course, a 2 yr. old and a 2 month old. ;-)

So close I can taste it.
Wow. I hear you on the part-time thing. No kids here, but I moved at the end of last year and still have lots to do. I think lately this qualifies as no-time.... I'm sure the Bijou folks think I'm just a poser...always posting...never building..haha....

So you're close. Good. Don't rush! That is the part of the build where I start to mess things up just to get it running. Don't do it!!! Good luck!
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post #2262 of 3981
2/7/09 at 6:23pm
Quote:
Originally Posted by bhjazz View Post
... I'm sure the Bijou folks think I'm just a poser...always posting...never building...
You have just read my mind!
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post #2263 of 3981
2/7/09 at 7:29pm
Quote:
Originally Posted by Ferrari View Post
Don’t forget to modify R2 on the amp board accordingly when you roll 6N1P-xx tubes in.
ho yes... didn't think at that...

I'have done the regal mod.
So, R2 value have to change anyway ?
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post #2264 of 3981
2/8/09 at 1:22am
Dantes, these values for some tubes are on the Bijou website under the Regal mod.
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post #2265 of 3981
2/8/09 at 6:33am
ho my... i had miss them...
sorry and thanks
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