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Old 15th April 2010, 05:43 PM   #91
cjkpkg is offline cjkpkg  United States
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Quote:
Originally Posted by gervenja View Post
Nice chassis, got one problem, my caps are 45 mm alone.
I ordered the Slimline 02/230 silver front 10mm cover 3mm alu.

John
The Janzen caps I am using are 27mm in a 40mm chassis...
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Old 15th April 2010, 08:44 PM   #92
Marra is offline Marra  United Kingdom
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gervenja; what power supply are you using
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Old 15th April 2010, 11:49 PM   #93
kzim229 is offline kzim229  United States
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Quote:
Originally Posted by gervenja View Post
Nice chassis, got one problem, my caps are 45 mm alone. I ordered the Slimline 02/230 silver front 10mm cover 3mm alu. John
Nice!
Please post pics when you finish your enclosure.
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Old 16th April 2010, 05:40 AM   #94
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Quote:
Originally Posted by Marra View Post
gervenja; what power supply are you using
I am using one from Peter Daniel, who has a GB for th F5 and it psu.
it's actually half a F5 psu, only the positive part. The parts are oversized and maybe to big for the B1 but I had them laying around. Will post some pic's later today and offcourse later on when I have the enclosure.
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Old 16th April 2010, 10:26 AM   #95
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As promised some pic's of the psu.
The blue multi turn pot is a temp, I now know that I have to use a 1,58 K resistor to get a perfect 18 Volts. And again it is somewhat overkill.
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File Type: jpg B1 PSU Test.jpg (78.9 KB, 939 views)
File Type: jpg B1 PSU Test2.jpg (84.4 KB, 932 views)
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Old 16th April 2010, 11:00 AM   #96
AndrewT is online now AndrewT  Scotland
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Quote:
Originally Posted by gervenja View Post
I now know that I have to use a 1,58 K resistor to get a perfect 18 Volts.
if you really need that accuracy then 1k8//13k comes to 1k58

R// = 1.8 * 1.58 / (1.8 - 1.58) =12k93, call it 13k
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Old 16th April 2010, 04:18 PM   #97
wboyd is offline wboyd  United States
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Just finished my B1 the other night….wow…what an amazing little piece of work! The music seems more lively and detailed (as opposed to my passive pre or even my GG clone); also the background seems a little “deeper” or more “black”. Really, whatever the case may be, I like this unit a lot.

I have to give a lot of thanks to Mr. Pass for giving this design to the DIY community – it hits both the price and performance markers in my book…I think that I paid less than 100 bucks for the board, Jfets and other auxiliary stuff I needed to complete this thing (I had resistors and most caps on hand). Also a big thanks goes out to the DIY community in general…lots of help and inspiration on this and many other projects.

I have a few pictures posted on my Google photos site…

Picasa Web Albums - Wayne - Pass Labs B1

Now, as soon as I get a little more free time I will build a proper chassis and make a few mods to the power supply and maybe add a couple of additional inputs and use this as my preamp on a full time basis.


Wayne
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Old 28th April 2010, 01:09 AM   #98
t3447ml is offline t3447ml  United States
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Default My B1 Buffer Preamp

Circuit running at 18v supply.
B1 board is from Sjostrom Audio, thanks Per-Anders.
Voltage Regulator board is from Delta Audio, thanks Rasmussen.

B1 Buffer Preamp is being used with the following:
Playstation One CD Player with output measured at 0.305 VAC rms.
Elliot Sound Products P101 Amplifier 40V rails with gain measured at 26db.
Proarc 2.5 clone speakers.

System is used in my living room, normal easy listening level is with volume knob at 1/4. Knob at 1/2 is loud.

I'm very pleased with buffer thank you Nelson.
Attached Images
File Type: jpg DSCN0357a.jpg (189.6 KB, 840 views)
File Type: jpg DSCN0358a.jpg (188.3 KB, 802 views)
File Type: jpg DSCN0359a.jpg (176.4 KB, 783 views)
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Old 28th April 2010, 01:13 AM   #99
t3447ml is offline t3447ml  United States
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Default My B1 Buffer

B1 Case
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File Type: jpg DSCN0344a.jpg (107.5 KB, 464 views)
File Type: jpg DSCN0345a.jpg (111.6 KB, 317 views)
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Old 28th April 2010, 01:28 AM   #100
jleaman is offline jleaman  Belgium
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Quote:
Originally Posted by t3447ml View Post
Circuit running at 18v supply.
B1 board is from Sjostrom Audio, thanks Per-Anders.
Voltage Regulator board is from Delta Audio, thanks Rasmussen.

B1 Buffer Preamp is being used with the following:
Playstation One CD Player with output measured at 0.305 VAC rms.
Elliot Sound Products P101 Amplifier 40V rails with gain measured at 26db.
Proarc 2.5 clone speakers.

System is used in my living room, normal easy listening level is with volume knob at 1/4. Knob at 1/2 is loud.

I'm very pleased with buffer thank you Nelson.
Where did you buy the Regulator board ? Looks nice, nice clean simple layout

Might hear a difference if you change that pot to a nicer one ?
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