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Old 28th April 2010, 01:41 AM   #101
t3447ml is offline t3447ml  United States
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The regulator board from from a Bob Ellis group buy: Scalable PSU/regulator GB

You are correct about the pot, it is 10k and I'm looking for a good 25k replacement.
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Old 28th April 2010, 02:41 AM   #102
jleaman is offline jleaman  Belgium
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Quote:
Originally Posted by t3447ml View Post
The regulator board from from a Bob Ellis group buy: Scalable PSU/regulator GB

You are correct about the pot, it is 10k and I'm looking for a good 25k replacement.
alps black beauty, i got mine on ebay i bought 2 because i want to compare the B1 with it, and just a passive pot!
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Old 28th April 2010, 05:13 PM   #103
cjkpkg is offline cjkpkg  United States
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OK...got the distortion issue sorted out... ***Ahem*** miiiight have put a zener diode in the board instead of the 1n*** type....***Ahem***...

Got it all pretty well stuffed in the Hifi2000 galaxy chassis. Might have to trim some wires though. And I still need to mount the board to the bottom plate.

It is dead quiet and does sound nice. The only thing I wish is that I could get a little more gain out of the F5. With the B1 wide open it is just slightly less than my ideal - home alone - loud listening level. For 90% of the time it would be fine.
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Old 29th April 2010, 09:06 AM   #104
AndrewT is offline AndrewT  Scotland
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Yes, a B1 feeding an F5 gives a total voltage gain from source to speaker of 6times (+15.5dB).
This converts a CDP signal of 2.2Vac to a maximum of 13.2Vac at the speaker. Needs quite high efficiency speaker to play loud.
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Old 29th April 2010, 12:59 PM   #105
cjkpkg is offline cjkpkg  United States
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Indeed...hooked the B1 up to my chipamp.com LM3886 and it sounded fantastic...
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Old 1st May 2010, 08:37 PM   #106
cjkpkg is offline cjkpkg  United States
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More progress...I mounted the PCB and JBwelded the power inlet to the floor of the chassis...

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Old 3rd May 2010, 07:08 PM   #107
Marra is offline Marra  United Kingdom
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My humble but great sounding B1. The pcb is up on stilts and C2mounted underneath because I forgot about the caps diameter; with the lid on who'll know.Hope this works.
mum 182.JPGmum 182.JPG
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Old 3rd May 2010, 07:28 PM   #108
Marra is offline Marra  United Kingdom
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The inside.

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Old 3rd May 2010, 07:38 PM   #109
Marra is offline Marra  United Kingdom
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Sorry about the quality of the pictures
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Old 8th May 2010, 06:04 AM   #110
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lots of great builds.

here's my B1. DIY chassis with sanded aluminum and tung-oiled sapele. connectors are Switchcraft, wanky wire is Cardas, Clarity Caps, and a PEC pot. the 24V PS is an o-11 from AMB Labs AMB Laboratories DIY Audio Site in a Hammond black anodized chassis. the 10mm LEDs illuminate the interior and serve to indicate if the output is to speakers (blue), or muted and line-out to a headphone amp (slutty red) via the 3PDT switch on the front. i also installed a pair of RCAs for a subwoofer-out.

sounds fantastic "driving" my Amp4 and uFonkens^2. i just need to finish my F5 now .

a big thanks to Nelson to sharing his knowledge and time, and to everyone else that contributes here at diyaudio.com.

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