B1 builders thread - Page 11

t3447ml · 28th April 2010, 01:41 AM

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.

jleaman · 28th April 2010, 02:41 AM

Quote:

Originally Posted by t3447ml

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!

cjkpkg · 28th April 2010, 05:13 PM

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.

AndrewT · 29th April 2010, 09:06 AM

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.

cjkpkg · 29th April 2010, 12:59 PM

Indeed...hooked the B1 up to my chipamp.com LM3886 and it sounded fantastic...

cjkpkg · 1st May 2010, 08:37 PM

More progress...I mounted the PCB and JBwelded the power inlet to the floor of the chassis...

Marra · 3rd May 2010, 07:08 PM

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.JPG mum 182.JPG

Marra · 3rd May 2010, 07:28 PM

The inside.

Marra · 3rd May 2010, 07:38 PM

Sorry about the quality of the pictures

fishski13 · 8th May 2010, 06:04 AM

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.

29th April 2010, 09:06 AM	#104
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	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. __________________ regards Andrew T.

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28th April 2010, 01:41 AM	#101
t3447ml diyAudio Member Join Date: Oct 2005	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.

28th April 2010, 05:13 PM	#103
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	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.

29th April 2010, 12:59 PM	#105
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	Indeed...hooked the B1 up to my chipamp.com LM3886 and it sounded fantastic...

1st May 2010, 08:37 PM	#106
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	More progress...I mounted the PCB and JBwelded the power inlet to the floor of the chassis...

3rd May 2010, 07:08 PM	#107
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	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.JPG mum 182.JPG

3rd May 2010, 07:28 PM	#108
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	The inside.

3rd May 2010, 07:38 PM	#109
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	Sorry about the quality of the pictures

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