Nelson Pass B-1 preamp kit

Nick77 · « **Reply #440 on:** 10 Aug 2010, 12:21 pm »

Quote from: roymail on 10 Aug 2010, 12:16 pm

Sorry, what does R330 refer to?

Sorry typo, 330r.

exojam · « **Reply #441 on:** 10 Aug 2010, 12:22 pm »

I believe me means that he changed to a 330 ohm value instead of a 1K ohm, but I am sure Nick will clarifiy this.

James

roymail · « **Reply #442 on:** 10 Aug 2010, 12:24 pm »

Keith, what is the benefit of making this change?

Nick77 · « **Reply #443 on:** 10 Aug 2010, 12:25 pm »

Quote from: exojam on 10 Aug 2010, 12:22 pm

I believe me means that he changed to a 330 ohm value instead of a 1K ohm, but I am sure Nick will clarifiy this.

James

Correct, the boys over at diyaudio concluded you get a little better clairty and bass with lower value resistor.

Wushilui recommended them to me, i never tried 1k.

exojam · « **Reply #444 on:** 10 Aug 2010, 12:33 pm »

Nick,

Thank you again. Looks like i have another purchase to make

James

vantagesc · « **Reply #445 on:** 10 Aug 2010, 05:18 pm »

I just ordered all the parts that wushuliu posted on the first page. So the 4 1K resistors are Dale/Vishay type. 1% tolerance, 50 ppm. Are these decent parts?

Nick77 · « **Reply #446 on:** 10 Aug 2010, 06:02 pm »

Welcome to the forum, im sure they will be fine, just depends on what your looking for.

http://www.altavistaaudio.com/resistors.html

vantagesc · « **Reply #447 on:** 10 Aug 2010, 07:09 pm »

Thanks. I will try it out with the parts I have and then get to tinkering down the road.

roymail · « **Reply #448 on:** 10 Aug 2010, 09:22 pm »

Quote from: vantagesc on 10 Aug 2010, 05:18 pm

I just ordered all the parts that wushuliu posted on the first page. So the 4 1K resistors are Dale/Vishay type. 1% tolerance, 50 ppm. Are these decent parts?

I wouldn't be too concerned. I'm pretty sure that Nelson Pass used the Vishay RN55D type 1K resistors in his stock design. And, plenty of guys used the BOM list that Wushuliu suggested and are very happy with the result.

turkey · « **Reply #449 on:** 11 Aug 2010, 05:43 pm »

Quote from: roymail on 10 Aug 2010, 09:22 pm

I wouldn't be too concerned. I'm pretty sure that Nelson Pass used the Vishay RN55D type 1K resistors in his stock design. And, plenty of guys used the BOM list that Wushuliu suggested and are very happy with the result.

I've had almost a dozen components that used these resistors. Originally they were Corning, then Dale. They're very high quality.

I've also used them in some things I built and I was very satisfied.

wushuliu · « **Reply #450 on:** 11 Aug 2010, 06:51 pm »

HT COZ POSTED THIS IN GR RESEARCH. IF YOU WANT TO RUN YOUR B1 W/ BATTERIES THIS IS AN AWESOME DEAL!!!! EVEN IF YOU ALREADY HAVE A WALLWART THIS IS WORTH IT!!!

Just noticed this today www.woot.com Maybe this would be an option for battery power?

Energizer Universal 8000mAh Rechargeable Battery Pack
$39.99
Specifications:

Power Capacity: 8000 mAh @ 5V
Battery Cell: Lithium Polymer
Rated Input: DC 19V
Rated Output: DC 5V~1000mA; DC 12V~2000mA; DC 19V~2000mA
Store and operate between: 32 degrees F – 113 degrees F
Dimensions: 4.3" x 2.9" x .9" (LxWxH)
Weight: 7.9oz

rtate · « **Reply #451 on:** 11 Aug 2010, 07:22 pm »

Too bad they won't ship to Canada....

vantagesc · « **Reply #452 on:** 12 Aug 2010, 04:22 am »

BTW, what gauge hookup wire do you guys recommend? Parts express has 18awg and 24awg.

exojam · « **Reply #453 on:** 13 Aug 2010, 12:24 pm »

Does anyone know where I can find a substitute for this power jack? I all ready have the wall wart below. I checked mouser but could not find one. Thanks.

Power jack:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CP-037A-ND

Wall wart:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=T987-P5P-ND

James

exojam · « **Reply #454 on:** 13 Aug 2010, 12:25 pm »

Quote from: vantagesc on 12 Aug 2010, 04:22 am

BTW, what gauge hookup wire do you guys recommend? Parts express has 18awg and 24awg.

I used 24awg from Radio Shack..

James

Nick77 · « **Reply #455 on:** 13 Aug 2010, 01:37 pm »

Quote from: vantagesc on 12 Aug 2010, 04:22 am

BTW, what gauge hookup wire do you guys recommend? Parts express has 18awg and 24awg.

I dont think 18ga will fit.

roymail · « **Reply #456 on:** 13 Aug 2010, 02:18 pm »

Quote from: exojam on 13 Aug 2010, 12:24 pm

Does anyone know where I can find a substitute for this power jack? I all ready have the wall wart below. I checked mouser but could not find one. Thanks.
James

This one will fit flush and was recommended to me by another AC member.

http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=CP-011A-ND&x=19&y=21

exojam · « **Reply #457 on:** 13 Aug 2010, 02:29 pm »

Quote from: roymail on 13 Aug 2010, 02:18 pm

This one will fit flush and was recommended to me by another AC member.

http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=CP-011A-ND&x=19&y=21

Cool. Thank you very much.

James

vantagesc · « **Reply #458 on:** 13 Aug 2010, 03:29 pm »

Quote from: exojam on 13 Aug 2010, 12:24 pm

Does anyone know where I can find a substitute for this power jack? I all ready have the wall wart below. I checked mouser but could not find one. Thanks.

Power jack:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CP-037A-ND

Wall wart:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=T987-P5P-ND

James

I just ordered the high current version of the same jack:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CP-037AH-ND

I haven't tried it out yet though.

roymail · « **Reply #459 on:** 13 Aug 2010, 05:18 pm »

It's just easier to drill a hole and attach.