Nelson Pass B-1 preamp kit

xecluded · « **Reply #300 on:** 13 Jun 2010, 08:53 pm »

Quote from: walkern on 1 Jun 2010, 10:30 pm

Finished my B-1 today, and it is working like a champ. Went with all the "standard" parts including dual PEC volume controls (not sure if I'll like that, but I do appreciate having a balance control of sorts).
Neil

Neil,

Can i ask what is the part # for the dual pec volume controls and where do you get them at. I am looking to upgrade the pots on mine. Thanks

poseidonsvoice · « **Reply #301 on:** 13 Jun 2010, 09:05 pm »

Looks like this may be the one. You would need a pair of course.

Anand.

Nick77 · « **Reply #302 on:** 13 Jun 2010, 09:13 pm »

Anand i have seen this link used before also. I like your price point better, but whats the difference between the two??

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=KB2531S28-ND

roymail · « **Reply #303 on:** 13 Jun 2010, 10:51 pm »

I was wondering the same thing???

There can't be much difference in the two... you'd think.

wushuliu · « **Reply #304 on:** 13 Jun 2010, 11:48 pm »

Quote from: Nick77 on 13 Jun 2010, 09:13 pm

Anand i have seen this link used before also. I like your price point better, but whats the difference between the two??

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=KB2531S28-ND

Military v. Commercial.

Nick77 · « **Reply #305 on:** 13 Jun 2010, 11:50 pm »

Quote from: wushuliu on 13 Jun 2010, 11:48 pm

Military v. Commercial.

Any reason to spend the extra money??

wushuliu · « **Reply #306 on:** 14 Jun 2010, 05:50 am »

Quote from: Nick77 on 13 Jun 2010, 11:50 pm

Any reason to spend the extra money??

Nope!

daniloreyes · « **Reply #307 on:** 14 Jun 2010, 07:14 pm »

Which one would be better for the ClassdAudio amps, this B-1 or the lightspeed? anyone has tried adding the lightspeed to this preamp?

roymail · « **Reply #308 on:** 14 Jun 2010, 07:59 pm »

Quote from: daniloreyes on 14 Jun 2010, 07:14 pm

Which one would be better for the ClassdAudio amps, this B-1 or the lightspeed? anyone has tried adding the lightspeed to this preamp?

LSA integrated into the B1 would be great. Lightspeed alone would not work with the CDA series amps given their very low input impedance of 3K. However, the SDS series amps should be good using the Lightspeed given an input impedance of 47K. SDS-254 would be my preference.

I recommend you give the B1 a try first, then decide whether investing in the LSA is necessary.

roymail · « **Reply #309 on:** 15 Jun 2010, 04:17 am »

wushuliu, I've got a question... surprise!

Using the standard PS, is it necessary to use a power switch (on/off) with the B1?

Battery power is a different matter of course.

wushuliu · « **Reply #310 on:** 15 Jun 2010, 04:41 am »

Quote from: roymail on 15 Jun 2010, 04:17 am

wushuliu, I've got a question... surprise!

Using the standard PS, is it necessary to use a power switch (on/off) with the B1?

Battery power is a different matter of course.

I don't. It barely draws any power.

roymail · « **Reply #311 on:** 15 Jun 2010, 05:00 am »

Quote from: wushuliu on 15 Jun 2010, 04:41 am

I don't. It barely draws any power.

Yes, less than 0.02 amps is not much current. The reason I asked is I noticed that the Burson Audio Buffer has a power switch on the rear, and NP did not mention it in his paper on the B1. Thanks!

wushuliu · « **Reply #312 on:** 15 Jun 2010, 06:51 am »

If all goes well I may be selling my B1 soon.

Nick77 · « **Reply #313 on:** 15 Jun 2010, 11:58 am »

Quote from: wushuliu on 15 Jun 2010, 06:51 am

If all goes well I may be selling my B1 soon.

Would you possibly be building a hot rodded B1?

roymail · « **Reply #314 on:** 15 Jun 2010, 12:59 pm »

Quote from: wushuliu on 15 Jun 2010, 06:51 am

If all goes well I may be selling my B1 soon.

AC, wassup? You can tell us... we won't tell anyone!

xecluded · « **Reply #315 on:** 15 Jun 2010, 03:30 pm »

Quote from: poseidonsvoice on 13 Jun 2010, 09:05 pm

Looks like this may be the one. You would need a pair of course.

Anand.

Thanks Anand. I will put in my order.

wushuliu · « **Reply #316 on:** 15 Jun 2010, 03:39 pm »

Quote from: poseidonsvoice on 13 Jun 2010, 09:05 pm

Looks like this may be the one. You would need a pair of course.

Anand.

You forgot to mention that this is the actual size...

poseidonsvoice · « **Reply #317 on:** 15 Jun 2010, 05:12 pm »

Quote from: wushuliu on 15 Jun 2010, 03:39 pm

You forgot to mention that this is the actual size...

roymail · « **Reply #318 on:** 15 Jun 2010, 08:43 pm »

from wushuliu,
A good test for flavoring would be the 2 1uf input caps.

How about using the Digi-Key BC2076-ND that Nelson P recommended instead of the Jantzen 1.0uF 400V Crosscap listed in the BOM?

Looks like they would also fit better on the board. Any difference in the quality of sound?

wushuliu · « **Reply #319 on:** 15 Jun 2010, 08:55 pm »

Quote from: roymail on 15 Jun 2010, 08:43 pm

from wushuliu,
A good test for flavoring would be the 2 1uf input caps.

How about using the Digi-Key BC2076-ND that Nelson P recommended instead of the Jantzen 1.0uF 400V Crosscap listed in the BOM?

Looks like they would also fit better on the board. Any difference in the quality of sound?

As far as stock goes, Nelson's pick is fine. I really, really do recommend stepping up a notch with that cap and the resistors. The B1 is very responsive to the components. Though it's better to upgrade later I suppose if you're not convinced what difference it will make and want to hear it for yourself.