Korg Nutube B1 Pre-Order Q&A

[Analogico]

Follow the link below and you'll find what you're looking for.

http://www.firstwatt.com/pdf/art_diy_nutube_preamp.pdf

 

[Jason]

hello,
I would be tempted to order two boards for a balanced preamp.
is the option to have 8 matched fets and how would it be possible to add this option/note to the order?
thanks,
Matt.

Not currently as we use a 3PL (3rd party logistics facility) and aren't currently planning on producing a balanced kit so an 8-fet product won't exist, and there won't be a balanced PCB or chassis. There would be quite a bit of interest in a balanced option but I don't think it will be from the store at this stage. Never say never of course. I'd suggest checking in the B1K technical discussion thread what the requirements would be for this purpose, and go DIY it from there.

 

[Hercules]

Hello all, I placed order of nutube, PCB and Jfet to integrated with my old pre amp, where can I get the parts list for other parts like capacitors and resistor values?

I found this picture and write down the value Already, thanks

 

[Hercules]

Follow the link below and you'll find what you're looking for.

http://www.firstwatt.com/pdf/art_diy_nutube_preamp.pdf

Thank you so much!

 

[geoturbo]

Not currently as we use a 3PL (3rd party logistics facility) and aren't currently planning on producing a balanced kit so an 8-fet product won't exist, and there won't be a balanced PCB or chassis. There would be quite a bit of interest in a balanced option but I don't think it will be from the store at this stage. Never say never of course. I'd suggest checking in the B1K technical discussion thread what the requirements would be for this purpose, and go DIY it from there.

thank you, Jason.
I just proceeded ordering two boards for a balanced config, let's see, thanks,

Matt.

 

[rusomon]

I have a few questions about the Korg B1 kit.


1. Is there or will there be a build guide?
2. How about a wiring diagram?

3. What, if any, is the gain on this preamp?
4. Does this preamp pass an out-of-phase signal?
5. If so, how and where does this get straightened out?


I'm very interested in ordering this preamp kit, but I could definitely use a little more information/ guidance before I do. Thanks in advance for whatever help you might be willing to offer a relative newbie to this kind of thing.

 

[Analogico]

I have a few questions about the Korg B1 kit.


1. Is there or will there be a build guide?
2. How about a wiring diagram?

3. What, if any, is the gain on this preamp?
4. Does this preamp pass an out-of-phase signal?
5. If so, how and where does this get straightened out?


I'm very interested in ordering this preamp kit, but I could definitely use a little more information/ guidance before I do. Thanks in advance for whatever help you might be willing to offer a relative newbie to this kind of thing.

1 and 2. Yes, 6L6 is working on it. You can take a peek to some of the images that will be used.
3. 16 db
4 and 5. B1K paper by Nelson Pass

 

[rusomon]

Thank you, Analogico
1. and 2. This is great to hear.
3. 16db is perfect for what I need.
4. and 5. Is it just a matter of connecting your speakers so they're out of phase?

 

[Analogico]

4. and 5. Yes, that ought to "solve" it. Although, you can try both and choose what your ears like the most.

 

[rusomon]

Got it, excellent. I've ordered the kit.


Thanks so much for your help, Analogico.

 

[icefireman]

In the option PCB+JFETs $25, besides of the PCB and JFETs, which items (resistors, diode, capacitors and TRIM POT 10K) will come with? Thanks.

 

[Analogico]

Only the four R1 resistores, matched (by Nelson Pass himself) to the JFETs.

 

[ARCANE]

Yes absolutely there will be a great build guide by 6L6 and he's been hard at work at it for months. It's under construction, almost finished in fact and is looking great. If you like you can have a sneak peak at a dump of the images the build guide will use (under construction).

What a great guide. Fantastic work.

Yves

 

[Jason]

All stock has now been received by the warehouse and any remaining orders that have not yet shipped will ship over the next 1-2 days.

The B1K build guide is now up. Thanks 6L6!

B1 with Korg Nutube - diyAudio Guides

Thanks everyone who participated in the pre-order!

Closing this thread now - please post any discussion in the main B1K thread.