B1 with Korg Triode

[ItsAllInMyHead]

You can test your PSU, which is advised, before installing the NuTube. What do you mean by "fire it up"?

 

[ClaudeG]

It is possible to measure voltages before the installation of the Nutube. Has been done (I did it), search function is your friend as obviously some voltage values are then different.

Enables you to make sure all is rght before installing the - quite valuable- Nutube.

Claude

 

[PKI]

I mean make it in sort of regular B1 and listen. All voltages are fine.

 

[dake13]

I'm building the B1 from the kit and I just stupidly broke the 50K pot. I have 100K and 20K Alps volume pots on hand. Worth waiting for another 50K pot from Parts Express, or use one of the others on hand? I'll be using the preamp with the ACA.

 

[dtaylo3]

That Nutube silicone dampening method sounds its best on music by the Goo Goo Dolls.

 

[aljordan]

Yeah, but best try some Goo Gone when you switch over to classical genre.

 

[Hikari1]

I'm building the B1 from the kit and I just stupidly broke the 50K pot. I have 100K and 20K Alps volume pots on hand. Worth waiting for another 50K pot from Parts Express, or use one of the others on hand? I'll be using the preamp with the ACA.

Either will work. I would use the 20K and not worry about it one bit. I am using 25K.

 

[konst]

What will be the effect of replacing the 10uf with say 100uf caps?

 

[Hikari1]

Lower cut off in bass frequency, probably inaudible since it's already so low.

And they will be physically larger. I am using 100uf Silmic because that's what I had.

 

[konst]

Thanks, I have some SEPC OS-CON I want to try....

 

[Hikari1]

I'd try them. But I haven't heard nice things about organic polymer for signal coupling. To me...100uf Silmics bypassed with a .1UF poly cap sounded best.

 

[ClaudeG]

Hi Konst,

There is no downside from an electrical POV going from 10uF to 100uF. But also electricaly no benefit at all as the 10uF caps are already well oversized.

Sonics are of course another matter, depending on the quality of the caps you intend to use and your taste. No danger trying...

Have fun

Claude

 

[Jason]

All B1K pre-orders have now shipped and things have settled down enough that I feel comfortable making the ~100 or so left over units available for sale. Available while stocks last:

Korg Nutube B1 – diyAudio Store

 

[Paddy Garcia]

~99 or so, time to upgrade the integrated amp I built for my dad with a standard B1

 

[konst]

ClaudeG, I am just playing with what I have lying round thanks

 

[lacrossebowe8]

Hi all, I recently finished my B1 Korg and had no real issues to start, but recently it has been making a rhythmic ticking or clicking sound from the speakers which does not depend on its volume level or input. Its not really audible when playing music except during very quiet passages but I would like to sort this out. Also, it makes a high frequency whine right after it turns on but then it goes away. I'm guessing that is the tube microphony. Any advice on the ticking? Thanks!

 

[rtate]

I read somewhere in this thread about resistors across the inputs to eliminate switching noise
I tried the search several different ways bur no luck
Could someone refresh my memory or point me in the right direction please ?

 

[Soundhappy]

@ Rtate

On B1 passive schematic they are 1M , 1/4 watt resistors

 

[PtboSteve]

I have to plug my ps into a different circuit in the room to make the ticking go away.

 

[rtate]

Thanks
I was sure I saw a picture some where in this thread...
They looked bigger than 1/4 watt though...