B1 with Korg Triode

[Hadox]

... or, i tried some searches for this kit and didn't found another supplier or contact email. Some hints?

Try this:

NUTUBE ACCESSORY KIT 01 | Accessory Kit of Korg NUTUBE inluding PC | RS Components

 

[GASCo]

I have a bunch of LSK170 D. Is the designation D OK?

 

[carsten.witt]

@Hadox,
thanks, but I don't know what behind this part number (German page doesn't show pics)... and there are some more things via google.

 

[Hadox]

@Hadox,
thanks, but I don't know what behind this part number (German page doesn't show pics)... and there are some more things via google.

It's this:

https://www.marutsu.co.jp/contents/shop/marutsu/img/goods/010/1349684/1349684_1.jpg


I bought it from RS UK.

 

[carsten.witt]

@Hadox,
thanks for the pic but this not what I want to buy.

 

[sov]

Thats more like it.
Changed T7/T8 to 9.5V and inverted speakers. I finally read the arcticle on Firstwatt

 

[Soundhappy]

I finally read the arcticle on Firstwatt

 

[R-K Rønningstad]

I would get a second B1 board and run it "Quad Mono".
Any LTP you devise is going to have extra gain you will need to burn.
Since the channels are unity gain, they are going to gain match even if the device gains are different. The only issue I see is that there will be no additional CMRR, and it will not convert Balanced to single ended..
If your amps are balanced, great. if not, its worth a larger discussion.

World it be a possibility to get the gain down by degenerating (with resistors)? Gain of the LTP I mean.

/rk

 

[R-K Rønningstad]

They do have cathodes.

Attached is a conceptual diagram of the Nutube as LTP.

Nice, you will need one NuTube per channel. It will to some degree drain the purse, but not much more so than purchasing 2SK246/389s and such. Some more space will be occupied by the NuTube of course, but, all in all, a splendid concept.

RK

 

[DougL]

World it be a possibility to get the gain down by degenerating (with resistors)? Gain of the LTP I mean.

/rk

Ok,
This is embarrassing.
I was thinking of the unity gain buffer.
I don't think you are going to get a lot more gain with a LTP than a grounded cathode, depending on your load resistors.

I can't think of an effective way to lower the gain.
However there are a lot of smart people here.
Maybe they will have a thought.

 

[kp93300]

Seeking clarification with regard to the 3W 10R, 270R resistors in the power supply input.

I notice that the current draw is about 65 ma in a previous post by Mr Pass.

1) Can i use 1 W resistors?
2) Are the value of the resistance critical ?
3) Can I use inductors to replace the resistors ?

thank you

 

[Nelson Pass]

The resistor runs at a little less than 1 watt, but I would advise
the higher rating for the 270. The 10 ohm will not be a problem
for .4 watt resistors spec'd elsewhere in the circuit.

 

[yoshida]

Hello from Japan.
Carsten-san,

akizukidenshi.com doesnt sell overseas.

Switch-science sells Nutube Accessory Kit on their Japanese page.
Nutubeアクセサリキット 01 - スイッチサイエンス

And they have pages for overseas.
There is no Nutube on overseas pages, but you can ask.
TOP - SWITCH-SCIENCE

Whether you can buy or not will depend on the country you live in. I think.

 

[carsten.witt]

@yoshida,

many many thanks! I contacted they via email and asked.

 

[cjfrbw]

Heh, Heh! When's the store gonna have the kits? After all, this is brain surgery, not entertainment!

 

[6L6]

Working on it. And about 4 other store projects as well.

They will be in the store when they get there.

 

[Jason]

Heh, Heh! When's the store gonna have the kits? After all, this is brain surgery, not entertainment!

What Jim said But in this case, they just arrived late last week, and will be available in the next 24-48 hours.

 

[Jason]

Now shipping

B1 Buffer with Korg Triode PCB + Fairchild JFETs – diyAudio Store

 

[cjfrbw]

Now shipping

B1 Buffer with Korg Triode PCB + Fairchild JFETs – diyAudio Store

Thank you. Ordered one, and should be good to start after ordering resistors.

Thanks to NP for the board and JFETs!

 

[Halauhula]

LTP version of Korg B1 for balanced operation

I believe we could make an LTP with the Korg tube(s) if that's what you want,
in fact I think it would be easy using a CCS on the Cathodes.

This would be awesome!