I can't tell much a difference between the Fairchild and the Toshiba in this application, the signature of the NuTube is unquestionably dominant.
It's really cool.
I'll have a photo of a populated store board soon. Complete build guide will wait until there's a pre-drilled chassis available. (Which is being worked on)
It's really cool.
I'll have a photo of a populated store board soon. Complete build guide will wait until there's a pre-drilled chassis available. (Which is being worked on)
Carsten,
Sorry I can not help you.I could not find other shops.
I searched Japanese information about Nutube's microphonic noise.
Some people are using cushions, but I can not find a definitive know-how.
But,I found one unique way.
Placing a powerful magnet on the back of Nutube reduces microphonic noise.
1722 ：真空管 KORG Nutube、 磁石でマイクロフォニック・ノイズを消す （第２編） | ＳhinさんのPA工作室
Can you understand with photographs?
When you place the magnets properly, the blue light of Nutube becomes narrow linearly and the sound improves.
The reason for this is presumed that vibration of the filament is suppressed by magnetic force.
(There are other explanations, but translation is difficult for me)
There is no explanation about side effects.
I also ordered the B1 board. I will try this magnet method later.
Sorry I can not help you.I could not find other shops.
I searched Japanese information about Nutube's microphonic noise.
Some people are using cushions, but I can not find a definitive know-how.
But,I found one unique way.
Placing a powerful magnet on the back of Nutube reduces microphonic noise.
1722 ：真空管 KORG Nutube、 磁石でマイクロフォニック・ノイズを消す （第２編） | ＳhinさんのPA工作室
Can you understand with photographs?
When you place the magnets properly, the blue light of Nutube becomes narrow linearly and the sound improves.
The reason for this is presumed that vibration of the filament is suppressed by magnetic force.
(There are other explanations, but translation is difficult for me)
There is no explanation about side effects.
I also ordered the B1 board. I will try this magnet method later.
Just want to share my new XMAS B1 Korg Triode project. I used a gutted Fender Rumble headamp chassis to hold all the goodies. The power supply consists of a 15vdc laptop brick —>DC-DC stepup converter—>capMx board—> B1 Korg. Volume adjustment is handled by one of the eBay “Dact Type” 50K stepped attenuators.
I’ve been tuned in to all the discussions about the Korg microphonic issues and how to remedy them. I have a bit of experience with the Korg from a couple of Pete Millett projects, and indeed it can be picky.
So, I tried using this:
SORBOTHANE SHEET 6X6x1/8" 150mmx150mmx2.4mm PAD SELF STICK SHEET AUDIOQUEST 3M | eBay
It has 3m adhesive on both sides. I cut a piece and installed it under the NuTube and soldered it into place. Then I cut a bigger piece the same size as the B1 board. I sandwiched the sorbothane sheet between the board and chassis floor. The mounting screws are snug enough to keep the board in place but not tight.
So far, this is the quietest implementation of the NuTube I’ve had experience with. I can hit the chassis, the furniture and even tap the tube itself without hearing the dreaded ringing
This was a very enjoyable project to build and sounds sweet.
Thank you Nelson Pass for your generous gift!
I’ve been tuned in to all the discussions about the Korg microphonic issues and how to remedy them. I have a bit of experience with the Korg from a couple of Pete Millett projects, and indeed it can be picky.
So, I tried using this:
SORBOTHANE SHEET 6X6x1/8" 150mmx150mmx2.4mm PAD SELF STICK SHEET AUDIOQUEST 3M | eBay
It has 3m adhesive on both sides. I cut a piece and installed it under the NuTube and soldered it into place. Then I cut a bigger piece the same size as the B1 board. I sandwiched the sorbothane sheet between the board and chassis floor. The mounting screws are snug enough to keep the board in place but not tight.
So far, this is the quietest implementation of the NuTube I’ve had experience with. I can hit the chassis, the furniture and even tap the tube itself without hearing the dreaded ringing
This was a very enjoyable project to build and sounds sweet.
Thank you Nelson Pass for your generous gift!
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Don’t do that. If you must, try to find some socket with zero insertion force and a lever to clamp it. A la cpu sockets and test jigs etc. I hope you know what I am thinking about.
Something along these lines.
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Just received the Korg 01 accessory kit from RS here in the UK. It includes a PCB + various pads (cushions) and harness/s with a special PCB socket for the nutube to plug directly into without soldering the nutube to the main board.
Comes with instruction on various mounting 'configurations'. Sorry cant upload the photos yet but will do in due course.
Does the socket require the use of the cable harness, or does the Nutube plug right in to the socket?
VERY interesting!!! Thanks for sharing! Please post your impressions once you try it.
That is an amazing find. It looks like the harmonic distortion at 10kHz goes from 0.1% to 0.015% (!!!) using either the magnet configuration in photos 1 and 2, while also significantly improving microphonics.
Its an 'ether or' option, you can solder the wire ends of the white harness to the korge board and use the supplied daughter board for the Nutube or use the supplied socket (black) and daughter board via the supplied cushions. Ive yet to implement either...but the instruction advise the use of the plastic case/holder for max efficiency and superior audio quality. 40db quieter !! with it used from applied impacts from outside?? and you end up with (an and I quote):- 'impulsive sound' ??
Good quality throughout...
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