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Korg B1 completion kit pioneer batch feedback
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Old 13th November 2019, 12:53 AM   #91
CaptainSniffy is offline CaptainSniffy  United States
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Originally Posted by skunark View Post
I know we canít say this enough but you all rock for doing this!
Seconded! Thanks Jason and Jim! Your efforts are very much appreciated!
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Old Yesterday, 09:09 AM   #92
rhing is offline rhing  United States
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BAF 2019 was a great time. Had an opportunity to attend the test and measurement workshop, listen to some great talks and listen to many outstanding projects. I have attended many BAFís and this one was one of the best Iíve been too. It was quite a global crowd and there were plenty of speakers to pair with amps.

For the B1 with Korg NuTube chassis, I would recommend a chassis with no ventilation slots to seal up the chassis. When I cover the slots on the chassis, I have no problems with microphony. Additionally, I used the vibration-damping standoffs used by drone builders. Both of these measures completely cured the microphony issues and preamp sounds awesome and looks great.
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Old Yesterday, 04:08 PM   #93
pboser is offline pboser  United States
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Korg B1 completion kit pioneer batch feedback
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Originally Posted by rhing View Post
Additionally, I used the vibration-damping standoffs used by drone builders.
My microphony is not too bad, but I'd like to see what can be done to reduce it. Where can I get those standoffs? Could you please post a source of what you used? Something like this? Spektrum Nylon Standoffs/Hdwe Set for Drone Racing | TowerHobbies.com

Thanks in advance.
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Old Yesterday, 04:17 PM   #94
6L6 is offline 6L6  United States
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Korg B1 completion kit pioneer batch feedback
I’m experimenting with microphony reduction, I have one that’s pretty bad. I’m going try soft mounts, softer mounts, silicone washers, sorbathane, and other things.

Resting the chassis on Vibrapods or similar very compliant feet is quite helpful.

Will report on my findings when I get them.

in the meantime, please post to the thread with your solutions!! The NuTubes themselves seem to be pretty variable in microphony, some people have issues, some dont, so I think it’s going to be an ongoing thing to find what works. The circuit is absolutely wonderfully sounding so it’s worth the effort.
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Old Yesterday, 04:47 PM   #95
rhing is offline rhing  United States
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Here’s a link to the iFlight vibration damping standoffs and Nylon nuts:

https://www.amazon.com/dp/B073NYV6RH...p_mob_ap_share
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Old Yesterday, 05:23 PM   #96
pboser is offline pboser  United States
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Korg B1 completion kit pioneer batch feedback
Thanks!
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Old Yesterday, 06:57 PM   #97
Mark Johnson is offline Mark Johnson  United States
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Korg B1 completion kit pioneer batch feedback
Another big thank-you to @rhing ! Much gratitude.
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Old Yesterday, 08:24 PM   #98
Leicaphile27 is offline Leicaphile27  Canada
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Hot gluing the Nu Tube to the PCB works great, except for when you turn it on. The preamp whistles, but dies down soon after. Annoying, but just for a few seconds.
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Old Yesterday, 11:47 PM   #99
astromo is online now astromo  Australia
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Quote:
Originally Posted by 6L6 View Post
I’m going try soft mounts, softer mounts, silicone washers, sorbathane, and other things.

Resting the chassis on Vibrapods or similar very compliant feet is quite helpful.

What?
Something like iFlight M3 Rubber Damper Balls? Cross-linked from rhing's suggestion.

Last edited by astromo; Today at 12:01 AM.
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