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B1 with Korg Triode
B1 with Korg Triode
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Old 5th May 2019, 08:38 PM   #2261
cubicincher is offline cubicincher  Germany
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Join Date: Mar 2016
Location: Hechingen, South of Germany
I have used the NICHICON greensleeves / 10 µF / 50V in my B1 NUTUBE.
Sounds very good.
In my M2X I have changed the coupling cap from the NICHICON greensleeve to
a MUNDORF cap (C2 between EDCOR and follower stage). The differences
are marginal but audible. The discrepancy in the price is not marginal!
There is more difference changing the inputboards in the M2X. But they all sound good - each inputboard with its own 'character'.



Greets
Dirk
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Old 5th May 2019, 09:01 PM   #2262
cubicincher is offline cubicincher  Germany
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Some pics of the NICHICONs in the B1 NUTUBE.
And in the M2X (the coupling cap is screwed in a screw terminal block -
easy to exchange - no soldering).


Greets
Dirk
Attached Images
File Type: jpg B1 Nutube NICHICON ES caps.jpg (118.0 KB, 614 views)
File Type: jpg NUTUBE BACK TOP finished.jpg (109.9 KB, 623 views)
File Type: jpg M2X mainboards.jpg (95.8 KB, 619 views)
File Type: jpg M2X MUNDORF cap.jpg (101.5 KB, 613 views)
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Old 5th May 2019, 09:58 PM   #2263
laverda is offline laverda  United Kingdom
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Quote:
Originally Posted by Marra View Post
Wow this thing really is microphonic; my clunky Valab stepped attenuator causes whistles through the right speaker. I need to find a better means of damping the Nutube. Sounds good though
The xmas gift board from Mr P rings like a bast**d. I'm not blaming the board rather the Nutube itself or the way its mounted??.
The DIYstore board and the second Nutube is very quiet. Both were built with identical components and both tubes purchased from RS here in the UK but at different times some weeks apart.

The xmas tube it fixed (soldered) directly to the board where as the DIYstore board tube is on flying leads and on a foam suspension arrangement.

I'll be having a look at the xmas tube and detaching it from the board and mounting remotely with flying lead and a suspension kit. Not sure how much heat the tube will take for a de-soldering exercise. ??
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Old 5th May 2019, 10:25 PM   #2264
Roo2 is offline Roo2  Australia
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Hello all. Received my Nutube from the diyaudio store and the “metalwork” around the triode on one channel is a bit crooked. I haven’t put anything together yet so don’t know if is an issue... Does anyone else have one that looks like this on the inside?
Attached Images
File Type: jpeg 4803F4C1-E44A-4424-9B82-44DF14A13B43.jpeg (968.1 KB, 549 views)
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Old 5th May 2019, 10:31 PM   #2265
cubicincher is offline cubicincher  Germany
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Default to LAVERDA

Some rubbergrommets, self-adhesive-foam, silicone, bitumen helps a lot!


The NUTUBE wants to rest on a sofa / bed......


Seems to be a damping behaviour oriented device


Greets
Dirk
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Old 5th May 2019, 10:39 PM   #2266
cjfrbw is offline cjfrbw  United States
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Join Date: Mar 2007
Location: SF East Bay
Quote:
Originally Posted by Roo2 View Post
Hello all. Received my Nutube from the diyaudio store and the “metalwork” around the triode on one channel is a bit crooked. I haven’t put anything together yet so don’t know if is an issue... Does anyone else have one that looks like this on the inside?
Those look like the grids. Don't know if slight asymmetry would effect performance one way or another but I would suspect not. Regular vacuum tubes have lots of small irregularities even in matched tubes.
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Old 6th May 2019, 01:24 AM   #2267
avtech23 is offline avtech23  Australia
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B1 with Korg Triode
Quote:
Originally Posted by Roo2 View Post
Hello all. Received my Nutube from the diyaudio store and the “metalwork” around the triode on one channel is a bit crooked. I haven’t put anything together yet so don’t know if is an issue... Does anyone else have one that looks like this on the inside?
Mine is ever so slightly crooked on one side. Manufacturing variation I guess, hopefully it won't affect performance.

Does yours have the circle thing on the back like mine?
Attached Images
File Type: jpg Screenshot_20190506-095121_Gallery.jpg (303.6 KB, 249 views)
File Type: jpg Screenshot_20190506-095250_Gallery.jpg (165.0 KB, 223 views)
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Old 6th May 2019, 01:56 AM   #2268
Eric is offline Eric  United States
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B1 with Korg Triode
Does anyone have a link for adhesive bitumen sheets? Just installed my korg pcb into a chassis and it has a high-pitch ring when I adjust my stepped attenuator. It settles down after a few seconds, but I'd like to avoid it if I can.

Eric
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Old 6th May 2019, 05:11 AM   #2269
cubicincher is offline cubicincher  Germany
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Join Date: Mar 2016
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Default to Eric

Car audio freaks use selfadhesive Bitumen against vibration of the car body and
to silent everything what is vibrating in a car.
But I don't know a good adress in the states.


Greets
Dirk
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Old 6th May 2019, 07:00 AM   #2270
MEPER is offline MEPER  Denmark
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Yes, I got my from a Danish "car parts chain shop" where you can buy online:
Resonansplader 4 mm, 50x50 cm, 4 stk. - Lyddaempning - thansen.dk
4mm and with adhesive. Guess same kind of stuff exists in US.
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