Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

B1 with Korg Triode
B1 with Korg Triode
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th October 2017, 08:17 PM   #21
invaderzim is offline invaderzim  United States
diyAudio Member
 
invaderzim's Avatar
 
Join Date: Oct 2015
I'm listening to headphones through an amp with the Korg tube in it now and this design is really tempting.

These tubes are pretty microphonic so some sort of cushioning for the mount might be helpful. When the delay relay kicks on the sound on the amp I have I get a high pitch 'ching' sound through the headphones if I don't have audio on it yet. Turning the power switch off gets an even louder sound.

I'm not sure what the side effects of connecting the tube with wires rather than just the pins would have but that would not only help but also allow placement of the tube so it could be seen glowing.
  Reply With Quote
Old 17th October 2017, 08:29 PM   #22
Soundhappy is offline Soundhappy  France
diyAudio Member
 
Soundhappy's Avatar
 
Join Date: Oct 2012
Location: Montpellier near Mediterranean Sea France
Non worry about microphonic
Attached Images
File Type: jpg A74F19AF-B406-45F2-BF53-220083C9941F.JPG (253.0 KB, 1359 views)
File Type: jpg FA788B94-CF8B-44A5-B0A2-3C96FA6BA14E.JPG (210.0 KB, 1342 views)
__________________
class A amplifiers with full range speakers
sings like angels in heaven
  Reply With Quote
Old 17th October 2017, 08:39 PM   #23
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
B1 with Korg Triode
ook

ZM don't like sissy triodes



though , I wish Papa to sell zillion of them , 3879$ each

me likee this size

Click the image to open in full size.
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 17th October 2017, 09:34 PM   #24
Soundhappy is offline Soundhappy  France
diyAudio Member
 
Soundhappy's Avatar
 
Join Date: Oct 2012
Location: Montpellier near Mediterranean Sea France
Quote:
Originally Posted by Nelson Pass View Post
Since that post I received a nice note from Mr. Tohyama of Korg,
and he sent me a picture of the preamp on display at RMAF.
Thanks a bunch Mr Pass !
What about RMAF acronym is ?
Was the presentation of Designers work who use Nutube i guess.
Please 2SK370 or 2SK170 what is Idss range for B1 Triode.
__________________
class A amplifiers with full range speakers
sings like angels in heaven
  Reply With Quote
Old 17th October 2017, 11:17 PM   #25
Nelson Pass is offline Nelson Pass  United States
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
B1 with Korg Triode
Rocky Mountain Audio Fest.

I bought a couple of Pete Millet's on ebay to round out my stock,
and they arrived quickly enough.

The data sheet talks about microphonics, but I tapped away on mine
and didn't see it in the residual thd/noise. Could be overly cautious Japanese,
but they do recommend an absorptive pad.

The other possibility, look at the impedances involved - load resistor is almost
400K, and can probably pick up the electrical noise from any switching.
  Reply With Quote
Old 18th October 2017, 01:21 AM   #26
invaderzim is offline invaderzim  United States
diyAudio Member
 
invaderzim's Avatar
 
Join Date: Oct 2015
On the buffer that I built with Millet's PCB I have to really tap the tube hard and have the volume full with audio paused to hear any hint of sound.

With the headphone amp also using his PCB if I have the audio paused, volume at 1/4 and just brush my finger against where the headphone is plugged in I get a faint ringing sound like tapping on a crystal glass. Contact with any component on the PCB generates a similar sound. If I tap directly on the tube with the volume on I can hear the 'cling' in the background of the music.
  Reply With Quote
Old 18th October 2017, 03:42 AM   #27
ChuckT is offline ChuckT
diyAudio Member
 
Join Date: Nov 2002
Location: HK
My 6p1 microphonic as I also have Millet's headphone board and I can heard a zinging sound whenever I turn the volume or just touch the chassis. Transferring the board to a wooden box reduce the zinging sound by quite a bit, probably the previous metal case resonates easier.
When mounting the 6p1 best to try to isolated it as much as possible, IMO.
  Reply With Quote
Old 18th October 2017, 03:48 AM   #28
ChuckT is offline ChuckT
diyAudio Member
 
Join Date: Nov 2002
Location: HK
BTW, is the input stage before the 6p1 really necessary?
As I have seem a Japanese schematic with dual 6p1 pre channel running at full 80V plate (with 620k plate resistor and pin 9 has 43k parallel with 330uF to ground) and both the grid is directly connected to a 100k pot.
  Reply With Quote
Old 18th October 2017, 04:14 AM   #29
Soundhappy is offline Soundhappy  France
diyAudio Member
 
Soundhappy's Avatar
 
Join Date: Oct 2012
Location: Montpellier near Mediterranean Sea France
Some people made plexiglass boxes (laser cut or 3D printing ?)
but frankly, who knock the glass or shake his preamp in everyday listening.
My 2A3 DHT mono blocks amplifiers or triode preamp are quiet ones.
With SMPS outside the box result is very little mechanical vibrations and risks to get microphonic phenomena.
__________________
class A amplifiers with full range speakers
sings like angels in heaven
  Reply With Quote
Old 18th October 2017, 04:15 AM   #30
kpsthakur is offline kpsthakur  India
diyAudio Member
 
Join Date: Sep 2016
Location: Delhi
✌️✌️
  Reply With Quote

Reply


B1 with Korg TriodeHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Korg NuTube is now available online pmillett Vendor's Bazaar 133 4th June 2018 08:43 PM
New tube tech from Korg Newk_Yuler Tubes / Valves 38 15th January 2017 01:55 AM
2 X PIONEER CDJ-1000 MK3 PLAYER, Korg M3 88-Key Workstation / Sampler,Yamaha Korg holocoast Vendor's Bazaar 0 22nd August 2009 07:03 AM
tapping into keyboard of Korg Polysix mashaffer Instruments and Amps 0 5th October 2008 01:06 AM
Just ordered a Korg EMX-1 MikeHunt79 Tubes / Valves 5 19th May 2008 08:34 PM


New To Site? Need Help?

All times are GMT. The time now is 09:11 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki