Go Back   Home > Forums > >

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

10 band EQ all tubes
10 band EQ all tubes
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
Old 11th May 2020, 10:23 AM   #11
Mark Tillotson is offline Mark Tillotson
diyAudio Member
 
Join Date: May 2018
Location: Cambridge UK
Impressive build - one channel is missing a valve I think? How are the bargraph LEDs driven?
  Reply With Quote
Old 11th May 2020, 11:28 AM   #12
kissabout2002 is offline kissabout2002  Italy
diyAudio Member
 
Join Date: Sep 2018
Location: Philippines
Quote:
Originally Posted by Mark Tillotson View Post
Impressive build - one channel is missing a valve I think? How are the bargraph LEDs driven?
Thank you for your comment, there is 10 channel but one valve for the channel 1kHz is fixed on the bottom of the chassis close to the guitar string, there was absolutely no more space...
The bargraph is not connected to the audio source, I used a 3 gang 100K potentiometer, 2 gang for the 2 EQ channel and 1 gang for the display that is completely independent but perfectly tuned with the rotation of the potentiometer.....all the best
  Reply With Quote
Old 11th May 2020, 12:45 PM   #13
miaulon is offline miaulon
diyAudio Member
 
Join Date: Dec 2019
Location: Germany
That's an amazing build. And thanks for the follow-up!
  Reply With Quote
Old 11th May 2020, 05:14 PM   #14
kissabout2002 is offline kissabout2002  Italy
diyAudio Member
 
Join Date: Sep 2018
Location: Philippines
Thank you for your comment...all the best
  Reply With Quote
Old 11th May 2020, 05:30 PM   #15
maton00 is offline maton00  Mexico
diyAudio Member
 
maton00's Avatar
 
Join Date: Feb 2012
Location: Qro. MÉXICO
Send a message via MSN to maton00
Thats a great craftmanship, im intriged with the use of those triodes that must be a challenge
  Reply With Quote
Old 11th May 2020, 06:02 PM   #16
demetrios is offline demetrios  Greece
diyAudio Member
 
Join Date: May 2011
Location: Athens
Quote:
Originally Posted by kissabout2002 View Post
Thank you for your comment, there is 10 channel but one valve for the channel 1kHz is fixed on the bottom of the chassis close to the guitar string, there was absolutely no more space...
The bargraph is not connected to the audio source, I used a 3 gang 100K potentiometer, 2 gang for the 2 EQ channel and 1 gang for the display that is completely independent but perfectly tuned with the rotation of the potentiometer.....all the best
Nice construction !
What about the sound quality ?
  Reply With Quote
Old 11th May 2020, 06:03 PM   #17
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
Good job, boy! Enjoy.
__________________
Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
Argentine Ham Radio LW1DSE since 1987.
  Reply With Quote
Old 12th May 2020, 03:41 AM   #18
kissabout2002 is offline kissabout2002  Italy
diyAudio Member
 
Join Date: Sep 2018
Location: Philippines
Quote:
Originally Posted by demetrios View Post
Nice construction !
What about the sound quality ?
Hi Demetrios,

Sound quality is extremely good and exactly what I was expected, the equalisation is very smooth and gentle, 5/6 dB boost or cut, THD 0.090% measured, no noise or hum whatsoever, death silent.

But the journey has been not so easy, first I replace 12AX7 with 6N2P-EV more reliable and performing, then on prototype test realise how long wires also not shielded was a real problem and every small details on the build count then I complicate the all project with the add of the led bar graph, so all together takes more than one year to complete the project, actually you were the fist suggest this EQ and I am now very very happy.

Next project will be the "Blonder-Tongue Audio Baton", that is a different approach on EQ of the tube era with a more sharp response, so I keep myself busy.....all the best to you and keep yourself safe.....ciaooooo
  Reply With Quote
Old 12th May 2020, 03:44 AM   #19
kissabout2002 is offline kissabout2002  Italy
diyAudio Member
 
Join Date: Sep 2018
Location: Philippines
Quote:
Originally Posted by Osvaldo de Banfield View Post
Good job, boy! Enjoy.
Thank you Osvaldo for the "boy" now I feel much better...
  Reply With Quote
Old 12th May 2020, 03:46 AM   #20
kissabout2002 is offline kissabout2002  Italy
diyAudio Member
 
Join Date: Sep 2018
Location: Philippines
Quote:
Originally Posted by maton00 View Post
Thats a great craftmanship, im intriged with the use of those triodes that must be a challenge
Thanks for your comment, yes is a challenge but manageable.... ...all the best
  Reply With Quote

Reply


10 band EQ all tubesHide this!Advertise here!
Thread Tools

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
Tang Band Tang Band W8Q-1071F 8 X 12 box reccomendation permo Subwoofers 216 9th June 2018 09:57 PM
Tang Band W4 Bamboo and tiny tang band tweeter? Jeremy067390 Full Range 2 30th March 2017 03:11 AM
WTD: Tang Band W3-1878 and Tang Band W4-1337SDF smallangryboy Swap Meet 3 10th September 2013 07:49 PM
Tang Band W3-593SF vs. Tang Band W3-926SD Zaputh Full Range 17 6th June 2009 12:37 AM


New To Site? Need Help?

All times are GMT. The time now is 09:09 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki