Eye tube for balancing multi amp system - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

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

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 10th September 2008, 06:04 PM   #1
diyAudio Member
 
Join Date: Jun 2004
Location: Indiana
Default Eye tube for balancing multi amp system

I was thinking about a level indicator for balancing a multi-amp system and got to thinking that a full up VU meter seemed like overkill. Why not just use a magic eye indicator.

The idea is to take a two or more element bar graph type like the 6AL7 with one element (say the left bar graph) connected to a variable voltage controlled by a front panel pot and the right bar graph fed an amplified and rectified microphone signal.

One doesn't need to know actual dB variation just match two signals. So you play a midrange warble tone the level of which is displayed on the right bar graph. Use the front panel control to set the left hand display to the same level. Now use warble tones at other frequencies of interest and adjust the amplifier gain controls so that the right hand display matches the left hand display.

Of course if one isn't concerned with the actual dB measurement one could just use any old junk box meter movement in the same way with no more complexity or expense but the eye tube would look cool.
__________________
If We The People refuse to hear the truth we will be ruled by liars.
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Multi-purpose tube amp (line and guitar inputs) smsmonster Tubes / Valves 28 20th May 2006 12:12 AM
power distrobution in a multi-way system maxw Multi-Way 10 24th August 2005 09:17 PM
switch help for multi room sound system bser Multi-Way 1 25th July 2005 06:18 AM
Multi-Channel Volume Balancing Firebug24k Chip Amps 3 22nd February 2005 06:13 AM
Multi-room audio system (speakers & Amp question) dwalter Multi-Way 0 17th November 2004 07:22 PM


New To Site? Need Help?

All times are GMT. The time now is 02:33 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2