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

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Balanced LDR preamp
Balanced LDR preamp
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
Thread Tools Search this Thread
Old 31st December 2010, 10:32 PM   #1
bikerboy is offline bikerboy  United States
diyAudio Member
Join Date: Jan 2008
Smile Balanced LDR preamp

I have enjoyed my Lighter note ldr preamp very much and have set off to make a balanced one now. Many thanks to George for sharing his great design. I wish others would be so kind as to help us that are not so talented. Thanks to Uriah for making the lighter note and the matched ldrs readily available. I hope this thread can be about balanced ldr preamps and not about how ldrs dont work. I love the single ended lighter note I made months ago. It is the most natural sound I have heard my system make yet. I use a shigaclone into a TPA BuffaloII with tridents. I also have a balanced Retro phono preamp in the works. So 2 balanced inputs and at least 2 se inputs needed. I bought a MV-6 wireless remote kit from diyclub. It has a 6 gang 100k pot and 5 input selection on the remote. I have the kit functional and want to install the ldrs now. After reading almost all I can posted(yes, all 380 pages) it looks like I will use 4 gangs of the pot to avoid burning the wiper. I guess it will be like 2 lightspeeds, one for plus and one for minus. There have been several others with this idea of a balanced ldr so please let me know what you have tried or thoughts about this. Thanks to all the many other posters that have gone out of their way to help the electricaly challenged. DIY is the best!
  Reply With Quote
Old 1st January 2011, 12:08 PM   #2
AndrewT is offline AndrewT  Scotland
Join Date: Jul 2004
Location: Scottish Borders
Why do you need/want balanced volume control?

To get better interference rejection?
to allow existing balanced equipment to be used?
because the symmetry looks right?

If you need the benefit of interference rejection then you must convert your balanced signals to unbalanced, feed the LED/LDR, then convert unbalanced to balanced to feed the remainder of the balanced system.

If either of the other two options apply then simply run two channels to give hot and cold control.
regards Andrew T.
  Reply With Quote


Balanced LDR preampHide 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
LDR photoresistor attenuator preamp, in general romana Analog Line Level 54 14th December 2013 02:32 AM
Balanced (preamp) Outputs - Why ? ronzeman Solid State 9 24th January 2009 09:44 AM
Preamp with balanced outputs miguel2 Chip Amps 9 5th May 2004 02:19 PM
balanced preamp question bonsai171 Solid State 8 17th April 2004 03:24 AM
balanced x-Preamp Orgonom Pass Labs 10 27th March 2003 06:45 PM

New To Site? Need Help?

All times are GMT. The time now is 12:19 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio