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

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

Lundahl LL1527 phase-splitter
Lundahl LL1527 phase-splitter
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 22nd December 2007, 07:37 PM   #1
Klimon is offline Klimon  Belgium
diyAudio Member
 
Join Date: Apr 2005
Location: Leuven
Default Lundahl LL1527 phase-splitter

Is Lundahl LL1527 suited as input phase-splitter for a 'hifi' amp? Say 2V input signal and 6sn7 as load.

thanks!!

Simon
  Reply With Quote
Old 22nd December 2007, 09:15 PM   #2
KevinC is offline KevinC  United States
diyAudio Member
 
Join Date: Feb 2003
Location: central NC
Send a message via AIM to KevinC
The LL1527 will work, but there are other more suitable transformers in the Lundahl catalog. The LL1592 is the best choice with a mu metal core and the LL1690 is the best with a cobalt amorphous core. These can be used 1+1:1+1 and 1:1+1 (with the primary coils in parallel) for phase splitting.
__________________
Kevin Carter
K&K Audio, www.kandkaudio.com
  Reply With Quote
Old 23rd December 2007, 01:23 AM   #3
SY is offline SY  United States
On Hiatus
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Lundahl LL1527 phase-splitter
Whichever you use, do try to optimize the loading, taking into account the input and Miller capacitance of the 6SN7 and the source impedance of your preamp. Usually, diddling the value of the resistive load on the secondary and/or using a Zobel will greatly clean up the time domain behavior.
__________________
"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
  Reply With Quote
Old 23rd December 2007, 01:41 AM   #4
KevinC is offline KevinC  United States
diyAudio Member
 
Join Date: Feb 2003
Location: central NC
Send a message via AIM to KevinC
But if you do endeavor to fiddle with loading, listen as you do it. Not all transformer loading networks that look good on the scope sound good to the ear.
__________________
Kevin Carter
K&K Audio, www.kandkaudio.com
  Reply With Quote
Old 23rd December 2007, 09:05 AM   #5
Klimon is offline Klimon  Belgium
diyAudio Member
 
Join Date: Apr 2005
Location: Leuven
1527 suits my lack of budget best
I'll keep the zobel idea in mind; thanks for the replies

Simon
  Reply With Quote
Old 23rd December 2007, 06:12 PM   #6
Shoog is offline Shoog
diyAudio Member
 
Shoog's Avatar
 
Join Date: Aug 2002
Location: Eire
I would agree with SY, these babies can ring and overshoot like crazy. I have about 300K load on each of my secondaries, and that cleaned up the top end a load.

Shoog
  Reply With Quote

Reply


Lundahl LL1527 phase-splitterHide 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
Is this a phase splitter? tom-vdl Solid State 9 15th October 2009 08:21 PM
Possible group buy of Lundahl input/phase splitter transformers. Shoog Tubes / Valves 51 14th November 2008 11:45 AM
phase splitter with Tr ? sam8888ysl Tubes / Valves 9 22nd October 2008 11:28 AM
Phase Splitter Name Gold_xyz Tubes / Valves 17 21st February 2008 09:48 AM


New To Site? Need Help?

All times are GMT. The time now is 12:37 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki