Transformer type Low pass filter - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

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 23rd March 2008, 05:31 PM   #1
knivies is offline knivies  Hong Kong
diyAudio Member
 
Join Date: Mar 2008
Default Transformer type Low pass filter

I am currently using NOS 1541A DAC with tube LPF output. Any idea if I can replace it with output transformer ?


Thanks for sharing.
  Reply With Quote
Old 25th March 2008, 03:20 PM   #2
knivies is offline knivies  Hong Kong
diyAudio Member
 
Join Date: Mar 2008
Or is it possible to use Jensen 123ALCF to replace I/V conversion circuit ?
  Reply With Quote
Old 8th April 2008, 10:30 PM   #3
diyAudio Member
 
Join Date: Dec 2005
Location: England
Default Re: Transformer type Low pass filter

Quote:
Originally posted by knivies
I am currently using NOS 1541A DAC with tube LPF output. Any idea if I can replace it with output transformer ?


Thanks for sharing.
If you are trying to replace the whole tube output stage with a transformer, then look at this link.

http://www.audiodesignguide.com/DAC_final/DacFinal.html

However, reading most people's impressions, tube stage appears to be preferred over the transformers-only stage, with more dynamics, bass etc. I have no first hand experience of comparison though.

If you are looking to replace the coupling capacitor AFTER the tube stage then look here for output transformer coupling:

http://www.audiodesignguide.com/DacEnd/index.html

Also, two other active threads have similar exchange presently underway.

Tube DAC

6922 transformer coupled


Quote:
Originally posted by knivies


Or is it possible to use Jensen 123ALCF to replace I/V conversion circuit ?

I have replaced my 82 ohm i/v resistor with a 22 ohm resistor on the primary of a Lundahl 7905 in 1:5.6, with astounding results in my TDA1541A dac & can recommend this transformer heavily.

I used 7905 as it has a large core. I was concerned that the small amount of DC at TDA1541A's output may saturate a smaller tranny. As per Mr Lundahl, 7905 fits the bill if that is a concern. Although I couldnt tell you for sure if smaller transformer would do any different.

Best regards

Fib
  Reply With Quote
Old 18th April 2008, 12:28 PM   #4
knivies is offline knivies  Hong Kong
diyAudio Member
 
Join Date: Mar 2008
Hi Fib,


Many thanks for the info. it's very helpful. BTW., I did finally ended up with using Sowter 8347 transformer, it's a wonderful and budget choice for me.

Sowter 8347 transformer


Happy listening.


Cheers !!
  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
need help with low pass filter prezden Multi-Way 11 12th January 2009 09:04 AM
Resistor Type used by Pass Labs rsbay Pass Labs 3 30th May 2007 05:18 AM
what type of capacitor to protect tweeter in active filter setup timsch75 Multi-Way 8 9th December 2004 11:53 PM
What passive filter type? substrate Multi-Way 3 3rd March 2004 10:33 PM
What's the best cap 'TYPE' for DC filter at line input. Brian Guralnick Parts 14 11th October 2003 01:08 PM


New To Site? Need Help?

All times are GMT. The time now is 05:31 AM.


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