33:1 opt for 5:1 use? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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 26th March 2013, 07:45 AM   #1
diyAudio Member
Join Date: Feb 2003
Location: West Coast of Norway
Default 33:1 opt for 5:1 use?


I have a question
AN Audio note dac2.1 balanced(factory) with 6922 tubes and 5:1 IE core opts.

Is it possible to use 33:1 double c-core OPTs for this? What will the result be?
For me I will say lower output impedance and lower volume output .. But I am not excactly sure.
Will it be ok otherwise and if the system as a whole is extremely sensitive (i.e. on the volume knob) will it even be beneficial?

Best Regards
  Reply With Quote
Old 26th March 2013, 04:41 PM   #2
diyAudio Member
Richard Ellis's Avatar
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
With the ratio off that far, I doubt you will get any output.
If you want to go with a "nicer" C core.....keep looking for a matching ratio.....you quite probably will have to get one custom made.

__________________________________________________ _____Rick........
  Reply With Quote
Old 26th March 2013, 08:37 PM   #3
diyAudio Member
Vinylsavor's Avatar
Join Date: Feb 2002
Location: Lindau

Basically this is possible, but you need to verify if the 33:1 transformer is suitable to be driven by the circuit in your DAC. You are right it will provide lower output impedance and a gain lower by factor 6-7 which could be beneficial. if your system has too much gain, which you probably meant by it being too sensitive

But wether it is practical for your case even if the new transformer fits to the circuit is another question. With a 5:1 transformer the output impedance is already very low. Going much lower will not gain much. The only advantage you will have is the reduction of the excessive gain. A better approach would be to eliminate that excessive gain.

Best regards

  Reply With Quote
Old 27th March 2013, 12:04 PM   #4
diyAudio Member
Join Date: Jun 2011
sounds like you got too much gain in the preamp.

if you made this preamp,remove the cathode bypass caps to establish a better gain structure.
  Reply With Quote


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
Quad 33 Please help!!! puska Solid State 16 26th September 2011 02:46 PM
33 1/3 gramophones? AnimusDivinus Analogue Source 9 22nd September 2011 05:56 PM
Quad 33 Please Help me !!! puska Solid State 0 22nd October 2008 06:01 PM
quad 33 puska Solid State 0 21st October 2008 11:53 PM
33,000u/60V and 33,000u/75V Peter Daniel Swap Meet 2 7th March 2003 12:36 PM

New To Site? Need Help?

All times are GMT. The time now is 04:56 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2