Go Back   Home > Forums > > >

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Reply
 
Thread Tools
Old 5th January 2021, 06:49 PM   #1
cogitech is online now cogitech  Canada
diyAudio Member
 
cogitech's Avatar
 
Join Date: Jan 2011
Location: Kamloops, BC
OPT Impedance Scaling / Ratio
Default OPT Impedance Scaling / Ratio

Quick question: Does the primary impedance of an OPT scale linearly as load on the secondary changes?

In other words: If I connect 8ohm speakers to my 8ohm tap, the primary OPT impedance is 5k - so if I connect 4ohm speakers to my 8ohm tap the primary OPT impedance will drop to 2.5k (4/8=0.5*5000=2500)?

Doing the math for a different scenario:12ohm speakers on the 16ohm taps will result in 75% (12/16=0.75) of 5k = 3750 ohm primary impedance?

Same thing for 3ohm speakers on 4ohm tap?: 3/4=0.75 * 5000 = 3750 ohm primary impedance?
  Reply With Quote
Old 5th January 2021, 07:02 PM   #2
MarcelvdG is offline MarcelvdG  Netherlands
diyAudio Member
 
Join Date: Mar 2003
Location: Haarlem, the Netherlands
Yes, neglecting some second-order effects.
  Reply With Quote
Old 5th January 2021, 09:14 PM   #3
cogitech is online now cogitech  Canada
diyAudio Member
 
cogitech's Avatar
 
Join Date: Jan 2011
Location: Kamloops, BC
OPT Impedance Scaling / Ratio
Thanks for confirming, Marcel.
  Reply to this post

Reply


OPT Impedance Scaling / RatioHide this!Advertise here!
Thread Tools

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
Figuring out Heathkit T-4 OPT 51-31 turns ratio and repurpose multi-volti Tubes / Valves 8 17th January 2017 02:35 AM
Impedance ratio and T-amps Sasquatch Class D 3 14th April 2013 07:44 PM
staging impedance ratio hotironsmoke Everything Else 0 14th April 2013 12:43 PM
transformer ratio vs impedance teslaboy Planars & Exotics 1 29th February 2012 04:55 PM


New To Site? Need Help?

All times are GMT. The time now is 12:57 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki