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dyna MK III output trans resistance reading

172.249.65.47
Posted on September 24, 2014 at 23:35:23
tubeflash
Audiophile

Posts: 223
Joined: December 22, 2001
 my dyna mk III output trans has resistance readings that concern me
please advise.
Center tap B+ to blue plate lead 120 ohms
center tap B+ to blue-white plate lead 80 ohms
are these readings indicative of a properly functioning
MK III output transformer
thanks

 

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RE: dyna MK III output trans resistance reading, posted on September 25, 2014 at 11:17:37
llwhtt
Audiophile

Posts: 192
Location: SOCAL
Joined: October 28, 2008
 These are the measurements on new Triode MKIII outputs:

Blue-CT= 67.5 Ohms

Blue/White-CT= 77 Ohms

Green-CT= 22.5 Ohms

Green/White-CT= 25.7 Ohms

Craig

 

RE: dyna MK III output trans resistance reading, posted on September 25, 2014 at 12:25:00
altecboy
Audiophile

Posts: 404
Location: Northern NJ
Joined: May 29, 2004
 Go over to to the Dynakit Basket site.
http://dynacotubeaudio.forumotion.com/t234-dynakit-mark3-transformer-testing

There are measurement guidelines there.

 

RE: dyna MK III output trans resistance reading, posted on May 30, 2017 at 14:46:35
Audio Pete
Manufacturer

Posts: 152
Location: Long Island,NY
Joined: May 22, 2015
 Yes, that's correct for ANY output transformer that's not Bifilar wound. Because one half of the output coil is wrapped around the other, one has a larger diameter and therefore more wire, hence more resistance. But, the inductance is correct for each half and that's what counts here.

 

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