Ok, you guys speak of ISDN transformers so much that you have me interested. How many Volt*Seconds (E*T) do they have? It is not listed. What is their lower frequency point at what voltage so I can calculate E*T.
Thanks, Harry D.
ISDN transformers
May 06, 2015
3 Replies
I've got some data on that, at work. I'll try to find it.
I got burned by a shocking low Curie temperature. I was using them as pulse transformers and they saturated at the high end of our operating temp range.
I just tested one for use at 300 Hz. I'll post those numbers, too.
John Larkin Highland Technology, Inc
picosecond timing laser drivers and controllers
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
Note that Bsat decreases exponentially as Tc is approached, until it goes to zero flux density above Tc (ferr(o/i)magnetism disappears). For ferrite, Tc is usually something like 120-250C, with 170 being typical I think.
Tim
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: http://seventransistorlabs.com
I posted one measurement in the CT thread.
John Larkin Highland Technology, Inc
picosecond timing precision measurement
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
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