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Hoffman Amps Forum image Author Topic: 022905 ohms  (Read 2210 times)

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Offline shooter

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022905 ohms
« on: November 11, 2012, 04:39:13 pm »
I found the specs for the output transformer 022905, listed 7000 for primary, 4 for output.  Is that impedence or actual ohms?  cuz i'm reading 213ohms pri and .4ohms secondary.  just about done with hardwiring but wanna be sure b4 i lite it up.  thanks
dave
Went Class C for efficiency

Offline kagliostro

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Re: 022905 ohms
« Reply #1 on: November 11, 2012, 04:43:27 pm »
Means impedance

K
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Offline PRR

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Re: 022905 ohms
« Reply #2 on: November 11, 2012, 05:17:52 pm »
DC Resistance "must" be much less than Working Audio Impedance.

The DCR is a dead loss. Ideally it will be zero. In real-life we only try to make it "small", 5%-10% of the working audio impedance. You find 3% pri 10% sec, which suggests the labor/cost of very fine wire favored rounding-up primary gauge and rounding-down secondary gauge to fit.

Offline shooter

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Re: 022905 ohms
« Reply #3 on: November 12, 2012, 06:24:26 am »
thanks
Went Class C for efficiency

 


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