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Transformer overwind

Hypothetical as enough space for a second Tx this time. Open construction toroid Tx mainly 45-0-45V 400 watt and 10 turns of fine wire to give an IC supply of 35V,0.1 amp ac, over the thick windings and under the outer taping. No exact replacement Tx available. If you used a bulk standard 45-0-45 400VA Tx and then over the outer taping you wound some turns , would you need more turns ? Then added taping over that overwind and allowance/padding for mounting forces over the end faces.

Reply to
N_Cook
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"Nutcase Kook "

** Need way more than 10 turns.

** No.

You get a fixed voltage per turn - depending on the core size.

A 1 square inch core gives about 0.2 to 0.25 volts per turn - the bigger the core, the more the volts.

Simple trick is to loosely wind about 10 turns on the tranny and check the resulting voltage with a DMM.

Then you know the turns per volt.

... Phil

Reply to
Phil Allison

400VA

more

3.5V,0.1 amp ac for CCD display , poor printing of schematic
Reply to
N_Cook

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