02-07-2019, 01:45 AM
I rewound one for a Philco 45 IF transformer and used plain enameled magnet wire of the same size. It had a wood core. I looked for about three hours trying to find where it was open with no luck.
I am sure someone know why they used that strange woven wire.
I slid the old coil off whole after a little cleaning of the wood dowel. I carefully measured the distance from the end before removing the old one for placement of the new one.
I used masking tape ( the green stuff) to make a form for winding the new coil. After I had enough thickness of tape I used an xacto knife to cut out a section where the new coil is to sit on the core.
Now I cold not measure the inductance of the old one but since it looked just like the other coil on the same wooden core, I wound the new one to match It's inductance (at this point what have I got to lose.) I used my capacitor checker which can measure inductance to match them. I didn't try and match the number of turns.
I used my cordless drill to wind the wire. It took three tries to get something that might work. The first time I had about three times too much inductance. I just kept removing wire until I had a match.
I used a little super glue to hold it's shape and baking soda to cure it. It wasn't real pretty but it worked.
It actually tuned.
I will try and post a picture of it later.
I am sure someone know why they used that strange woven wire.
I slid the old coil off whole after a little cleaning of the wood dowel. I carefully measured the distance from the end before removing the old one for placement of the new one.
I used masking tape ( the green stuff) to make a form for winding the new coil. After I had enough thickness of tape I used an xacto knife to cut out a section where the new coil is to sit on the core.
Now I cold not measure the inductance of the old one but since it looked just like the other coil on the same wooden core, I wound the new one to match It's inductance (at this point what have I got to lose.) I used my capacitor checker which can measure inductance to match them. I didn't try and match the number of turns.
I used my cordless drill to wind the wire. It took three tries to get something that might work. The first time I had about three times too much inductance. I just kept removing wire until I had a match.
I used a little super glue to hold it's shape and baking soda to cure it. It wasn't real pretty but it worked.
It actually tuned.
I will try and post a picture of it later.
!!!!!!!!!!!!!!!!!!!RESISTANCE IS FUTILE!!!!!!!!!!!!!!!!!!!!!!
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[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif] Chris