Coil - Can the circuit be adapted for AWG 19 and 25, the wire from MOTs

[wrtner]

The microwave oven mains transformer has a free supply of excellent copper
enamel coated wire. (An effort to get to, but well worth the aggravation).

For a mains voltage of 240 volts, the wire is approx 0.45mm and 0.95mm,
i.e. AWG 25 and 19. (The weight of the thin wire coil is around 800g and
the thick coil 430g, for those who might work out the consequent length).

Is there a way to use this free wire on the bifilar coil and adapt the circuit
if necessary?

Paul-R

[Tachyon Catcher]

Paul,
I have used AWG 18 to 28 for my coils. I have used coils with shorter trigger (200ft)28# and 300ft power winding 18#. I have used all 23# at 350ft for both trigger and power. All worked with the same circuit, just changed resistance on trigger for tuning. After I cooked the first 3055 on my first attempt in less than ten minutes I have used MJLs without too many problems. You can use that wire without issue as long as the enamel is not skinned to the point of causing a short in the coil.
Randy

[Tom C]

make your wire have around 1 ohm resistance on the power winding, that is a good start, however that figures into wire length, I dont have my chart handy.
Tom

[Faraday88]

Hi Paul-R,

You will need equal lenghts of wires for the bifilar winds, in the MOT transformer the primary and secondary winds are unequal, although the facts that using disimilar thickness of wires for the power and the trigger makes sense in a deeper understanding, here in this case it fails due to unequal length.
rgds,
Faraday88.

[Tom C]

Hi Paul-R,

You will need equal lenghts of wires for the bifilar winds, in the MOT transformer the primary and secondary winds are unequal, although the facts that using disimilar thickness of wires for the power and the trigger makes sense in a deeper understanding, here in this case it fails due to unequal length.
rgds,
Faraday88.

yes make your power winding at 1 ohm then your trigger the same length.
Tom C