Agentgates´s TPU setup with strange wavehill hump

[teslaalset]

Some simple math:
1 KHz @ 50 % driving e.g. coil that is powered by 12 V and has a resistance of 1 ohm.
- Max. current in the primary will be 12 A
- Power consumed by the primary is 12V x 12A x 0.5 = 72W

I am sure the primary will get hot with these settings.

Yes, I am aware that impedance will limit the current somewhat more, but with 36 windings it will hardly count.

[agentgates]

Some simple math:
1 KHz @ 50 % driving e.g. coil that is powered by 12 V and has a resistance of 1 ohm.
- Max. current in the primary will be 12 A
- Power consumed by the primary is 12V x 12A x 0.5 = 72W

I am sure the primary will get hot with these settings.

Yes, I am aware that impedance will limit the current somewhat more, but with 36 windings it will hardly count.

Yes that is correct, but his seeking error, and I just wanted to make sure I give him 100% working data that he can rely on because I don't know his configuration in details. BTW, mine are ~4.75 ohms DC on Stefan's new sexy acrylic coil.

@Lindsay
You can try one primary at a time. Just hook it to the PG directly and you'll see your optimum.

[agentgates]

Tony
Something is different in this thread!
Feels very good.

Perhaps they tried out what I said and fight with their breaths.

[teslaalset]

Tony, I am a bit worried about your power supply and its possible behaviour.
I am using a car battery, so current is available up to 400 Amps.
With very low primary coil resistance/impedance your power supply will most likely reach its current limit, although you are applying a large capacitor parallel to its terminals.

If this happens, I wonder what the effect will be on the circuit.
Maybe it's useful to monitor your input power with an oscilloscope to see how stable your power supply is during operation.
Is this something you already have checked?

I may sound a bit critical, but I am only trying to help out issues that will be raised anyhow, I hope everybody understands that.
See them as constructive comments.

[Mannix]

@ tony .. ok more work tonight when the heat dies down here.

try one primary at a time?
I only have one primary. Have i missed something there?

thanks

lindsay