"Quantum Receiver".

[synchro1]

1 Set Mini Tesla Coil Kit 15W Mini Music Tesla Coil Plasma Speaker Tesla Wireless Transmission DC .... 13.56MHz I2C/SPI RFID MF RC522 Wireless Module.

What do you make of this information?

[skywatcher]

What do you make of this information?

I don't know where you got this from. There are many ebay sellers for this item.

http://www.icstation.com/mini-music-tesla-coil-plasma-speaker-plasma-loudspeaker-tesla-wireless-transmission-kits-module-p-12005.html
On this page you can find lots of pictures and videos about this generator.
In one picture you can see '0.12/350T' printed on the PCB. I think this means 350 turns of 0.12mm wire. You could enter this data into the calculator to get an estimate for the SRF. But i'm sure it's not 13.56 MHz. Not even close.

[skywatcher]

A BD243 transistor is used in the kit, which has a transition frequency of 3 MHz. So we can assume that the working frequency is well below 3 MHz.

[synchro1]

A BD243 transistor is used in the kit, which has a transition frequency of 3 MHz. So we can assume that the working frequency is well below 3 MHz.

The circuit is complex. How do you know what the transistor is for? We'll find out after my models arrive, but the posted operating frequency for the Toy is 13.56.

Here's a video of Lidmotor adapting the "Music Coil" to a Stifler SEC circuit:

https://www.youtube.com/watch?v=2Xi0Vv3qHq4


Quote from Lidmotor:


"This is the coil from the Mini Tesla Coil kit being used on my old homemade  Dr. Stiffler SEC 15-3 Exciter.  The coil worked great"! He identifies it as an L-3 coil.

[sm0ky2]

You "assume" it is operating at the low-freq characteristics
Because this transistor is primarily used as a power-gain MOSFET
However, it makes a perfectly useful switch at higher frequencies
Though the current gain curve levels out at 1


How did you see that it was a BD243?
I can't see anything in these pictures, he's got them upside down