Unknown PI detector

[aft_72005]

Hi
Unknown PI detector .
I remember this circuit published in this forum many years ago .
Also if I remember correct it was from Russia
Is there are hex file for it ?

[6666]

Is there any more to the circuit ?

[ivconic]

What would be the roles of T2 and T3?

[6666]

What would be the roles of T2 and T3?

??????

[ivconic]

More power? More current?
One BU is enough.
Overkill.

[Nandor]

Function generator? maybe not even a detector.

[ivconic]

Function generator? maybe not even a detector.

Rather like HHO generator.
I can tell; BU is my middle name.
I wasted kilos and kilos of those... back in '90s.
One is enough.
3 are total overkill.
Can't imagine the sampling stage on this.
Author is son of a gun.

[aft_72005]

Use 3 Tr. Because low CE resistance. More current allow to coil.

[aft_72005]

No it is Pi detector. That section is only transmitter

[aft_72005]

May be from Bulgaria or Russia. Any body have hex file?

[boilcoil]

Use 3 Tr. Because low CE resistance. More current allow to coil.

No. Collector-emittersaturation voltage of BU508 is 1V. It is the same of all group transistors
Maybe they use 3 tr-rs for more pulse avalanche energy rating in the moment of turn off coil (for ex > let Icoil=2A, Ucoil=Ic*Re=3*300/2*2=900V; Collector-emittersustaining voltage=700V> that means will be avalanche break collector-emitter)

[profesor]

https://shema.info/en/consumer-elect...-on-chips.html

[profesor]

https://shema.info/pdf.php?pdf=4816

[aft_72005]

OK but there isn't hex file!!!!

[boilcoil]

OK but there isn't hex file!!!!

Don't use this schematic, this is bull****. This is at fully analogue schmatic in receiving part, and аlmost nonsense in TX.
You can do it without any microcontroler and you don't need hex file.
If you want to bild simple PI mashine - do PI surfmaster.