The anomalous kicks

[Rosphere]

EMdevices,

I reconfigured my coil to the 3/1 ratio as described.  The LED, (with no resistor,) does not glow in this configuration with the MOSFET I used.  (Yes, Stefan, the LED still works.)

I am not getting your results.  Please tell us your exact MOSFET component when you are able to see it again.

Rosphere--Waiting patiently. 


The LED glow in the photo is a camera flash reflection.

[EMdevices]

Rosphere,

I'm not using a MOSFET, I think its a BJT for high voltage horizontal and vertical Television coil controls.  I bought it a while ago.   It's a PNP type.  I don't have the specs on it cause I lost the cover, but I have a simular cover for a NPN I bought at the same time,  I remember they were veryclose in specs.

I'll post more later tonight.

EM

[hartiberlin]

Hi EM,
what do you mean by BJT ?

What abbreviation is this ?

Many thanks.

P.S: Why is your LED has any effect on the circuit ?
I heard some new blue-green LEDs have some kind of negative differential resistor
regimes...hmm, but this is a standard red LED ?!
Can you put a 100 nF power supply buffering cap across the battery
and the circuit still oscillates ?

[hartiberlin]

@Rosphere
if you use a MOSFET with almost no input current,
you probably have to set the DC gate working point with a voltage
divider potentiometer at the right DC operation voltage level,
so put a 10 KOhm pot between + 9 Volts and ground and
put the center pot pin additionally onto the gate.
Then adjust for the right gate-ground DC voltage until you get
oscillations.

You might also try to put the gate coil between
output of the center pot pin and the gate, so the
DC gate voltage is oscilllated-(modulated) from the coil
voltage.
Then the 2 coils just have to have the right 180 degrees phase shift to
start the oscillations.

Regards, Stefan.

[gyulasun]

Hi EM,
what do you mean by BJT ?

What abbreviation is this ?

Many thanks.

Hi Stefan,

BJT usually is short for Bipolar Junction Transistor, so it refers to a normal transistor like 2N2219 or the age old AD161 etc.

Regards
Gyula