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Overunity Machines Forum



Blocking Oscillator fun and surprises.

Started by Legalizeshemp420, October 18, 2013, 10:52:15 PM

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Legalizeshemp420

October 18, 2013, 10:52:15 PM
I was pleasantly surprised by this circuit and I never once thought it would get so high, and stable, in frequency.  If I changed the parts I wonder how high I could get it?

If anyone knows why I can't get the trigger transformer to work please let me know as I have hit a brick wall with it.

http://www.youtube.com/watch?v=FQ5_6UXPN9I

Legalizeshemp420

#1
October 19, 2013, 12:24:09 AM
Led was about half as bright but by adding a .005 ceramic cap in parallel with the base resistor I managed to increase the frequency of this oscillator.

TinselKoala

#2
October 19, 2013, 01:07:15 AM
Did you double-check your frequency counter reading by doing a manual computation on the scopetrace? What's the timebase setting on the scope?

Legalizeshemp420

#3
October 19, 2013, 01:08:49 AM
.5uS I can't go any lower.

TinselKoala

#4
October 19, 2013, 01:14:18 AM
Quote from: Legalizeshemp420 on October 19, 2013, 01:08:49 AM
.5uS I can't go any lower.

OK. That is 0.0000005 second or 500 nanoseconds per division. Right?

So what is the period of a 17 MHz signal?

1/17,000,000 = 0.000000058 = 58 nanoseconds. So a 17 MHz signal should have 500/58 = almost nine peaks per horizontal division.

Right? Or did I drop a decimal point again?

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