Akula eternal lantern 4

[d3x0r]

Here's a more complete circuit between the oscillator and the gate, since the capacitance/resistor will matter.
Can probably be fixed values... but the 0-220 will probably have to be changed between various fixed values.

[itsu]

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Input voltage is probably 12V

Does this picture not shows that he uses 3.1V input?

Regards Itsu

[d3x0r]

Does this picture not shows that he uses 3.1V input?

Regards Itsu

ya; was thinking about that later.... when I was looking the blow-up of the DC status.... 2.0V... I Guess it's about a divisiion and a half. It woulda beeen like 24V, but then the gate voltage didn't make sense... so ya makes sense he's testing at 3.1.
so probes are at 1x.

[itsu]

Here's a more complete circuit between the oscillator and the gate, since the capacitance/resistor will matter.
Can probably be fixed values... but the 0-220 will probably have to be changed between various fixed values.

I have been testing with this diagram, but no way to get the negative signal on the collector.
Using MJE13005 and MJE13007 with 9, 12 and latest 3V input.
Input pulse used is an all positive 1 to 4V amplitude, 0.3 to 20% duty cycle, 100Hz to 3MHz frequency signal from my FG.
The 220pF variable capacitor shows no effect at all.

The below screenshot is taken at 3.1V input, at 15Khz with 15% duty cycle

Yellow = base signal
Blue    = collector signal
Purple = FG input at the 10nF/10 Ohm cap/resistor
Green  = current probe output on plus input voltage lead (set at 20mA/div.).

Regards Itsu

[Void]

Thanks for that Itsu. I have not been able to reproduce the original strange waveforms I got
when I first tried some testing looking for an effect similar to what Akula shows in his Lantern 4 video.
Maybe what I saw was just due to some glitch or instability with my pulser board. Still testing with this however.
All the best.