Kapanadze Cousin - DALLY FREE ENERGY

[Hoppy]

That pulse width range might be sufficient to elicit the DSR effect in some suitable diodes.
It is not surprising that you are getting 35mA out of 2 TTL outputs connected in parallel.

So how quickly can the 74HCT00N switch the MJL21194 transistor, from 0 to 2 Amps ?
In other words what rise/fall times are you getting with this setup ?

Yes, I'm forgetting that two TTL outputs are in parallel.

I need to re-build the transistor /DSR stage, so will take some measurements in due course.

Regards
Hoppy

[verpies]

I need to re-build the transistor /DSR stage, so will take some measurements in due course.

It's enough to measure the rise/fall times of the MJL21194 transistor, when it is loaded only with a 4.7Ω resistor on the collector (assuming 12V power supply).

[Hoppy]

It's enough to measure the rise/fall times of the MJL21194 transistor, when it is loaded only with a 4.7Ω resistor on the collector (assuming 12V power supply).

Attached is two scope shots. The first 08 is taken C/E with 5R load resistor (x1 probe on collector). The second 09 is taken across 5R resistor (x1 probe on top of resistor - supply rail) showing pulse just short of 2A peak. Supply rail 12V. Frequency 22.73Khz

Regards
Hoppy

[verpies]

Attached is two scope shots. The first 08 is taken C/E with 5R load resistor (x1 probe on collector). The second 09 is taken across 5R resistor (x1 probe on top of resistor - supply rail) showing pulse just short of 2A peak. Supply rail 12V. Frequency 22.73Khz

According to this, it takes more than 1μs to switch this BJT by the two TTL outputs.
Please let me know your thoughts, why it is so slow.
This means that it is impossible to get nanosecond pulse widths at the primary of Tr1, with this setup.

Also, Mr. Belkin and other publications state, that DSR Diodes require forward pumping pulses shorter than 1μs for them to manifest the DSR effect.

[Hoppy]

According to this, it takes more than 1μs to switch this BJT by the two TTL outputs.
Please let me know your thoughts, why it is so slow.
This means that it is impossible to get nanosecond pulse widths at the primary of Tr1, with this setup.

Also, Mr. Belkin and other publications state, that DSR Diodes require forward pumping pulses shorter than 1μs for them to manifest the DSR effect.

My build is not good, so I can probably get under 1us with a good build. Will re-measure next week when I have time to re-build.

Anyway, it does now look possible to get DSR operation with a setup as per Dally's schematic.

I got over the nano 'flipping' problem by just using a TTL chip in the VCO slot.

Regards
Hoppy