DD Z2 bursts output transistors

[Perry Babin]

Post what you have on the collectors of Q7 and Q9.

 

[yoppi]

this pulse is what I get in the collector of q7 and q9

 

[Perry Babin]

That's probably because the rail voltage is so close to ground. Do you have a small (no high current needed) 12v power supply with an output that is completely isolated from ground?

A 9v battery may also work.

Whichever you have, connect it to the negative rail caps. Negative terminal of negative rail cap to the ground of the supply or the negative terminal of the 9v battery. Monitor the temperature of the 9v battery. It may get hot charging the caps.

Does that give you a better drive signal on those transistors?

 

[yoppi]

The positive terminal of the power supply 12v to positive rail caps??

 

[Perry Babin]

Nothing on the positive rail caps. Are you 100% sure that this 12v supply has an isolated secondary?

 

[yoppi]

I will use a 9v battery

 

[yoppi]

I have connected the negative tip of the 9v battery to the negative rail, but I have not had any variation.

 

[Perry Babin]

Battery negative terminal to negative terminal of negative rail cap.

Battery positive terminal to positive terminal of negative rail cap.

Is that what you did?

 

[yoppi]

only negative terminal on negative rail. so I understand you

 

[Perry Babin]

You have to connect both terminals of the battery to the rail cap.

 

[yoppi]

I have connected the 9v battery. I have managed to see a stronger wave than the previous ones in the gate of the transistors. but it is very irregular. also has a small noise in the area of output toroids ....
Could I send you a video privately?

 

[Perry Babin]

As of right now, are the output FETs in or out of the circuit?

1/bank or all in (if any are in)?

How difficult would it be for you to make 4-6 wraps of small (22g or similar) around one of the transformer cores?

I'm trying to determine the best way to test safely with as many components in place as possible.