HammerHead Problem

[Silver Dollar]

So I went back to active turn off and she works! The min delay from TX off seems to
be 13 us;


With 470 ohm damping resistor she rings a bit;


With 390 a little less ringing;


I guess I'm going to have to make a damping resistor setup to find the right value.

It transmits and receives but still no sound too so more troubleshooting is in order.

[6666]

Not a problem!

I found my problem, R10 was open! I know I measured it when I installed it.
I'm not sure if it popped due to excessive voltage or just failed when the leads
were bent but we are back in business. I am going to go back to the active
shut off and 2 stage gain as I think it will make a faster detector!

Thats unusual , but you found it.

[surfdetector]

Hopefully this works.
Here are the photos of my board, I hope it helps. You can see we have different resistors installed and jumpers. Maybe your double front end has caused you to change these I dont know but hope you get it going!


[ATTACH]31460[/ATTACH][ATTACH]31461[/ATTACH][ATTACH]31462[/ATTACH][ATTACH]31463[/ATTACH]

I realize that it is now 6 years later, but I wanted to thank you for posting those pictures. They are really helpful.