Start TGSL built

[ripsdevala]

OMG...
Sorry for the trouble i just found that i wrong put the Rx Tx... sorry

Its work now
How do i nulling this, same maner?

[CDI]

Same, pin 7 of LF353. AC 200mv range on multimeter. Good luck.

[ripsdevala]

Thanks CDI

[ripsdevala]

Back to V.3 to troubleshoot, now with oscilloscope...
The last time I get max deep is about 25cm+ for coin, what should i test now?, never use an oscope before, I know how its work but need help.

[ripsdevala]

Following don Bowser procedure

Div 0.5v 20 us, freq = 32khz... Is this right???
Step 2

[blobber]

32 khz...no you should have 14,5 kHz in TX circuit.

[blobber]

http://www.sengpielaudio.com/calculator-period.htm

Your calculation is probably wrong, here you can make calculation period to frequency.

[blobber]

Following don Bowser procedure
[ATTACH]37043[/ATTACH]
Div 0.5v 20 us, freq = 32khz... Is this right???
Step 2
[ATTACH]37044[/ATTACH]

Your second picture looks good.
But in any case, you have to check the proper frequency in TX circuit. Could you please pictures in front of your oscilloscope!

[ripsdevala]

Wait, i was confuse with time div pot it have 21 click but the value is only 20 from us to ms

[ripsdevala]

Your second picture looks good.
But in any case, you have to check the proper frequency in TX circuit. Could you please pictures in front of your oscilloscope!

If i put the knop in 20us 5v 1.4 div, the frequency is 35khz, in 50us 5v 0.65 div is 3khz, the right calculation is 50us 5v 1.4div is 14.2khz, is the knop in wrong position?

Front panel

[ripsdevala]

Don bowers have 5v 20us 1.4div that should be 35khz, or im do a wrong calculation

[blobber]

This is what I have for TX channel 1 yellow, RX channel 2 green.

[ripsdevala]

This is what I have for TX channel 1 yellow, RX channel 2 green.


[ATTACH]37049[/ATTACH]

Your calculation is right 20us 3.4div = 14.5+khz

So, did i do bad calculation? Or my knob is in wrong direction, i just check it an hour ago with builtin square wave 0.5v 1khz and 50us is the right position to get proper calculation of 14.2khz, how to increase it to 14.5khz ??

[ripsdevala]

I think this is right
20us 3.5div = 14.2khz
Wave

Calc
.

[blobber]

This is much better.
Now you can check the frequency, when you put the RX coil in TX cirquit. In your case, you should have approximately 14,7 kHz.
approximately