TESORO GOLDEN SABRE

[08llyj]

coil tgsl

thank you for answer
but how much ohms must have rx and tx so that it works.
then I to top up a resistance on the rx and the tx to catch the mistake
thx and good job guy

[eduardo1979]

The PCB Silver Dog is perfect. It's all proven and there are many people who have done this project and everything worked fine. I've never had problems with this project. You have to revise either the PCB because surely there is some error. While tensions measured (-6V) and the connections of the coils. The polarity of the transistors, etc ...

[bernte_one]

Greeting
always not succeeds has make work the detector d 'eduardo (silverdog pcb).My coil is:
rx 6.55 mh and 13.5 ohms
tx 6.17 mh and 17 ohms
the detector always rings ,i haven t discrimination.
help me

the resistance sounds a little bit low
i think you use not the thin 0,25 or 0,35 copper wire or?

[08llyj]

SILVERDOG PCB EDUARDO1979

Greeting
always not succeeds has make work the detector d 'eduardo (silverdog pcb).My coil is:
rx 6.55 mh and 13.5 ohms
tx 6.17 mh and 17 ohms
the detector always rings ,i haven t discrimination.
help me

[habitbraker]

You got -4.8V on pin4?
I so then osc is working, but something is sucking voltage. Look for shorts on PCB, and another errors. You need to get -6V or more -it just how its works - ideally (diode drop 0.7V and zero sat. voltage) it should be close to 8-1.4=6.6V

[manurespreder]

No, you need to measure negative PS voltage. For example pin4 on any opamp with respect to GND

358 -4.8

and 393 has +8
and -1v there is no -5v

[habitbraker]

No, you need to measure negative PS voltage. For example pin4 on any opamp with respect to GND

[manurespreder]

Check to see if you have -5v (could be as high as -6.2) . That will tell you whether or not your oscillator is working.

Don

If i got it right the output is only -1v i measured resistor 100k over 358 and ground

[Ed Mac]

Hi Ed!

This is video made by member Dfbowers http://www.youtube.com/watch?v=Nx4Oxac0Ufg

He will turn it on and off. You can compare. (Also performance.)

Those transient sounds are compleatly normal to have!

Glad to hear that! Now back to winding new coils

BTW I Made a quick easy counter out of an old calculator and a momentary contact switch with a roller arm.
1st open the calculator and trace which 2 contacts are for the = key. solder 2 wires to the points and then to switch. Power on the calculator and press "1" then "+" then the "=" key now every time you depress the = key ( or close the switch ) the count increases by 1... Cheap and easy. Old calculator.. probably free, switch $3 radio Shack, not losing count PRICELESS

Thanks!!
Ed

[dfbowers]

Manure spreading guy, go back and flip the board over, get a good magnifier, and look for solder bridges etc. Then check orientation of transistors and ics. Make sure you have a good power supply and getting good regulation. This is a process of elimination. It would help to have a freq. counter to see if transmitter is working.

Check to see if you have -5v (could be as high as -6.2) . That will tell you whether or not your oscillator is working.

Don

[Wiltran]

tgsl

Manure spreading guy, go back and flip the board over, get a good magnifier, and look for solder bridges etc. Then check orientation of transistors and ics. Make sure you have a good power supply and getting good regulation. This is a process of elimination. It would help to have a freq. counter to see if transmitter is working.

[manurespreder]

Hello there again i am novice in electronics and i don't know why i started with project like that so there is no surprise that my detector is still not working

i made coils from 0,3mm cu and inductance for RX is 6,45 and 5,9 for TX using usb2 cable to connect coils with circuit there is gap about 10mm in both coils. When i turn my tgsl on it make no sound at all only little noise on power up.

When i tried to change RX connection on circuit i made some noise and burned out resistor 22 Ohm's near power supply i changed it and same situation again. I am testing circuit without changes where changed resistor from 22 to 100

Now i am wondering where is my problem any thought to share with me to get my project done?

i still waiting for oscilloscope to arrive for balancing/nulling but i guess it still should work without balancing but with ugly performance?

[habitbraker]

Do you mean how much Ah should battery have? If yes, then 1Ah is plenty enough!
TGSL consumes about 30mA so do your calculations to mach your desired battery life.

[manurespreder]

Hi there i was wondering about power supply for my tgsl what the optimal apms should be.. is it enough aroung 1A?

[habitbraker]

Hi Ed!

This is video made by member Dfbowers http://www.youtube.com/watch?v=Nx4Oxac0Ufg

He will turn it on and off. You can compare. (Also performance.)

Those transient sounds are compleatly normal to have!