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  • Originally posted by habitbraker View Post
    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

    Comment


    • Originally posted by dfbowers View Post
      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

      Comment


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

        Comment


        • Originally posted by habitbraker View Post
          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

          Comment


          • 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

            Comment


            • 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

              Comment


              • Originally posted by 08llyj View Post
                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?

                Comment


                • 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 ...

                  Comment


                  • 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

                    Comment


                    • Originally posted by 08llyj View Post
                      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
                      Of course you're not going to have discrimination if your detector ALWAYS rings.
                      Do you have a multi-meter and have you checked power supply voltages?
                      Have you checked to see if you have tx output?
                      How could you expect help with your problem based on the scant information you provided?
                      edit: I don't believe that your coils are so far out of whack that it would cause constant tone. Look for something else.

                      Comment


                      • Hello, i have poblem with buying copper wire. Can you please tell me where can i buy wire online. I prefere ebay but i can't find copper wire there!!!
                        please help !!!

                        Comment


                        • Originally posted by juka vk View Post
                          Hello, i have poblem with buying copper wire. Can you please tell me where can i buy wire online. I prefere ebay but i can't find copper wire there!!!
                          please help !!!


                          You would probably want to use copper magnet wire for an IB coil.

                          All Categories/Business & Industrial/Electrical & Test Equipment/Connectors Switches & Wire/Wire & Cable/Magnet

                          Comment


                          • Originally posted by porkluvr View Post


                            You would probably want to use copper magnet wire for an IB coil.

                            All Categories/Business & Industrial/Electrical & Test Equipment/Connectors Switches & Wire/Wire & Cable/Magnet
                            thx man

                            Comment


                            • Magnet Wire AWG 30

                              I have found enameled wire to make a coil here:

                              http://www.bulkwire.com/wire-cable/magnet-wire.html

                              --- AWG 30 1/4 lb. 821.75 ft. In Stock $10.50

                              Cheap shipment available (USPS Priority Mail $5.95)

                              How much wire do we need?

                              Approx: 2'1" (per turn) x 220 turns = 458 ft.

                              It is sad that 821.75 ft. is only enough to make one coil set.

                              May be it is better to buy 1643.5 ft. to make at least 3 coil sets in case something goes wrong:

                              --- AWG 30 1/2 lb. 1643.5 ft. In Stock $19.12

                              Comment


                              • That's good to know, brand new stuff.

                                This surplus dealer looks cheaper but you be the judge (it's your money).
                                http://www.surplussales.com/Wire-Cable/Wire6.html

                                (but they don't always have stock.)

                                Comment

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