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QUASAR AVR SMD version build

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  • #46
    If you remove the 68Ohm Resistor the Output circuit should be disabeld and no current should flow. If there ist still a high current the Diodes are defekt.

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    • #47
      Without the 68R, the hexfet is not driven an i have a nice 8khz square signal on TX0 (it seems to fit the software tuning).
      I've tryed,with differents diodes (through hole HER diodes) and the unit continuously start and stop but no heat.
      I'm using 3 // batteries with a dc to dc board. I don't know the power consuption of the det
      Ector but it's a vlf one, so, it should not drain that much..

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      • #48
        It Could be a Problem with your adc connections. The AVR meassure the current of the outputstage differentiel with the 1 Ohm resistor. If there is a Short circuit (under the 1 Ohm or at the Pins of the AVR) the Unit meassures a low current and try to increase.

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        • #49
          How to measure Rx and Tx freq? I have nothing from rx conection when i use 200 turn wire

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          • #50
            This md is better than my tgsl, even with unproper coil balance, unknown freq of tx rx, without shield, bellow neon light, high emi environment, air test only.
            How to balance the coil?, very hard to get in middle position by built-in balance calibration.

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            • #51
              Originally posted by ripsdevala View Post
              This md is better than my tgsl
              Good to get some feed back as I am about to build one.

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              • #52
                Just to make sure, what is the russian alphabet for transistor EBC?

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                • #53
                  Originally posted by ripsdevala View Post
                  Just to make sure, what is the russian alphabet for transistor EBC?

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                  • #54
                    Many thanks

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                    • #55
                      Originally posted by ripsdevala View Post
                      Just to make sure, what is the russian alphabet for transistor EBC?
                      LOL!

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                      • #56
                        New religion??

                        Hi,
                        I just made desalex board, all okay, make a beep sound, key work, but not the lcd. Im always stuck like this with desalex board, maybe i dont know something.
                        Its only show square black dot.

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                        • #57
                          Solved, RW must connect to pin 31 gnd

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                          • #58
                            @repto
                            How its going, any progress....

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                            • #59
                              Hi,
                              I'll be back home in a month. Still gets hot on tx circuit.
                              I tryed with different diodes, still the same and i've checked the schematic a billion times.
                              I bought smd AVR version board

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                              • #60
                                Looking forward, i still need asking many thing, although its have good result in the air

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