Bitx40 Transmit Problem
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I received my Bitx40 v3 kit a couple of months ago and I've never been able to get it on the air.? I've done a lot of troubleshooting, tried updating the sketch in the Arduino twice, watched several YouTube vids (including AF's troubleshooting video), and gotten assistance from a couple of people on the Bitx40 v3 Facebook page.? I am very confident the wiring is correct and the radio will tune and receive stations fine.? The problem is that the radio does not appear to be transmitting.? I used my digital ammeter today and testing it shows that in receive and/or transmit, it is drawing 0.9 mA.? I have tried to realign the board per the instructions, but that didn't change the 0.9 mA reading.? I also checked the power to various components and it's reading 12v.? Related to this, I installed a switch to incorporate the function button feature, but it does not work either and I have gotten confirmation that it is the correct type of switch and has been wired in correctly.? I also did the PTT sense mod and I do get a TX indication on the display when I transmit, but again, I don't see the types of readings on the ammeter that have been described by AF's instructions.? I am concerned there is something wrong with the board. I am a novice with electronics, so I am at a total loss at this point.? Can anyone assist?? Thanks! |
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I presume that you are reading 0.9 amps not milliamps. 900mA is too much by itself without shouting into the mic. Possible final blown, assuming you are getting 0.9A when you press PTT without modulation. Before you put a new final Tr. turn the bias pot RV1 fully clockwise. Raj At 08-06-2017, you wrote: I received my Bitx40 v3 kit a couple of months ago and I've never been able to get it on the air.? I've done a lot of troubleshooting, tried updating the sketch in the Arduino twice, watched several YouTube vids (including AF's troubleshooting video), and gotten assistance from a couple of people on the Bitx40 v3 Facebook page.? I am very confident the wiring is correct and the radio will tune and receive stations fine.? The problem is that the radio does not appear to be transmitting.? I used my digital ammeter today and testing it shows that in receive and/or transmit, it is drawing 0.9 mA.? I have tried to realign the board per the instructions, but that didn't change the 0.9 mA reading.? I also checked the power to various components and it's reading 12v.? Related to this, I installed a switch to incorporate the function button feature, but it does not work either and I have gotten confirmation that it is the correct type of switch and has been wired in correctly.? I also did the PTT sense mod and I do get a TX indication on the display when I transmit, but again, I don't see the types of readings on the ammeter that have been described by AF's instructions.? I am concerned there is something wrong with the board. |
Rob N4RMK
Raj vu2zap