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V5 not receiving local am stations
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Sorry that it has stopped working.? You have not given us enough information to point you in the correct direction to fix it.
Let's start simple: do you hear static from the uBitx with the antenna connected, and nothing when the antenna is disconnected? If so, then the audio sections are OK and we will need to go on to the RF and IF sections. It would also help to know what type of test equipment that you have and what may have happened between the time it was working and now. Let us know. 73 Evan AC9TU |
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I checked the source code on Ian's, KD8CEC, github account and found that there are two different limits for frequency limits:
Lines 112-118 // limits the tuning and working range of the ubitx between 3 MHz and 30 MHz
#define LOWEST_FREQ? (3000000l)
#define HIGHEST_FREQ (30000000l)
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//When the frequency is moved by the dial, the maximum value by KD8CEC
#define LOWEST_FREQ_DIAL? (3000l)
#define HIGHEST_FREQ_DIAL (60000000l) Based on the descriptions only (I will need to dig in deeper to see if this is true), I would suggest you go to the 80 meter band and tune down manually from there. The alternative is to change the #define LOWEST_FREQ? (3000000l) to a value lower than the station you want to receive.? Then recompile and download. 73 Evan AC9TU |
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I just put CEC V1.2 on my V5 and it tunes only to just below 3.0 MHz.
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On 2/24/20, Evan Hand <elhandjr@...> wrote:
What software are you using on the uBitx?? Stock or another version like |
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I went back and verified that if you tune down from above 3 MHz it does go below 1 MHz.? If you accept the 100 Hz tuning step, that is a LOT of turns of the dial.? I have the Nextion display on my v5 and set the tuning step to 1 KHz.? Still a lot of dial turning.
I was able to tune in to the AM stations here in the US. One caution: the most accurate adjustment of the master crystal is at the highest reference that you can receive.? There is a multiplication effect the lower the frequency that you use to calibrate.? I would look up a SW am station frequency in your area of the world, and use that.? The alternative is a known good frequency source (signal generator) and use that. 73 Evan AC9TU |
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Vagter your medsage i checked again my local am station on 738khz. It is clean reception..? Ascalready suggested with kd8cec firmware, selectv160m and? with 1khz step tune down to wanted frequency. . I receive long distance stations too.? Perhaps if your antenna nulls to the station, signal might be weak. On Mon, 24 Feb 2020, 7:24 pm Daniel Flanagan, <danflan49@...> wrote: I just put CEC V1.2 on my V5 and it tunes only to just below 3.0 MHz. |
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Hi Maurice,
I can't help you without more information.? What specifically is not working? The video shows that it can work and does for me, V5, CEC 1.2 firmware and Nextion display.? I believe there may be a setting in uBitx memory manager to allow tuning outside the ham bands, but I don't have time to research it this morning. 73, Dean KK4DAS |
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Maurice Bersan
Solved!
Thanks to all who helped. It turned out to be my manual antenna tuner not being able to tune in MW. I connected my antenna straight in to my ubitx and all those MW broadcast stations came to life. Someone on this forum did mention my antenna, I should of listened earlier.? Cheers Maurice Vk6hly |
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?A number of antenna tuners have the option of bypassing so the antenna is basically bypassed. ?My autotuner, as well as an older manual tuner have the option. ?? ?And I am going to have to replace coax due to a fire in the shed where they pass through. ?Wayne WA2YNE On Tue, Feb 25, 2020, 8:57 PM Maurice Bersan via Groups.Io <Vk6hly=[email protected]> wrote: Solved! |
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