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Alternative Calibration Procedure uBITx v6

Mark Erbaugh All Messages By This Member #83797 Following the calibration procedure for my v6, I had trouble zero beating a carrier, so I tried a modified approach that seems to work better for me. With the radio in LSB mode, I tuned 1 kHz above WWV at 5 MHz. WWV's carrier thus creates a 1 kHz tone. I used a program with an audio waterfall (I used FLDIGI) and adjusted the uBITx's tuning calibration until the tone was at 1 kHz. 73, Mark
IW4AJR Loris #83813 Hi Mark Finally someone using a "lab" approach to calibrate a receiver! Great approach! For the wealthiest: 1) fix a frequency on the receiver in LSB, 2) fix the frequency of the RF generator 1kHz above the chosen frequency, 3) connect a frequency meter to the audio output, 4) act on the calibration until reading exactly 1kHz ! Easier than that ...! Great job Mark ! thanks ! greetings Loris IW4AJR
iz oos All Messages By This Member #83814 Repeat the same on other time signals such as 10 15mhz and beyond when propagation is in a good mood toggle quoted message Show quoted text Il gio 19 nov 2020 04:13 AM Mark Erbaugh <mark.election@...> ha scritto: Following the calibration procedure for my v6, I had trouble zero beating a carrier, so I tried a modified approach that seems to work better for me. With the radio in LSB mode, I tuned 1 kHz above WWV at 5 MHz. WWV's carrier thus creates a 1 kHz tone. I used a program with an audio waterfall (I used FLDIGI) and adjusted the uBITx's tuning calibration until the tone was at 1 kHz. 73, Mark
Gordon Gibby KX4Z All Messages By This Member #83820 开云体育 This is a simple & free method because almost all digital receiving software (FLDGI, etc) accurately measure the audio freq beat tone far in excess of your needs. ? toggle quoted message Show quoted text On Nov 19, 2020, at 17:35, iz oos <and2oosiz2@...> wrote: ? Repeat the same on other time signals such as 10 15mhz and beyond when propagation is in a good mood Il gio 19 nov 2020 04:13 AM Mark Erbaugh <mark.election@...> ha scritto: Following the calibration procedure for my v6, I had trouble zero beating a carrier, so I tried a modified approach that seems to work better for me. With the radio in LSB mode, I tuned 1 kHz above WWV at 5 MHz. WWV's carrier thus creates a 1 kHz tone. I used a program with an audio waterfall (I used FLDIGI) and adjusted the uBITx's tuning calibration until the tone was at 1 kHz. 73, Mark
Gerard All Messages By This Member #83832 Hello, If you inject a signal of 15mhz near the antenna by radiation (Mid 0 to 30MHZ) and watch the beat up to 0 at the oscilloscope just before the SSB filter (or After the 45mhz filter), you must be well calibrated too. I did it like that.?After that, we have to calibrate the BFO. Is that a good method for you? For me, it's work fine cdt
AndyH All Messages By This Member #83838 I like it!? Simpler than the method I've been using! I tune to WWV, then hit the WWV Wikipedia page to see what frequency audio tone is broadcast that minute.? I use the WSJT-X waterfall to track the audio tone. 73, Andy toggle quoted message Show quoted text On Wed, Nov 18, 2020 at 09:12 PM, Mark Erbaugh wrote: Following the calibration procedure for my v6, I had trouble zero beating a carrier, so I tried a modified approach that seems to work better for me. With the radio in LSB mode, I tuned 1 kHz above WWV at 5 MHz. WWV's carrier thus creates a 1 kHz tone. I used a program with an audio waterfall (I used FLDIGI) and adjusted the uBITx's tuning calibration until the tone was at 1 kHz. 73, Mark
Gordon Gibby KX4Z All Messages By This Member #83839 开云体育 I’ve used that method also, that works too. ? It also takes the advantage of taking the measurement down to audio frequencies. ? toggle quoted message Show quoted text On Nov 20, 2020, at 15:23, AndyH <awhecker@...> wrote: ?I like it!? Simpler than the method I've been using! I tune to WWV, then hit the WWV Wikipedia page to see what frequency audio tone is broadcast that minute.? I use the WSJT-X waterfall to track the audio tone. 73, Andy On Wed, Nov 18, 2020 at 09:12 PM, Mark Erbaugh wrote: Following the calibration procedure for my v6, I had trouble zero beating a carrier, so I tried a modified approach that seems to work better for me. With the radio in LSB mode, I tuned 1 kHz above WWV at 5 MHz. WWV's carrier thus creates a 1 kHz tone. I used a program with an audio waterfall (I used FLDIGI) and adjusted the uBITx's tuning calibration until the tone was at 1 kHz. 73, Mark
Mark Erbaugh All Messages By This Member #83843 Yeah, I tried that too, but as you saw, the audio frequency changes from minute to minute. The carrier is constant. It's also stronger. 73, Mark

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