On Mar 27, 2024, 11:38 AM -0400, Evan Hand <elhandjr@...>, wrote:
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Hello N4GW,
There is no way to return to a previous setting with the stock software.? The other characteristic is that it always starts with a "safe" value for the calibration, NOT the last saved value.? With the stock software, you must write down the value before saving it to the radio.? The way that I recalibrate the frequency is to follow this video:
The BFO Tuning Aid no longer works.? You will need a PC or other audio spectrum analyzer for BFO tuning.? Here are two for PC:
In the US, WWV can be used; however, the 500/600 hertz tones confuse the zero-beat process.? I use a signal generator that I trust to be accurate.
Note that there are three steps or phases in the video:
1 - adjust the BFO so you can hear the low-frequency tones
2 - calibrate the master clock
3 - Readjust the BFO for best speech reception and opposite sideband rejection.
I hope this helps.
73
Evan
AC9TU
