As a happy owner of MTR3b, I have found out that my unit sends perhaps around 100kHz lower than the display or sound indicate. I mean that if I am at 7.030 MHz, reversebeacon.net would rather show I am 7.029.900. It is similar on 10 and 14 MHz. (see screenshot below)
I found out in the manual that it is possible to calibrate this with an oscilloscope, but I do not have that equipment - is this possible to do this just without by pressing the arrow twice during the procedure based on the average readings of reversebeacon.net?
Has anyone tried to calibrate the frequency in MTR3b? I don’t want to spoil anything, it would be disappointing to spoil it instead of fixing. At worst case, I can stay with it and keep adding 100kHz each time I tune in the desired frequency.