Many thanks to SWLing Post contributor, Dan Robinson, who shares the following procedure for calibrating the Tecsun S-8800. Dan received this procedure from Anna at Anon-Co:
Apparently there is a “hidden function” through which you can manually calibrate the SSB frequency display. Please follow the below calibration steps to see if it helps:
1) Turn on the device and set it to USB/LSB.
2) Now press & hold the “AM NORM.” button until you see the backlight blink twice (takes about 2 seconds).
3) Now press & hold the “MEMORY” button, until a certain value is shown on the display, for instance “6829”. This example value refers to a frequency like “xxx68.29 kHz”.
4) If you noticed a frequency deviation of 0.05 kHz up/down earlier, then you can use the main tuning knob to do the calibration. In the above-mentioned example, you would turn the main tuning knob to adjust the value to “6824” or “6834”.
Wow! Thanks for sharing this Dan! That’s two posts about S-8800 hidden features in one day. A record for sure! Readers: please comment if you know of other hidden features. I’m compiling a full list.