Tecsun S-8800 Hidden Feature: Frequency display calibration

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.

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2 thoughts on “Tecsun S-8800 Hidden Feature: Frequency display calibration

  1. 13dka

    Nice find, Dan! However it’s hard to tell what this number really represents or what oscillator it tunes – at any rate the number does not represent kHz and Hz. It looks like the last digit changes the frequency in 2.5Hz steps (so 4 steps per 10Hz in-/decrement). The other calibration method known from the PL-880 also works on the S-8800, and while it’s just as unclear what oscillator that one tunes, there’s some indication that it tunes the BFO, so this one might be tuning the VFO.

    At any rate, everyone wanting to play with this should jot down the number that shows up first, as this is obviously individual for each example of the 8800 and once you turned the dial, the radio doesn’t want a confirmation of the change and might keep the new value even when you reset the firmware.

  2. DanH

    So, the S-8800 may be tuned to plus or minus 50 Hz when using the fudge factor, which isn’t shown on the frequency display?


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