Many thanks to Anna at Anon-Co who recently shared an interesting “hidden feature” of the Tecsun PL-990 which allows the user to toggle between the internal ferrite antenna and telescoping whip antenna while on either the mediumwave or logwave bands.
1) Turn on the radio and then select either the MW or LW frequency band.
2) Press and hold the [ 3 ] key for about 2 seconds.
When the display shows “CH-5” (actually an “S” which stands for shortwave telescopic antenna) the radio is now set to MW/LW reception using the telescopic whip antenna.
The display will show MW (or LW) and SW on the left side of the screen.
3) Press and hold the [ 3 ] key for about 2 seconds.
When the display shows “CH-A” (“A” stands for “AM”) the radio is now set to MW/LW reception using the internal ferrite antenna once again.
The display will also show only MW (or LW) on the left side of the screen.
Pressing and holding the [ 3] key essentially toggles between these two antenna settings.
I’ve actually found that, indoors, using the whip antenna on mediumwave has been more effective at mitigating RFI with strong local stations. The ferrite bar antenna has more gain, of course, but for locals it’s not necessarily needed.
Many thanks, Anna, for sharing this tip!