How do i save talksport radio station on my Roberts Gemini 45 RDS radio ?....(no manual)

SOURCE: How do I preset / save radio stations on the Irock 860?

After you have tuned to the radio station you want press and hold the A-B button you should see "Saved" on the display. :-)

SOURCE: Will not tune to a station

take your radio to a w/shop
the tuner is not working, when you select search a small voltage is sent to atuner, this changes a tuner variation.
plse do that

SOURCE: changed battery on roberts r871 radio .time date needs to be set

hold down mode button until display flashes, change time with up/down buttons. Press mode button once to change to date use up/down to move through dates, the time display will show year you are in the further you press the up button the further in the future you will scroll. This radio holds date & day information depending on the year displayed. Leave flashing to time out after adjusting.

SOURCE: Preset Radio Statios

I just dug out the manual and have now programmed a preset.

Instructions:
1) Make sure there are a pair of working AA batteries behind the second (inside) compartment door as these power the memory (mine were Duracells with an expiry of 2001 and had worked all the way through to 2010 before finally failing!)
2) Find the frequency you want with the Up/Down button
3) Press the M button - you will get a flashing M on screen
4) While the M is flashing, press one of the numbered preset buttons.

SOURCE: Right clock time

Hold the memory button on the remote control, wait for the written "SYNC ON" on display and then press the track forward (one on the right with the double arrow).

Now normally set the clock.