Which types of ferrite toroids and capacitors would be recommended
for an antenna tuner that is to be used 1.5 MHz - 30 MHz (possibly
up to 50 MHz)? Max. transmit power is 100 ~ 150 W.

Ideally I would prefer components that are available from either
RS (rswww.com) or Farnell (uk.farnell.com).

Farnell do toroids from N27, N30, 3C85, 3R1, 4C65, 3E5 and 3E25
materials; which ones are suitable for broadband HF power applications?

For the capacitors, would any of the surface mount types be suitable?

Thanks,

John