Exactly what "broadband HF power application" do you have in mind? A
single transformer or balun covering the whole band? Capacitors are
usually avoided in broadband applications. How will you be using them?

Are you a licensed amateur?

Roy Lewallen, W7EL

John Laczik wrote:
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