Frank Mikkelsen wrote:

I whant to double a frq. between 200 and 265 MHz. I had tryed to used the
Mini-circuits RK2 doubler and som BP filters, but because of the band pass
200-265MHz it is diffeculd for me to suppress the input frq. and the 3*inp.
to min 50-60dB.
Is there any other ideas to realise this.

--
Frank Mikkelsen

University of Aarhus
Institute of Physics & Astronomi
Nymunkegade, Bygn. 520, room 432
DK-8000 AArhus C
Denmark

Phone +45 89423799 or +45 89423795
Fax: +45 89423794

Another approach is to lock an oscillator running at the output
frequency to the input. Try dividing the oscillator by two and use that signal
to compare to the input.

Bill K7NOM