Good morning,

EI9GQ gave you an excellent suggestion :

Have you got a HF rig? A lot of homebrewers use 10m-2M
transverters. I use my homebrew HF rig to drive a homebrew
transverter and 4CX250B linear.

perhaps some idea/help there :

http://www.df9ic.de/tech/trxtest/trxtest.html
http://www.sm5bsz.com/dynrange/vhf2004/vhf2004.htm

http://members.fortunecity.com/xe1bef/transverters.htm

http://lea.hamradio.si/~s53ww/4xbf998/4xbf998.htm
http://lea.hamradio.si/%7Es53ww/xvrt/xvrt.htm

http://perso.wanadoo.fr/f1bzg/trvt/trvt144pdf.zip
http://perso.wanadoo.fr/f1bzg/trvt/trvt5028.zip
(un-zip, then it's a pdf)

Good luck !
Francis, F6AWN