Valpey Fisher master oscillator in the center - on the left one of the Analog Devices DDS-chips (AD9851A). This oscillator has the lowest phase noise available at the moment (typ. -130dBc at 100Hz from carrier). Unfortunately Valpey Fisher asked minimum order value of 1000$ as the oscillator is made on request and individually tuned on the desired frequency. We placed a group order with a couple of hamradio friends - thanks to a great world-wide community of Hamradio RF-specialists!