2650 Hz to 4.4 GHz, GPS disciplined, for less than 100 USD

Warren, WA8TOD

I have breadboarded the RFzero together with an ADF4351 evaluation board. For frequencies up to 200 MHz I can use the RFzero directly. From 200 MHz to 4.4 GHz (yes, you read that correctly..... GHz!) the RFzero supplies 25 MHz, GPS-disciplined reference to the ADF4351. Everything in the picture, including the kitchen cutting board base, cost less than $100.