We present a PLL stabilized VCO at X-Band frequencies extended by a frequency multiplier-by-eight module forming a variable LO source for E-Band communication systems with enough output power to drive an E-Band mixer without additional post amplification. The module shows a 3-dB output bandwidth from 73 to 85 GHz with a saturated output power of 10 dBm. Together with the VCO module the source features a phase noise of -89 dBc/Hz at 100 kHz offset from the 76.8 GHz carrier.