QRPGuys K7QO Noise Bridge – $20
We are pleased to offer the K7QO Noise Bridge. It is a compact, self powered, inexpensive device that generates a wide spectrum of white noise up to several hundred MHz. to tune your antenna without activating your transmitter or help align your receiver. It’s very simple to use. Chuck has written a helpful users guide for those not familiar with the noise bridge and it’s applications and uses in the ham shack or electronics bench. All connections are accomplished by the two BNC connectors on the device. It is a through hole kit powered by a long lasting 9 volt battery (not supplied) attached directly to the pcb. On a difficulty scale of 1 to 5, 5 being the most difficult, this is rated at 2.