Joe, the 0.1 Hz spaced sidebands were probably not caused by the TX, but related to the RX noise blanker being periodically triggered by DCF39 bursts. They were probably just being smeared out when t
Hi Joe & Joe, these are two separate effects: The 0.1 Hz sidebands on strong amateur signals are created by DCF39's telegrams, periodically activating the noiseblanker every 10 seconds. They may incr
Last night (Feb 3/4) Joe's TX signal was perfectly stable again. But not on my grabber - unfortunately my receiver had been around 20 mHz low and drifting, caused by a loose solder joint on the BNC p