Jim, Are you sure it's the controller and not the power supply ("brick")? The original controller had similar reports - usually tracked down to the 33V ("high power") switching supply.
I'd suggest checking with Mike or John Mertel at SteppIR about a replacement power supply. 73, ... Joe, W4TV On 3/9/2011 5:43 PM, Jim Brown wrote: > I've been chasing a very strong, very elusive set of drifting birdies. > They were strongest on 12M, but also were present on 15M and 10M. > Nothing affected them until I unplugged the power supply for the SDA100, > at which time they went away, and the overall noise on the band dropped > by at least 10dB. This crap radiates into every antenna I've got. > > I've managed to attenuate this crap by at least 20 dB using chokes on > the cable that runs to the antenna, the rotor cable, and both the 120VAC > and 33VDC cables from the power supply. > > If you've got an SDA100 (that's the newer, higher voltage controller), > you might want to check this. 15dB is a LOT! The best way to see > what's going on is with a panadapter set pretty wide so that you see > birdies drifting slowly up and down. I'm using a P3. > > 73, Jim K9YC > _______________________________________________ > > > > _______________________________________________ > TowerTalk mailing list > towert...@contesting.com > http://lists.contesting.com/mailman/listinfo/towertalk > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html