On Thu, 20 Jan 2005 10:11:38 -0500, Dale Boresz wrote: > Hello Bob, > > I have noticed on my K2, that if I adjust the AGC threshold such that > the background noise level *truly* doesn't change when turning the AGC > on and off, then the RF gain control when turned completely ccw, does > not sufficiently reduce the level of very strong stations. > > I have to adjust the AGC threshold such that there is at least some AGC > action, and then the RF gain control does actually reduce volume level > when turned ccw. > > When trying to copy weak signals, I prefer to operate with the AGC off, > the AF Gain advanced, and I use the RF Gain control to control the > signal level. This seems to give me the best signal-to-noise ratio. So, > in order to have enough range of adjustment with the RF Gain control, I > adjust the AGC threshold until the RF Gain, when adjusted fully ccw, > sufficiently attenuates the largest signals. That seems to be the best > compromise. > > I make no claim that this is the 'correct' way to adjust the AGC > threshold. It's just a method that I've found works best for the way I > prefer to operate. What's nice about the K2, is that we *can* perform > these kinds of optimizations. > > 73, Dale WA8SRA > I find the K2 RF Gain (IF gain) control very ineffective with either the AGC on or off. I tend to use the RF ATT - better from the point of overload, IMD's etc. The RF gain control on my FT1000MP can reduce S9+60 signals to zero.
73 Stewart G3RXQ _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
