Oof. Having the attenuator and preamp on at the same time is completely nonsensical. The gain of the preamp is ~11 dB and the loss of the attenuator is ~10dB so they almost completely cancel each other out gainwise. But *all* the noise from the preamp will be added, so your noise floor will be significantly raised and there is *no* advantage gained. The total dynamic range will be reduced by at least the increase in the noise floor (that's assuming that the preamp is completely distortion free).
AB2TC - Knut The Smiths wrote: > > > I find it to be much better in some circumstances. I find that the noise > floor is actually reduced, not brought up by the 2dB that would be > expected. This is very similar to when I adjust the RF Gain down to about > 3 o'clock. Yet it works much faster because I can simply push the button > on and off when I need it. > > <snip> > -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-PRE-ATT-Bug-or-feature-tp5392799p5413907.html Sent from the [K3] mailing list archive at Nabble.com. ______________________________________________________________ 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
