I'm not sure I understand the following AGC versus RF Gain position behavior. It may be the way it should work but it seems strange to me.
In a nutshell, the change in output audio voltage level, as measured by the AFV and dBV measurement capability, is not what I expected for different RF gain positions. When the RF Gain control is fully clockwise (maximum), audio voltages measured when AGC-F is on and AGC off are shown in Figure 1. (See https://sites.google.com/a/ke7x.com/www/home/miscellaneous-k3-informatio n/unexpected-agc-behavior for figures.) Turning the AGC off results in higher (louder) audio signal levels. What I expected. When the RF Gain is reduced to about the 1 o'clock position (first dot after 12 o'clock), turning AGC off results in lower (weaker) audio signal levels until you get to about -50 dBm input signal level as shown in Figure 2. Not what I expected. In addition to this behavior, when turning the RF Gain through the 9 o'clock position there is a definite 10 dB change in audio level. Fred Cady KE7X "The Elecraft K3: Design, Configuration, and Operation." www.ke7x.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
