Not just "Q-multipliers" but go back another generation to the regenerative receiver (or, more properly put, "regenerative detector"). Same thing. As you narrow the selectivity by adjusting the regeneration closer to the "critical point", the gain also increases, just as with a "Q-multiplier".
I've gotten used to turning up the gain as I narrowed the selectivity on my post-regenerative Homebrew receivers so I didn't miss it on the K3. Ron AC7AC -----Original Message----- I've noticed in homebrew receivers as the bandwidth narrowed, shedding noise and QRM I preferred the gain to go up, increaseing the in-passband signal amplitude. I always attributed it to formative years with a Heathkit Q multiplier. It may be an effect similar to AGC with adjustable flatness (May 1996 analog circuit, in DSP of K3). I found I preferred to have strong signals sound louder rather than perfectly flat. Prolly a psycho-acoustic explanation (or maybe just get my head examined?). In firmware one could increase the audio gain by an adjustable amount as the IF bandwidth was decreased, with an operator-settable scaling number. Say 0 = gain independent of bandwidth, to 100 = gain multiplied by K * (2800/DSP bandwidth). Very similar to the AGC rise scaling. That sounds good to me. ______________________________________________________________ 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
