On Mon, 22 Mar 2004 12:22:53 +0000 (UTC), "Reg Edwards"
wrote:
What is the matter with the receiver gain control?

Because most are not true gain controls, but instead are squelch level
controls (quite obvious if the S-meter changes with the position of
the so-called RF Gain setting). When doing this kind of hunting by
decimation of signal, it is the interfering signal to co-channel
signal ratio that matters. As you close in on the interfering source,
that ratio changes, but you still need the sensitivity to reckon a
bearing while at the same time attenuating both. In such cases the
front end levels are expendable (through an external attenuator), the
sensitivity is not (through the internal "gain" control).

73's
Richard Clark, KB7QHC