[R-390] More R648

[Richard Green]

another R648 s/n 926 here at the K7YOO qth. It joins the 390A, 1247, and 391 in the pile.If there is a good source for a decent Tech Manual for the R648  I would be interested.Technically the R648 has several "features" that are somewhat annoying: filter selection tied to the mode, and no convenient separation of the AF and RF gain control. It would be interesting to hear the rationale behind these "features". Skip