Hmm, item 4 about the synth not going above 33MHz does not make any sense. With a 1st IF of 73MHz for the up-conversion path, the LO would have to be 103MHz just to reach 30MHz and 127MHz to get to 54MHz.
AB2TC - Knut Joe Subich, W4TV-4 wrote: > > >>> That makes absolutely no sense to me. Can you or anyone else here >>> well versed in radio design please explain to me why the Kenwood >>> engineers would do this? > > The best guess is that Kenwood did not want to invest in 1) the high > performance front end (bandpass) filters for the non-amateur bands, > 2) quality 6 KHz and 15 KHz (low frequency) IF filters, 3) give up > coverage +/- 500 KHz of the "first" IF, and 4) their unlocked DDS > synthesizer would not work above 33 MHZ (limiting down conversion > to a maximum frequency of 22 MHz). > > Very bad design with slick marketing. > > 73, > > ... Joe, W4TV > > <snip> > -- View this message in context: http://elecraft.365791.n2.nabble.com/OT-QST-s-review-of-the-Yaesu-FTDX5000MP-tp5738046p5741904.html Sent from the [HAM] 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
