[Elecraft] OT: QST's review of the Yaesu FTDX5000MP

[ab2tc]

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.