On 11/5/2019 3:40 PM, wb6ogd wrote:
My NC-40 (homebrew copy) tunes 7014-7066.? Below that they go too fast for me, above that is only
the digital modes and the novice band.
What is wrong with the old novice band?? I frequently listen there.
NC-40 filter is too narrow for SSB (though I have listened to
some canadians and you can mostly understand them but with very bad quality).? Why would you
want more than that?
Because it is there...errr because I can.
There was some comment that a DDS vfo has a pretty low upper frequency but the AD985x series are good to at least 30.0mhz.
The NC40 VFO runs in the 2 mhz range and the Si5351 and the AD985x would loaf along at those frequencies.? VK5TM had some pretty good circuits on his web pages.? As I recall, he even had the PIC code. That code could be modified to set the band range to match your rig.
My pet project is a DDS (or PLL) vfo for the HW8.? My HW8-Franken vfo would run between 8.4 and 8.9mhz.? Have you seen anyone else do that to an HW8?? My plan is to use one of the ebay 6 digit counters and measure the frequency directly so no IF offset needed and would be undesirable anyway since circuits do drift and it would be easier to measure the frequency than to predict the drift!
Thank you.
Jim Pruitt
WA7DUY
