Gerry Hull

No Jerry, I would connect the dongle to the 1st I-F at 45 MHz.  That way, you keep the display centered as you tune, plus you get the front end selectivity and sensitivity.

73 Gerry W1VE

On Sat, Apr 21, 2018, 1:11 PM Jerry Gaffke via Groups.Io <> wrote:
Thanks for the info!
Sounds like the  "Experimental: HF Direct Sampling Mode" to receive frequencies 
from 500khz to 28.8mhz  is not quite ready for prime time.
Or at least, not for punters like me.
Good to know.

Jerry, KE7ER

On Sat, Apr 21, 2018 at 09:20 am, Doug W wrote:
I have the same dongle and am happy with it.  You can order it on Amazon for the same price with prime shipping to boot.  I did experiment with direct sampling but in the end broke down and bought an upconverter and later the enclosure.  It is not lost on me that all of that costs about the same as a BITX40 and by the time you throw in random connectors and what not about the same as a µBITX.  I have not tried connecting it to a Pi but using an otg adapter I have used it with an old android phone.  I haven't used it on the phone in a while but I seem to remember using the free version of SDR Touch.  Prior to having a real antenna I was using this balun and random wire with limited success and a few cheap telescoping whip antennas.
I just did a quick search and as usual Adafruit has a solid tutorial on with links to libraries
For general ideas and knowledge you can't beat

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