Re: Stone Soup
On Wed, 5 Sep 2018 16:04:14 +0200
"Henning Weddig via Groups.Io" <firstname.lastname@example.org> wrote:
Lev,Yes... yes. Basically, I want to have a cheap radio, that have a reasonable good receiver, and its transmitter meets the FCC and European standards. I want to use the RIG mainly on digital modes, like PSK. It should be open source, and designed by KiCAD.
So some yo Your ideas stated below can be used as a first spec. I wantSo the diplexers are there to load the mixers equally at all frequencies? Why not then just load it with a resistor, and insert a follower? Sorry my RF knowledge ends here.
For the frist mixer: the configurattion should look like this:What do we gain by the hybrids? Sorry, I don't want to challenge you, I just simply want to understand your motivations.
Then a first bidi amp (low noise would preferrable) but our normal bidisYes. I think this is the point where everybody agrees. We shell dump the 2N3904s. However, I'm thinking about not having bi directional amplifiers. What if we create separate TX and RX circuit? All we loose is two mixers and the XTAL filter. Also, why the transmitter shall be double conversion?
In order to avoid the still existing problem of the spur genratoedCould you write the exact device you ordered?
So please have a look on my block diagrammes and total noise calc.That's good. I only have Oscilloscope. So may I ask you to publish your test results if you have the thing up and running?
Thank you very much for your thoughts.
73s de HA5OGL
Senior Electronic Engineer