Gilles As you tried to build your own with the info found here? http://www.bavarian-contest-club.de/projects/misc_projects/splitter.pdf <imap://[email protected]:993/fetch%3EUID%3E/Drafts%3E1254?part=1.2&filename=Welcome%20to%20CoPilot%20Live%20navigation%20DACH.txt>
We use them to allow an SDR/K3 combo to share the same antenna. A few pictures the way we make them can be found here: http://www.pi4cc.nl/tech-info/rx-splitter/ Peter PC2A www.pi4cc.nl VE2TZT schreef: > Thanks guys for your direct or via reflector pieces of advise. > > Just a remark : the 25 ohms is correct in the input/serial configuration > suggested by Bryant&Bower in the article I have mentioned previously while > the 100 ohms is the right one in the most common output/parallel > configuration of a splitter. > > On the basis of all that, I am in the process to make some cut and try tests > with different cores and turn numbers using my VNA 2180 . > I am planning to test the two configurations (common and Bryant&Bower ) and > will advise you of my final results. > > More info about the need : I cannot use a commercial splitter because I am > intending to use two of them in a to be constructed switching box (as small > and light as possible) which will dispatch two 75 ohms beverage inputs (JA > and NA/EU directions) to two radios. One radio being for example the 80m > radio and the other the 160m radio. The outputs to the radios must be 50 > ohms because those outputs are going to the radios via W3NQN RX band filters > and we want have the filters at they best in a multitransmitter environment. > In the same spirit, the switching system manages to put a 50 ohms resistor > at the unused output of the splitters. To finish, each operator will have a > remote switch next to his radio to choose its directions. The common mode > rejection at the inputs is just a precaution for expedition places where the > quality of station ground is far from optimal. > > 73, Gilles VE2TZT > > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
