David, As no one else appears to have replied, I'll take a stab at it. Basically, a "combiner" is a transformerish arrangement which isolates the ports from each other to keep them from interfering while maintaining the correct impedance. They can be pretty simple and inexpensive, with basic versions requiring just a couple of small ferrite cores (of the correct mix for the frequency range involved) with tapped or bifiliar windings and a terminating resistor or so. The following articles explain things far better than I can:
AN10-006 Understanding Power Splitters - Mini Circuits www.minicircuits.com/app/AN10-006.pdf Magic T combiners splitters and how they work - W8JI.com www.w8ji.com/combiner_and_splitters.htm Hope this helps. 73, Al On Sun November 22 2015 8:16:28 am David Christ wrote: > Interesting article, but being a little dense at times, what is inside the > box labeled combiner? > > David K0LUM > > > On Nov 22, 2015, at 6:10 AM, CR <[email protected]> wrote: > > > > If you don't need to probe HV or more than about 1 KOhm, the probes, (or > > indeed, the whole setup) used in Doug Smiths came up with for balanced HF > > probing looks like a good alternative to"what came with" probes. from > > 1994: Balanced Scope Probe Extends High Frequency Measurements, > > http://emcesd.com/pdf/cd94scr.pdf > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
