Thread: 91XG or DB8e
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Old 11-Aug-2017, 11:54 PM   #19
Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,483
Originally Posted by ADTech View Post
There's a reference circuit design in this MiniCircuits app note that is pretty much similar to almost every two port splitter I've opened. Ignore the "external" references in the diagram, those are for the design engineer's use who is using the device for his design. In the collection of splitters I have on hand and have opened, I see one or more differences in capacitors as well as some splitters that don't' bother with the isolation network between the two outputs (two coils and resistor).
Thanks for the splitter information; very helpful.

Originally Posted by welkin View Post
Also, I think I know the answer, but is there a method of combining the 4 antennas that doesn't introduce the loss of a splitter/combiner?
As you are finding out, it is not easily done. You first must try your antennas without combining to see if reception is possible. Then, when you combine them, if you are not able to receive all the channels that you had when the antennas were separate, combining doesn't work for you.

There seems to be a difference of opinion between ADTech and Tower Guy about the potential success of combining 4 antennas in this manner. With so many factors involved, I would just have to try it.
Multiple tuners are not an option.
Why not?
If you can not measure it, you can not improve it.
Lord Kelvin, 1883

Last edited by rabbit73; 12-Aug-2017 at 12:12 AM.
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