14-02-2016, 01:30 PM
(14-02-2016, 09:15 AM)Murphyv310 Wrote: Regarding your signal loss over a long length of coax, the effects of 50 or 75 ohm coax will be more noticeable at the terminating end of it, I think you do need to make a simple RF step up transformer.
I will second that.
Gary, for the answer to your question as to why so much signal is lost in the unmatched cable, look up a data sheet for RG59 (or whatever cable you are using) and find the capacitance per metre.
Now calculate how much capacity there is across your unmatched feeder!
I am reminded of a club who wanted a second extension microphone cable for their PA. Someone found a reel of unwanted coax and used that.
Very little above about 200Hz came out of the other end! It was, of course, a high impedance microphone ...
