Friday, Aug 29, 2014 at 21:01
The reputable suppliers most certainly DO measure the whole antenna.
They will as a matter of course " zero out" the feed line.
Oh yess indeed some of the lesser manufacturers work off theoretical figures or figures derived from the antenna they are coppying.
The good on glass...or should I say more correctly.."thru glass" systems are quite efficent...particularly in a certain frequency range.
There may be some loss....but nowhere near "half the power" or 3db.
fair enough there may be loss in the feed line...but there is always loss in a feed line regardles of the aerial in question.
in light 3mm coax like RG174 the losses can be reasonably high ..like 3db in 5 meters.
in the common more or less normal 5mm RG58 the losses are half that about 1.5 DB in 5 meters.
So...if the thru galss system will connect with RG58 in place of the very light stuiff often used it is worth using it if possible.
and within reason keep the cable short.
cheers
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