[CQ-Contest] Plesant change / multiple antennas
w8ji at w8ji.com
Sat Oct 22 14:33:08 PDT 2011
> have problems with this. The thing is I have two different beams (A4S
> and TH 5 ) on seperate towers.
> Up to this point I can feed the TH5 at 75 feet alone or the th5
> and A4S (at 35 ft ) together.
> Not the A4S alone yet. With both beams swr goes up a bit but rigs
> antenna tuner takes care
> of it. I am thinking I can live with this ?
It's better to either match things closely and tune a marginal amp properly,
or seriously over-couple the amp to reduce efficiency and use a much larger
amp than required (then you have one power knob to adjust). Otherwise you
would be adjusting the radio or amp all of the time, or splattering
To maintain impedance when paralleling systems, it would be better to use a
good stacking box to run multiple antennas. Remember, legal output power is
actually forward power MINUS reflected power. It is never forward power
alone unless reflected is zero.
Doing something marginal, that makes others suffer or is rough on our gear,
is always easy and cheap.
:-) Using your tuner is fine though, if you really want to retune every time
you flip the dual antenna or single antenna switch.
More information about the CQ-Contest