"KF6HHS" wrote in message
...
150 mhz = 6.913 db improvement
450 mhz = 7.756 db improvement
Antenna tip 15 feet higher
Now here's my question - will I notice the improvement
enough? I've had several OM's tell me that on SSB, CW
or HF I would but not on 2m/440 simplex and repeaters.
Ken KG0WX
Well, Ken maybe your "OM's" didn't eat their Wheaties. A 6dB improvement
means
you have quadrupled your ERP over your existing system. You have also
increased the distance to your radio horizon with the increse in antenna
height.
Why they would say you won't notice an improvement is beyond me. In plane
language here are a few things just a 6dB improvement mean. You can
reduce
your radios Tx power by a factor of 4 and have the equivalent ERP, 6dB
doubles
your range Tx and Rx (within the limits of your stations LOS - line of
sight).
Stations that were noisy will now be full quieting, be it simplex or
repeaters
you work.
In even simpler terms, "night and day".
What are you waiting for?
Regards, Hugh KF6HHS
Retired, now life moves at my pace.
please note spam filter
Well, I did it. I changed plans at the last second, though,
going for the Hustler CG-144 monobander with radial kit.
Instead of paying $200 for the GP-9, I paid $27 and got
almost as much gain.
After figuring my old antenna's gain - coax - connectors, I
figured the new coax (Flexi 4XL) and antenna. The new
antenna is 5 feet higher and my system gained 3.940 db.
My S-meter on my 2 meter rig is stingy, esp. around S8
where it has an almost logritmic scale action. Still, several
repeaters went from S3 to S5 and several went from S7
to S9. One repeater remained S1 but it's noise factor went
from 50% quieting to 70% quieting.
Turns out it probably was a good decision - the Hustler
has 5.2 dbi gain and the tip is at 42'. I'm just stating to get
intermod at this level of performance (I live between a
hospital & Boeing). I'm convinced if I had gone with the
GP-9, I would have serious intermod problems (plus my
wallet would be $170 lighter) plus raising it would have
been MUCH harder.
Thanks to all who offered advice on this topic - You guys
rule!
73's de Ken KG0WX
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