[SCCC] Which station for higher score

[David Hachadorian]

----- Original Message ----- 
From: "JOHN SCHROEDER" <n6qq at msn.com>
To: "sccc" <sccc at contesting.com>
Sent: Wednesday, January 25, 2006 8:36 AM
Subject: [SCCC] Which station for higher score


> Need advice about antennas.
>
> I have two stations that I can use -- for 15 and 20 meters
>
> 1)  KT34A @ 30 feet - with 1500 watt amp.
>
> 2)  4 el SteppeIR at 80 feet -- 100 watts  (at this time - I do not 
> want to run higher power at home QTH)
>
> Which station would give you the highest DX scores ??

The HFTA Program is useful in this analysis.
Assume that the Steppir equals a 4 el yagi
Assume that the KT-34 equals a 3 el yagi
HFTA statistics show that the wave angle to Europe from SOCAL on 14MHz 
is around 8 degrees.
HFTA shows that, with equal power, 4 el at 80' is 9dB louder than 3 el 
at 30' at 8 degrees.
HFTA shows the same 9dB difference on the 15 meter path to Europe (3 
degrees at this part of the solar cycle).
The difference between 100 and 1500 watts is 12 dB, so the KT at 30' 
would be 3 dB louder on transmit into europe.

On receive, the Steppir s/n ratio would be 9dB higher, assuming 
identical noise levels.

Since you can't work 'em if you can't hear 'em, I think you would be 
much better off with the Steppir at 80'.

Dave Hachadorian, K6LL
Yuma, AZ