[TowerTalk] Fwd: Change in Frequency As Antenna Height

[Jim Thomson]

Date: Thu, 2 Jun 2016 17:51:07 +0100
From: Steve Hunt <steve at karinya.net>
To: towertalk at contesting.com

Here are the resonant frequencies I measured of a 10m half-wave dipole 
on a telescopic push-up mast at various heights above ground in my back 
yard:

5ft    29.359MHz
10ft   30.499MHz
15ft   30.889MHz
20ft   30.407MHz
25ft   30.179MHz

Steve G3TXQ

##  scale that up to 40m... then it becomes  a 205 khz  increase when going from
20 ft..to  100 ft.   But I dont know if scaling or extrapolating the 10M data is valid. 

Jim  VE7RF.