Field Tuning the Smiley 270A telescoping dual/tri band antenna
Channel: Mountain Parameters
Date: 2020-01-25

How to frequency match a metal telescoping antenna to get an optimal SWR ratio in the field by expanding or collapsing sections.

Optimal antenna lengths for stated frequencies:
Collapse 3 tops/2 bottoms Tuning to get best SWR for 150MHz
Collapse 4 tops/2 bottoms Tuning to get best SWR for 155MHz
Collapse all, then pull tip up Tuning to get best SWR for 160MHz
Collapse all, then pull tip up half way only  Tuning to get best SWR for 165MHz
Entirely collapsed: Tuning to get best SWR for 170MHz or 175, and 465MHz

Timeline:
00:00  Introduction, what is the Smiley 270A telescoping antenna?
1:45 Refresher on why SWR is important to your antenna choices
02:00 Begin SWR tests: starting point: fully collapsed
02:30 Why you want SWR of '2' or better.
02:50 SWR of '3' explained
04:20 The story of the Rocket Scientist that told me Standing Wave was a myth.
05:20 Tuning to get best SWR for 150MHz
06:00 Tuning to get best SWR for 155MHz
06:35 Tuning to get best SWR for 160MHz
07:00  Tuning to get best SWR for 165MHz
07:40 Tuning to get best SWR for 170MHz
08:00 Tuning to get best SWR for 175MHz
08:45 The effect of counterpoise on SWR for VHF and UHF
09:30 The best tuning lengths for FRS band 
10:00 Which is best UHF or VHF counterpoise?