Friday, November 2, 2018

Ham Radio HF/VHF Antenna Lengths. Post #1666.


Ham Radio HF/VHF Antenna Lengths. Post #1666.

http://www.hamuniverse.com/hamantennalengths.html.

Author:  N4UJW (Hamuniverse.com).

Accessed on 03 November 2018, 0400 UTC, Post #1666.

Please click link or scroll down to read the complete artice.

Comment:  Here's a handy antenna length chart from N4UJW and the staff at Hamuniverse.com.  I copied the chart and placed it above my rig to facilitate HF/VHF antenna design and construction.  The chart covers 1/4 wave verticals, 1/2 wave dipoles, and full-wave loops.  I trust you will find the chart useful as you build new antennas for your station.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Here's the chart:


Ham Radio HF/VHF Antenna Lengths Chart in Feet
Ham Band (Meters)Frequency
(Mhz)
1/4 wave
(Feet)
1/2 wave
Dipole
(Feet
)
1 wave
Loop
(Feet)
1601.800130' 0''260' 0''558' 4''
1.850126' 6''253' 0''543' 3''
1.900123' 2''246' 4''528' 11''
2.000117' 0''234' 0''502' 6''
803.50066' 10''133' 9''287' 2''
3.75062' 5''124' 10''268' 0''
3.90060' 0''120' 0''257' 8''
4.00058' 6''117' 0''251' 3''
60
Under new rules effective March 5, 2012 

The maximum allowed power level WILL BE 100 Watts PEP (ERP) effective radiated power referenced to a dipole. If another type of antenna is used, the station licensee must maintain a record of either the antenna manufacturer?s data on the antenna gain or calculations of the antenna gain.
The frequencies listed here are the ONLY frequencies hams can use with the appropriate license under the new rules.
5.330.543' 9''87' 8''188' 5''
5.346.543' 7''87' 5''188' 0''
NEW 5.357---87' 4"---
5.371.543' 5''87' 1''187' 1''
5.403.543' 3''86' 6''186' 0''
407.00033' 5''66' 10''143' 7''
7.15032' 9''65' 5''140' 7''
7.30032' 1''64' 1''137' 8''
Ham Band (Meters)Frequency
(Mhz)
1/4 wave  (Feet)1/2 wave  Dipole
(Feet
)
1 wave  Loop
(Feet)
3010.10023' 2''46' 4''99' 6''
10.15023' 1''46' 1''99' 0''
2014.00016' 9''33' 5''71' 9''
14.15016' 6''33' 1''71' 0''
14.30016' 4''32' 9''70' 3''
14.35016' 4''32' 7''70' 0''
1718.06812' 11''25' 11''55' 7''
18.16812' 11''25' 9''55' 4''
1521.00011' 2''22' 3''47' 10''
21.20011' 0''22' 1''47' 5''
21.45010' 11''21' 10''46' 10''
1224.8909' 5''18' 10''40' 5''
24.9909' 4''18' 9''40' 3''
1028.0008' 4''16' 9''35' 11''
28.5008' 3''16' 5''35' 3''
29.7007' 11''15' 9''33' 10''
Note: For 28.400Mhz use formulas below 
Ham Band (Meters)Frequency
(Mhz)
1/4 wave (Feet)1/2 wave  Dipole
(Feet
)
1 wave Loop
(Feet)
650.0004' 8''9' 4''21' 1''
54.0004' 4''8' 8''18' 7''
2144.0001' 8''3' 3''7' 0''
148.0001' 7''3' 2''6' 9''
Antenna length is based on the following formulas:
1/2 wave dipole (feet) = 468 / frequency in Mhz. (1/4 wave, use 234 / frequency in Mhz)
Full wave loop (feet) = 1005 / frequency in Mhz
Cut total wire length slightly longer for connecting insulators/pruning as needed for lowest swr.