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I ran the numbers and this is the result. All lengths are approximate and are at the centre of the bands except 10m which is at 28.5 MHz.All but the 1/4 wave radiator will require a matching network at the feedpoint which can only be tuned to one band at a time.
ALL vertical radiators will benefit from radials despite the assertion by some that the 1/2 wave does not. The 1/2 wave is not subject to as much ground losses but it does benefit from a decent ground plane.

1/4 wave 1/2 wave    5/8 wave

10m    8'2" 16'4"    20'6"

12m    9'5” 18'4”    23'6”

15m 11'    22' 27'6”

17m 12'11” 25'10” 32'4”

20m 16'6”    33' 41'4”

40m 33' 66' 82'6”

80m 66' 132'    165'

<blockquote data-quote="Captain Kilowatt" data-source="post: 517604" data-attributes="member: 39">I ran the numbers and this is the result. All lengths are approximate and are at the centre of the bands except 10m which is at 28.5 MHz.All but the 1/4 wave radiator will require a matching network at the feedpoint which can only be tuned to one band at a time.&nbsp;ALL vertical radiators will benefit from radials despite the assertion by some that the 1/2 wave does not. The 1/2 wave is not subject to as much ground losses but it does benefit from a decent ground plane.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1/4 wave&nbsp; &nbsp; &nbsp; 1/2 wave&nbsp; &nbsp; &nbsp;&nbsp; 5/8 wave10m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 8&#039;2&quot;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 16&#039;4&quot;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 20&#039;6&quot;12m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 9&#039;5”&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 18&#039;4”&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 23&#039;6”15m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 11&#039;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 22&#039;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 27&#039;6”17m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 12&#039;11”&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 25&#039;10”&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 32&#039;4”20m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 16&#039;6”&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 33&#039;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 41&#039;4”40m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 33&#039;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 66&#039;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 82&#039;6”80m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 66&#039;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 132&#039;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 165&#039;</blockquote>

[QUOTE="Captain Kilowatt, post: 517604, member: 39"] I ran the numbers and this is the result. All lengths are approximate and are at the centre of the bands except 10m which is at 28.5 MHz.All but the 1/4 wave radiator will require a matching network at the feedpoint which can only be tuned to one band at a time. ALL vertical radiators will benefit from radials despite the assertion by some that the 1/2 wave does not. The 1/2 wave is not subject to as much ground losses but it does benefit from a decent ground plane. 1/4 wave 1/2 wave 5/8 wave 10m 8'2" 16'4" 20'6" 12m 9'5” 18'4” 23'6” 15m 11' 22' 27'6” 17m 12'11” 25'10” 32'4” 20m 16'6” 33' 41'4” 40m 33' 66' 82'6” 80m 66' 132' 165' [/QUOTE]

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