[TowerTalk] BigIR question

[Ed Richardson]

Jim. The bigIR can be tuned to a quarter wave on all frequencies from 7 to 54 MHZ. On frequencies from 21-54 MHz you can select a 3/4 wavelength mode. 

Vswr graphs will mirror theory and will vary with your ground system.  I have used this antenna with raised radials, tuned stub radials and a ground mounted radial field.    Works well in all cases.  It is still a quarter wave vertical. No magic 

Ed. Ve4ear

Sent from my iPad

> On Dec 5, 2017, at 5:42 AM, Frank VO1HP <invl160 at gmail.com> wrote:
> 
> OK Jim
> 
> ...what is it on 20-10m?   1/4 wavelength on each 20-17-12-10?
> 
> Are there any SWR curves available to see.
> 
> Frank VO1HP
> 
> 73
> Frank VO1HP
> 
> 
>> On Tue, Dec 5, 2017 at 3:31 PM, Jim Rhodes <jimk0xu at gmail.com> wrote:
>> 
>> It is full size on 40, loading coil below that.
>> 
>> Jim Rhodes
>> K0XU
>> 
>> On Dec 5, 2017 8:43 AM, "Frank VO1HP" <invl160 at gmail.com> wrote:
>> 
>> is the Big IR vertical a 1/4 wave vertical on all bands?...or on bands
>> above 40 some other length?
>> 
>> 73
>> Frank VO1HP
>> _______________________________________________
>> 
>> 
>> 
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>> 
>> 
>> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk