[TowerTalk] 160 - 80m "T"

[David Gilbert]

I also I got 45 uH if I assumed a 3 inch vertical element ....

73,
Dave   AB7E



Steve Hunt wrote:
> Tim,
>
> Some "rough and ready" EZNEC modelling suggests you need 40-45uH 
> depending on the diameter of the vertical - I assumed the top was #14 
> wire. Rrad is about 19 ohms.
>
> 73,
> Steve G3TXQ
>
> k3hx at juno.com wrote:
>   
>> I wish to put up a top-loaded vertical for 160m (1.83 MHz.)
>>
>> I can go 60 feet up and the top-loading "T" wire can be only 46'
>> long overall.
>>
>> I'd be grateful for suggested values for a loading coil between the top
>> of the vertical element and the middle of the horizontal "T" wire.
>>
>>
>> Once I get the thing to operate properly on 160m, I'd like to use the
>> same antenna on 80m (3.56MHz) and would appreciate suggested circuitry
>> and values.
>>
>> Thanks.
>>
>> 72,
>>
>> Tim 
>>
>> Shameless plug:
>>
>> Michigan QRP Club Sprint
>> 25 May 2009 2300Z - 26 May 2009 0300Z
>> Google: MI-QRP for contest details
>>
>>
>> ____________________________________________________________
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