[Lowfer] Antenna design idea question

[Michael Lodico]

Hi Paul,

I would go that route but I don't have the trees or structures to 
support it.

73,
Mike
K1EG

Paul Daulton wrote:
> I have done this with 1/4 wave on 160 meters with an 18 foot cane pole. But I think the coil will be too lossy at 185khz. A 30 ft verticle wire and 20ft dia top hat seems to be the best, that would require a loading coil of apx 2500uh. Loading coil should have l/d ratio of 2/1. A five gal bucket is good form for coil. 
>
> Calculate the inductance of the coil you propose, figure about 5pf /ft of capacity for the verticle then calculate the resonance, it will require much less than1/2 wave of wire. My verticle has something like
> 350pf capacity measured to ground, my loading coil trimmed out to less than what I calculated for resonance. The difference is the inductance of the tower( even a straight wire has inductance) one has to consider this in series with the loading coil and in parallel to the capacitance to ground for the numbers to match. 
>
> Paul k5wms
>
> Quoting Michael Lodico <k1eg at matrix-computers.com>:
>   
>> Good morning all you Lowfer's out there. 
>>
>> I am trying to plan for an antenna for this winter and came up with an
>> idea based upon what a ham did for a shortened 80 meter vertical.  The
>> plan is as follows:  you take a 1/2 wavelength of wire and wind it on a
>> rod like a solenoid so that it is shortened considerably.  He claims
>> that it performs quite well. 
>>
>> What I have in mind is to take 4 lengths of PVC heavy wall pipe, 4", 3",
>> 2" and 1 1/2", and wind a 1/2 wavelength of wire over the 40' length.  I
>> would do this in 10' lengths and dope the windings in place to hold them
>> and then connect them together at each joint.  At the top I would add a
>> 10' diameter capacitor hat.  By using the different diameters this gives
>> me  anchor points for  Dacron guys. 
>>
>> My question is has anybody tried this?  Is it a feasible design idea
>> worth pursuing?  Any comments or feedback would be greatly appreciated. 
>>
>> 73,
>> Mike
>> K1EG
>> ______________________________________________________________
>>
>>     
>
> Paul Daulton K5WMS
> beacon WMS 187.492 khz qrss30/slow 24/7
> Jacksonville,Ar 72076
> em34wu
> ______________________________________________________________
>
>
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