[Lowfer] Medfer Antenna.

[Warren Ziegler]

Hi Peter,

> Given the 1 Watt input level

Actually its 0.1 Watts input (100mW).


-- 
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1



On Tue, Oct 27, 2009 at 5:08 PM, Peter Barick <pbarick at niu.edu> wrote:
> Hi Lee,
>
> The MedFER band is a rarity here on the LowFER List. But some here do more than LFs, though haven't seen their responses, yet.
>
> I understand you wish to BC to the neighborhood only. Shouldn't be too hard. Some answers to your queries:
>
> Part-15 Regs. (as is commonly accepted here) For 1700 KHz band, the 10 foot limit would include the "ground connection" wire, if used. So if ground mounted, the radials or GND rod/s don't count. Further it is thought that a top hat (one or more top radial wires that may be connected, say at their ends) can be thought of as a virtual disk, in a plane at rt. angles to the vertical member. Then that disk has a radius and that counts toward the real antenna length. Most think it wise to have a top hat for ant. efficiency.
>
> Keep the loading coil small. If base mounted can also be used to feed the ant.
>
> It's desirable to keep the freq. generation apparatus indoors and only the final at the ant. to minimize it counting for much in the Part-15 length parameter.
>
> Given the 1 Watt input level, pay attention on system efficiencies, loading, matching, final tuning. You'll need some test equipment for that.
>
> Cheers -- Peter
> --------------------------------
>
>> Need input.  I have a small legal AM transmitter kit I want to put on the
>> hi end of the AM BC band.  I have a lake house in a small subdivision in
>> the country.  the subdivision is a circle you can walk around in a matter
>> of a few minutes.  My house is near the middle of all this.  I want to
>> legally send out AM on the transmitter with subdivision news.  I would
>> suspect the diameter of the circle is around 1200 to 1500 feet.
> <...>
> ______________________________________________________________