Hi Pat,
agree with you: is just the matter how is the efficiency of a
radiator.
Today the efficiency of my TX antenna for MF/LF is
0,0000000000000... because I have to fix it so I cannot transmit but I
was anyway faced to antenna gain in the range of -30dBi (1kW in for 1W
radiated) things can also be worse but a transmitting MW with
efficiency in the range of -35dBi could still be worth the bill of the
power company!
73 Marco IK1HSS
----Messaggio originale----
Da: [email protected]
Data: 10-lug-2013 13.20
A: <[email protected]>
Cc: "[email protected]"<[email protected]>
Ogg: Re: R: Re: Fwd: Re: LF: VK1OD's analysis of the MiniWhip
antenna
Hi Marco,
One might argue that anything may be made to radiate if fed with
enough
power. The nature of the "field" so created then becomes the debating
or
debateable point!
Knowledge for its own sake is surely as valid as for any other reason!
It is all philosophy!
73
On 10/07/13 11:57, [email protected] wrote:
> Hornets cannot fly!
> I find interesting and intriguing the discussion: understand how
> things works is of course very important and leave to other to state
if
> this has to come before or after experimentation.
> My first approach to MW was dictated from hirony.. how can such thing
> work? After almost 2 years of use I still have doubts of interactions
> between all the wire on my roof and the MW itself but finally is a
gear
> that makes some work. Under some circumstance better than standard
wire
> antennas, in other cases worse but today almost all my LF/MF
receptions
> are made with a MW.
> The idea that the E probe is similar to a cap plate against the
> universe can explain some aspects if not all.
> What about the same idea applied to a TX antenna? (antennas should be
> reversible items..)
>
> 73 de Marco IK1HSS
>
> ----Messaggio originale----
> Da: [email protected]
> Data: 10-lug-2013 11.51
> A: <[email protected]>
> Cc: "edgar"<[email protected]>
> Ogg: Re: Fwd: Re: LF: VK1OD's analysis of the MiniWhip antenna
>
> I don't know if my previous posts arrived but I still prefer to think
> that a "small" antenna is one plate of a capacitor and the rest of
the
> universe is the other. This then enables the spacecraft antenna to
> work.
> The universe is not a great big empty space!
>
> 73 de Pat
>
>
>
> On 10/07/13 08:58, edgar wrote:
>> I sent this message two days ago and I did not see it arrive.
>>
>> Although the subject is now out of context, I would like some
> comment
>> on my question.
>>
>> Regards, Edgar
>> Moonah, Tasmania.
>>
>>
>> -------- Original Message --------
>> Subject: Re: LF: VK1OD's analysis of the MiniWhip antenna
>> Date: Mon, 08 Jul 2013 00:06:50 +1000
>> From: edgar <[email protected]>
>> To: [email protected]
>>
>>
>>
>> Hi Pieter-Tjerk,
>>
>> If that is the case, and all the parts are at the same potential,
how
>> does a space craft, radio controlled model aeroplane
>>
>> get their signals?
>>
>> Surely every conductor in the unit will have a difference in
> potential
>> due to being in a electromagnetic field.
>>
>> Even in the legs of the FET. Although the potential will be
extremely
> small.
>> Surely it is only necessary to have a change of the Vgs voltage of
> the FET.
>> So the geometry of the antenna has to be made to allow this to
occur.
>>
>> Regards, Edgar
>> Moonah, Tasmania.
>>
>>
>>
>>
>
--
73 de pat g4gvw
es gd dx
qth nr Felixstowe
East Coast UK
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