I used a 4 or 5 foot extension intended for a GPS Antenna which ends up with
with
a window sucker plugged in to Icom one end and the Icom Antenna plugged in
the window sucker end. Works perfectly used as stand by com.
Dave
Sent from my iPhone
> On 30 May 2014, at 18:47, "Frans Veldman" <frans@privatepilots.nl> wrote:
>
>
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>> On 05/30/2014 05:06 PM, David Joyce wrote:
>>
>> I would be grateful if one of you experts in radio matters could
>> tell me whether one can add a couple of metres of good quality coax
>> cable to distance the stub antenna of a hand held Icom transceiver
>> from the radio, positioning the stub aerial on top of the fuselage
>> behind the pilot, without mucking up its function.
>
> Yes you can do that, provided you create some artificial ground at the
> antenna connector (unless the airplane is made of metal). On the
> radio, the radio itself plus the person holding the radio are some
> kind of ground, but if you relocate the antenna you need something
> below the antenna to take over that function. (If you don't, the outer
> shield of the coax will take over that function, but this is probably
> not what you want).
> Note that the stub antenna of the hand held radio has less performance
> than a full quarter wave antenna. (Inside this stub antenna you will
> find a coil; it is still a quarter wave antenna but most of the length
> has been coiled up and doesn't radiate as much anymore.)
>
> Frans
>
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