Next message: (no email): "Re: lv-ab: SSB Antenna Installation"
That is correct, the 2" spacers are going to make a small difference but not
worth the effort because if your tuner is doing its job, it will correct for
whatever capacity is introduced. If the insulated wire antenna is taped to
a metal shroud, the shroud will still have to be insulated from ground
otherwise it will ground out the signal in the antenna wire. There is still
a good risk of shock or RF burns from the shroud even though there was no
electrical connection to it - again that capacity virtually connects them
together along the length.
If the shroud is grounded you need to insulate it or find another location
for the antenna wire.
Regards,
Andina Marie Foster,
----- Original Message -----
From: "Jerry Peters" <>
To: <>
Sent: Thursday, August 05, 2004 8:01 AM
Subject: lv-ab: SSB Installation
> I have been researching SSB installation issues and am left with a couple
of
> questions.
>
> First, antenna installation. I intent to use a long wire through a tuner
to
> operate on HF. I intend to use an insulated shroud (I have a cat with no
> backstay) with a short feed from the tuner. I have always believed that
the
> feed wire should be separated from the rigging before it reaches the
> connection point to reduce capacitive reactance. I have accomplished this
> in the past with 2" spacers holding the wire off of the shroud until it
> reached the connection point. Recently, I read a credible opinion that
> separation of an inch or two is irrelevant at high frequencies because to
> eliminate all capacitive reactance the separation would have to be meters.
> The capacitive reactance that does exist can be accommodated with the
tuner.
> If this is true I would prefer to directly attach a long insulated wire to
> the shroud - perhaps tape it over a 25 foot length. It would be out of
the
> way, safe from rf burn risk and would not require the installation of
> rigging isolators which introduce mechanical weakness and expense.
>
> My second set of questions relate to ground plane/counterpoise
installation
> but I'll hold of on those questions for the moment.
>
> Thanks for your help.
>
>
>
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