[OZAPRS] Need a hand - mobile antenna

[Matthew Cook]

The base should have a wire that electrically shorts the spring, otherwise
bad things happen to your tuning point as the antenna moves.

73

Matthew
VK5ZM

On 9 December 2017 at 15:03, <vk4tec at tech-software.net> wrote:

> Does a spring base affect the length ?
>
>
>
> Andrew
>
>
>
> *From:* OZAPRS [mailto:ozaprs-bounces at aprs.net.au] *On Behalf Of *Bob
> VK6KW
> *Sent:* Saturday, 9 December 2017 1:37 PM
> *To:* 'Australian APRS Users' <ozaprs at aprs.net.au>
> *Subject:* Re: [OZAPRS] Need a hand - mobile antenna
>
>
>
> Hi Folks,
>
> One day I’ll actually get to ‘play radios’ again and be able to join you
> on air; but in the meantime have to console myself with reading the mail
> and storing up the good ideas; however in earlier times as Net control for
> the 14.116 Traveller’s Net, and even travelling o’seas (VK7 & ZL) I found
> the centre loaded Hustler system to work well on my 80 Series (bull bar)
> and borrowed/hire cars (tow bar). Simple, convenient, effective – and no I
> don’t own any shares.
>
> Main components are HD spring loaded base, a common folding articulated
> ‘mast’ section  (1/4 wave on 6m) onto which fits coil loaded ‘resonator’
> for whichever band – available for 80m – 10m including WARC.
>
> My subjective observations were that it out performed the Codan 9350+ 1.8m
> SS whip on any given band.
>
>
>
> I presume they are still available – have not had to look as I have
> several sets including the suitcase-ready one. Just don’t try taking it
> onto a cruise liner or they will lock it in the hold!!! Rotten spoil sports!
>
> 73,
>
> Bob VK6KW
>
>
>
> *From:* OZAPRS [mailto:ozaprs-bounces at aprs.net.au
> <ozaprs-bounces at aprs.net.au>] *On Behalf Of *vk2tv
> *Sent:* Saturday, December 09, 2017 5:08 AM
> *To:* ozaprs at aprs.net.au
> *Subject:* Re: [OZAPRS] Need a hand
>
>
>
> The more I look at the vehicle, the more I read and the more I hear, the
> less I want to install something I'll hardly use!
>
> I did consider a nudge bar but not at $800.
>
> I'll build up a tilt-over mast for at home and populate it before I spend
> too much time on the X-Trail.
>
> Ray vk2tv
>
>
>
> On 08/12/17 20:40, Liz wrote:
>
> QTR Mon, 4 Dec 2017 09:19:27 +1100 vk2tv QTC
>
>
>
> I've just looked at my X-Trail and I think I've lost any enthusiasm I
>
> had for installing radios, hi. I think the engine block was poured in
>
> situ!
>
>
>
> The main frame of the vehicle - subframe, floor pan, roof, firewall
>
> and door frames - seems to be a welded mass of metal to which
>
> mudguards, bonnet, doors, etc are bolted, so any bolts attaching
>
> components to the sub-frame could be a possibility. A "Z" bracket
>
> coming out from under the bonnet could possibly utilise one of the
>
> mudguard mounting bolts. A magbase on the edge of the bonnet could be
>
> earthed via a short lead to a mudguard mount or the bonnet hinge
>
> mount. Most bonnets are not purposely earthed so heavy(ish) straps
>
> (RG213 braid, e.g.) around the hinges could be beneficial. A couple
>
> of possibilities there, but this is just one specific vehicle.
>
>
>
> My days of crawling over and under vehicles to install radios ended a
>
> long time ago; these days I'm the wrong shape for crawling under, and
>
> multi-focal spectacles don't work well upside down under a dash.
>
>
>
> Ray
>
>
>
> vk2tv
>
>
>
> I've got a 32 series Xtrail.
>
> You forgot to mention the 8cm of insulating foam as well....
>
> My OM took out the passenger seat and got a base plate fitted to the
>
> base of the seat, on which the radios sit, with one head on the dash
>
> and the other on a stalk attached to the passenger seat bolt.
>
> Antenna for 2m is in the middle of the roof and HF antenna on the
>
> bullbar. As indicated previously, motorising the antenna support cost
>
> about $45K.
>
>
>
>
>
>
>
> -+-+-+-+-+-+-+-+-+-+-+
>
> Liz
>
> VK2XSE
>
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>
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