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VK2XB > C15 06.03.08 17:27l 62 Lines 2627 Bytes #999 (0) @ WW
BID : 1204_VK2XB
Read: GUEST
Subj: Re: VE3WBZ > The Bobmobile
Path: DB0FHN<DB0MRW<DB0ERF<DB0FBB<DB0IUZ<DB0OVN<DB0GOS<ON0AR<HS1LMV<HS3LIQ<
VK2DOT<VK2TV<VK2XB
Sent: 080306/1505Z @:VK2XB.#RIV.NSW.AUS.OC #:1204 [Hay, QF25KL] $:1204_VK2XB
From: VK2XB@VK2XB.#RIV.NSW.AUS.OC
To : C15@WW
VK2XB comments on the following:-
> There's good reason why truckers mount the antennas on the mirrors,
> fiberglass cab bodies and then there's that pesky air dam that often
> curves back over the entire roof.
There's a REAL good reason why this particular antenna ain't gonna go on a
mirror! I work (mostly) in the "outback" (or at least what most people
seem to define the "outback" to be) and do about 50% running on amongst
the worst corrigated roads, possibly most of you could imagine. Vibration
is a killer of antennae, so the stick going on this is the most robust I
can source. It is being custom made for me by a manufacturer well versed
in creating hardy mobile whips for this particular environment.
Incidentally, this is ALSO why I have not even considered a "screwdriver"
style antenna (although both the Codan and another brand had some appeal -
just not the price of them!!!)
Thus the prospective antenna weighs in at a huge amount, because it is
built like the proverbial schnitzenkrugen housen. Additionally, it is
STRONG. If it was on a mirror and I collected a tree with the antenna
(quite a real possibility), chances are the antenna would survive but the
mirror (at around $150 a pop) wouldn't!!!! Hence the "bullbar" solution
mentioned in an earlier post!
> The best suppression for whine
> I've ever used is an active filter used in the B+ lead of those "boom
> amps" that drive you nuts passing by. Hey, boom boxes in the trunk are
> good for one thing, structural integrety testing of body welds. Anyway
> those filters average a 30A capacity so they're ideal for putting in the
> B+ lead to the average 100W ham rig.
The intended (already purchased) radio will draw about 40 Amps. However,
most Delco/Remy (not sure of the spelling) alternators I have encountered
in this country are not bad with regard to noise they ....... emit!
> As for those black box engine controls, that's a bit beyond my ken but I
> believe auto manufacturers have retro kits for them.
Bill tells me that Cat pretended to not understand and/or believe him
(even after a demo) and claimed that the motor's RF emissions were within
tolerances so, basically, tough errrrrr titties!
> I'm just thankful I never had anything but an alternator whine
> that I soon fixed in the VXAmobile, Toyota believes in KISS.
Only problem, Warren, is that I am not sure your Toyota would be too happy
dragging around about 240,000 Lbs or thereabouts!!!!!!!!!
73 - Indy, VK2XB @ VK2XB
Message timed: 01:26 on 2008-Mar-07
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