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VK2XB > C15 03.03.08 12:07l 94 Lines 3651 Bytes #999 (0) @ WW
BID : 1034_VK2XB
Read: GUEST
Subj: Re:Re: VK2XB on C15's
Path: DB0FHN<DB0MRW<OK0PPL<DB0RES<DK0WUE<7M3TJZ<F6CDD<F6BVP<VK2TV<VK2XB
Sent: 080303/0846Z @:VK2XB.#RIV.NSW.AUS.OC #:1034 [Hay, QF25KL] $:1034_VK2XB
From: VK2XB@VK2XB.#RIV.NSW.AUS.OC
To : C15@WW
VE3WBZ wrote:
>
> Hello Indy, and I believe Roger G0CJM started this topic...
>
Errrrrrrrrrr. No! Wrong! I actually started it, looking for a solution!
Hahahahaha
> Noise Surpression has always been a problem to everyone on
> the road, from the whatever on wheels to the C15s.
I agree as, in the past, I spent about 15 years or more and countless
miles driving my truck on interstate (OTR) with HF on board. However,
those were pre "fly by wire" engines, and had mechanical fuel metering and
no engine management at all. I have also had HF on board Cummins Signature
and ISX motors without problem. C15's are a different kettle of fish.
Cats are just dirty!!!!!!
> I do remember that Antenna Specialists based in Ohio USA,
> also to help in sales of their mobile antennas, brought out
> noise surpressor kits for most vehicles including 18 wheelers.
I may very well have to try and contact this mob. We have isolated the
noise to the actual solonoids or actuators on each and every injector (i.e
INSIDE the rocker covers where there is oil and other lovely stuff) so
suppressing the leads to them, shielding the ECM and the fly by wire from
the isonchronous pedal would be a waste of time.
It would appear that Cat complies with FCC, ACMA and all other radcom
bodies in that the noise doesn't project (theoretically) beyond the
vehicle in which the engine is mounted. Sadly, that is where my radio
will be .... in the SAME blasted vehicle that the engine is
mounted!!!!!!!! There may a solution at hand, though. Read on if
interested!
VK6BE Wrote:
>
> I can run txs on any frequency in my vehicle without any noise from the
> engine or electronics.I have a rear mounted antenna (helical whip) and >the rig is fastened behind
the driver's seat.
> Bob VK6BE
Bob, does your vehicle have a Caterpillar C15? The question was specific
to C15's because they generate humungous amounts of crud! I have a Holden
Rodeo 4X4 turbo diesel utility that is whisper quiet, and that is with the
antenna on the bull bar!! Rear mounting an antenna on the truck may prove
difficult for me because that would be about 19 metres away from the
radio, across an area that is regularly decoupled (unhooked) to do multi
drop deliveries.
Unfortunately, due to the special nature of the vehicle (A Kenworth
T408SAR) and the configuartion it has been manufactured to (quad dog),
there is ONLY one place I can mount the antenna and that is on the bull
bar on the left hand side. This will mean that the co-ax will probably
have to be routed right along the LHS chassis rail where ..... you guessed
it, ALL the Caterpillar electronics are mounted! Joy! Bliss!
It seems that Bill, VK4FW shielded his co-axial cable inside soft copper
tubing, from antenna feed point to the back of the radio and similarly
shielded ALL other lead to the radio (power etc) and reckons it cured it!
I would never have thought it would because my guess would have been that
the antenna would have picked up the noise, but, perhaps the noise WAS
entering the system through the feeder line. I spoke to Bill on the phone
about this matter only last night.
So it seems I will be spending a small fortune on soft copper pipe and
plumbing it along the chassis etc. Sure to be a nightmare! If y'all are
interested, I will keep y'all posted on the operation!!!!!!!!
Kindest Regards
Indy VK2XB
73 - Indy, VK2XB @ VK2XB
Message timed: 19:41 on 2008-Mar-03
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Email Address 1: indy@six.net.au
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