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My 60 series was very quiet but a neighbours 60 series a few years
early had full scale hash on 27MHz from the oil pressure sender. The
engine was alive with noise.<br>
<br>
We bonded the body to the chasis at the front rubber body mounts with
heavy braid and the noise disappeared completely.<br>
<br>
My old 24v 1981 MQ Patrol had S9+ on 2m from the mechanical voltage
regulator. It defied all attempts to quieten it, except one. I built a
solid state regulator and goodbye noise.<br>
<br>
Ray vk2tv<br>
<br>
<br>
On 11/07/10 15:37, Nic McLean wrote:
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<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">I have
found 2 huge sources of noise in landcruisers to be the alternator and
the oil pressure sender. To prove how much of the noise is oil pressure
sender temporarily disconnect the sender. I have knocked down the
alternator whine by fitting a MAR-60A in line. If you fit a 47 nF cap
across the oil pressure sender it will reduce the noise it makes and
will also reduce the oil pressure gauge reading by 10 to 20 % (I can
mentally add the reduction).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Best 73’s<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Nic<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">VK2KXN /
VK5ZAT <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Guys,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">A little OT, but perhaps you
know the answer </span><span style="font-family: Wingdings;"
lang="EN-US">J</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Got my HF setup in the
vehicle installed and operational during the week – IC706 (Original
Mk1) in a 100 Series Diesel Landcruiser (No Turbo).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">All working great, tunes up
on all bands 80m through to 10m with zero noise…… EXCEPT…..<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When the engine is running I
get an awful 1-2kHz squeal in a few spots on 40m (thankfully most of
the 7xx0 and 7xx5 freqs are free from this problem and quite usable).
The problem is also there on 30m and 20m, the noise takes out 10.147
and 14.116 – two freqs I’d like to be able to access – but by far the
worst is on 40m.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I can probably live with it
on 30 and 20m (call into the travelers net whilst pulled over for a
break, and APRS can get away with degraded Rx), but it’s really
annoying when tuning around on 40m whilst mobile.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Anyone with a Diesel
Landcruiser 100 had/solved this issue ??<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Geoff VK2XJG<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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