K3 Noise Blanker

[rfenabled]

Snip

A six cylinder diesel doesn't have ignition noise.  What noise are you
comparing against?  73, Guy.

End Snip

I beg to disagree. The computer controlling many diesel engines today produce noise as do the electronic injectors etc.

Commercial vehicles may use split system style air conditioner's and these do generate noise as well.

As I stated in a previous posting, the TS-480SAT does not do a very good job in my vehicle whereas the K3 handles it very easy.

I have yet to start tracing where the noise is coming from but I will be able to reduce it somewhat when time allows.

73's
Gary
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[Guy, K2AV]

Ignition noise is very specific: cylinder fire timed very short
duration pulse noise with an extremely high peak to average signal
value without a signal frequency center, sometimes adversely affecting
frequencies continuously from below AM broadcast through UHF.  Back in
the day I can remember simultaneously seeing ignition noise from
passing cars on channel 7 TV on the screen, hearing it on AM radio,
and hearing the muffler (or lack thereof) going up the street.

The point is that blanking ignition noise is usually an easy reduction
and has been done easily with technology dating back to the 50's.
Blanking or reducing other kinds of hash, squeaks, snarls, and other
kinds of engine electronic control "leakage" is another can of worms
entirely.

Since the very specific and narrow term "ignition noise" (spark plugs)
was probably not intended in reference to a diesel car, as the heat
from mechanical compression ignites the mixture in a diesel, my
question what WAS the noise at issue?  Though you have listed some
sources below, what is the KIND or SOUND of noise generated by those
devices?

73, Guy.

On Thu, Jan 7, 2010 at 3:50 PM,  <[hidden email]> wrote:

> Snip
>
> A six cylinder diesel doesn't have ignition noise.  What noise are you
> comparing against?  73, Guy.
>
> End Snip
>
> I beg to disagree. The computer controlling many diesel engines today produce noise as do the electronic injectors etc.
>
> Commercial vehicles may use split system style air conditioner's and these do generate noise as well.
>
> As I stated in a previous posting, the TS-480SAT does not do a very good job in my vehicle whereas the K3 handles it very easy.
>
> I have yet to start tracing where the noise is coming from but I will be able to reduce it somewhat when time allows.
>
> 73's
> Gary
> Sent via BlackBerry® from Telstra
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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