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[aprssig] Re: Help setting up a new TM-D710 for APRS

Greg D. ko6th_greg at hotmail.com
Thu Jan 3 04:47:36 UTC 2008


Just curious, but does this noise radiate beyond the car itself?  I wonder what the global fleet of these things is doing to our noise floor...

Greg  KO6TH


----------------------------------------
> Date: Wed, 2 Jan 2008 13:16:46 -0500
> From: wa8lmf2 at aol.com
> To: aprssig at lists.tapr.org
> Subject: [aprssig] Re: Help setting up a new TM-D710 for APRS
{snip}
> 
> I have listened to it with my Yaesu FT-100 "DC-to-light" transceiver in 
> AM, FM and SSB modes. In all modes, you don't hear any discrete tweets, 
> buzzes, squeals or grinding "hash" - just "hiss" at a slightly higher 
> level than with the antenna input terminated in a dummy load.  In 
> addition, you DO hear an additional pulsing "grinding" noise, on SSB or 
> AM when the regenerative braking system is active, using the wheels to 
> drive the electric motors as a generator.  This noise is barely 
> noticeable on FM where it tends to quiet just like ignition spikes.
> 


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