[Elecraft] noise on SSB modulation

[David Gilbert]

I honestly don't know, since I think it would depend on how 
conscientious the laptop manufacturer was handling ground issues.  There 
may not be any assurance that signal grounds are common with things like 
the switching power supply ground, etc.

I would think that it's worth a try, though.

73,
Dave  AB7E


On 9/24/2011 9:34 AM, alan geller wrote:
> Dave,
> If one is using a laptop, can a screw post from an unused multi-pin 
> style connector be an effective ground connection?
>
> Alan/K6ADG
>
> Date: Fri, 23 Sep 2011 09:08:26 -0700
> From: David Gilbert <xdavid at cis-broadband.com 
> <mailto:xdavid at cis-broadband.com>>
> Subject: Re: [Elecraft] noise on SSB modulation
> To: dk5ew at mmmonvhf.de <mailto:dk5ew at mmmonvhf.de>
> Cc: elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net>
> Message-ID: <4E7CAEFA.1060605 at cis-broadband.com 
> <mailto:4E7CAEFA.1060605 at cis-broadband.com>>
> Content-Type: text/plain; charset=ISO-8859-15; format=flowed
>
>
> If you are using any kind of rig control with your computer (and
> therefore have a shield connection between the K3 and the computer, such
> as via an RS-232 cable), make sure the chassis of your K3 is securely
> bonded to the chassis of the computer with a very short length of large
> gauge wire or section of shielded braid.  I had to go down to less than
> a foot of RG-8 shielded braid to eliminate all hum on my signal.
>
> 73,
> Dave  AB7E