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Re: [RFI] Car laptop adaptors

To: <Mike@rfiservices.com>, "'RFI Reflector'" <rfi@contesting.com>
Subject: Re: [RFI] Car laptop adaptors
From: "Jim P" <jvpoll@dallas.net>
Date: Mon, 12 Nov 2007 12:37:35 -0600
List-post: <mailto:rfi@contesting.com>
Mike, that's all well and fine, and many of us have had
similar lash-ups with gear designed to be driven from
such 12V sources ... I remember one such lash-up
we had back 'in the days' on board a turbo-prop
powered 'flying platform' where 'operating' motors
during the climb-out phase (pulling back in the Fowler
flaps) FUBAR'd a rack full of equipment's power
supplies the first time out (transients on the DC or AC
aircraft power bus that no one saw coming!)

I personally blew an LM555 in a smallish DC/AC
inverter back in the late '70's b/c of insufficeint
'buffering' on the 12V input line ... a re-engineered
+12V source to the LM555 (small series R and a
big C to local LM555 gnd) and no trouble since.

JimP // WB5WPA //

----- Original Message -----
From: "RFI Services" <Mike@rfiservices.com>
To: "'RFI Reflector'" <rfi@contesting.com>
Sent: Monday, November 12, 2007 11:47 AM
Subject: Re: [RFI] Car laptop adaptors

> Hey guys,
> I have several commercial and Amateur radios, 2 laptops, a mobile data
> computer w/900meg radio, IFR Spectrum Analyzer, O Scopes, RF FS meter and
> several other devices. All connected 24/7 with no surge protection and all
> fused at the source. I use an F-250 diesel that is really demanding during
> the start mode. The only issue I've had in 28years is the IFR locks up
> I start the truck and I have to shut it down and restart it. This is
> by the low voltage during start up. I've verified this.
> My point is, other than some yoyo every now and then jump starting my
> using an arc welder, I've never had an issue.
> Michael C Martin
> RFI Services
> 6469 Old Solomons Island RD
> Tracys Landing, MD 20779
> 240-508-3760
> mike@rfiservices.com
> www.rfiservices.com

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