[amsat-bb] Re: Mobile Computer / Radio Installations
n3tl at bellsouth.net
Wed Apr 29 13:25:17 PDT 2009
This is definitely one of the areas I need to investigate further in light of multiple requests to expand my original post and submit it to the Journal for possible publication.
There are a couple of other areas I need to do more work on, too.
-------------- Original message from Clint Bradford <clintbrad4d at earthlink.net>: --------------
> >> ... Most cigarette lighters circuits have a 15 to 20 amp fuse on
> them. That ought to work fine for charging/using with your computer ...
> That amount of current can/will destroy sensitive electronic devices.
> (20A??? That's more than what an Icom IC-706MKIIG uses at 100W TX
> power ... )
> Personally, I would never run my laptop off a vehicle's charging
> system while the vehicle is running. You won't find many reputable
> laptop manufacturers recommending this.
> And all power feeds to my radio gear are properly conditioned and
> If I needed to run my laptop for extended periods on a 12VDC system, I
> would use nothing less than a ...
> Tripp Lite PVINT375
> (although this model comes with a cigarette lighter plug, that
> connection has to be one of the electrically most UNreliable for what
> we are doing - so the plug gets whacked off and the unit is wired
> directly) ... or
> Astron Pi-250W
> 12VDC-to-120VAC inverter made for such circumstances. Wire it in to
> your vehicle's 12VDC system, and simply use your existing AC power
> supply. Immediate benefit is the ability to power/ charge other
> electronic items you may have using regular AC chargers.
> There's no need to know the voltage/current/connectors of the laptop.
> The laptop's manufacturer already did all that work for you when they
> supplied the AC adapter.
> Another downfall of using the cig lighter circuit for comms: very
> rarely is that line filtered for noise and such. I mean, who needs
> that line filtered to heat up a cig lighter? More intelligent cars do
> have filtered/conditioned "power ports." But I do not leave anything
> to chance, and make sure my equipment is properly protected.
> Then there are folks who run their 100W HF rigs through a cig lighter
> plug and swear that all's well with the world ...
> And so it goes.
> Clint Bradford, K6LCS
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB