[RFI] Car laptop adaptors

[Martin Ewing - AA6E]

Using raw auto power seems a little risky to me - if you don't want to
fry your laptop when running the starter motor or getting a jump
start...  OTOH, that's what we do with our ham gear.

73 Martin AA6E

Mel Crichton wrote:
> I can tell you one to avoid: the universal adapter with numerous plugs, the one I bought off Internet is Espow brand... about 20-25 bucks on E-Bay... RFI even with ignition off. I tried the small TrippLite inverter and managed to get it failrly quiet, but its noise increased ith ignition on.
> 
> NN9K tells me that the really expensive one (about 150 bucks) made by Lind Electronics is quiet, but I chose to buy a "12 volt" laptop instead. 
> 
> Just for fun, did you try your laptop on a 12 volt DC supply? Many WILL work, even though the battery and AC supply are over 14 volts. I soldered a cigarette lighter plug in parallel with the 19volt DC from the AC supply, for a temporary fix. Will have a dedicated 12 volt AROUND the ignition switch in the future.
> 
> Mel KJ9C