Hello Johnny!
You may need some filtering on the 12V power connector in the center
console of the Model S. The 12V battery is also quite small in the
vehicle. I'd be inclined to package an LiFePO4 battery pack and a
charger for it and place it in the center console area, powering the
mobile rig from the LiFePO4 pack. That will give you surge capacity for
higher power should you desire it, probably make any necessary 12V noise
filtering easier and limit the stress on the 12V system in the Model S.
For antenna mounting, you might consider adding a trail hitch adapter,
and then mount the mobile antenna to that, using its bonding to prevent
possible damage or modification to your vehicle. In the U.S., such a
hitch is made by Torklift (www.torkliftcentral.com then click through
Ecohitch and Tesla Model S) and seels for under $400 plus shipping and
installation. It is invisible when not in use. I know a couple of Model
S owners here in Tucson that have these hitches and are satisfied with
their quality and durability.
73,
Lyle KK7P
On 10/19/16 7:45 AM, Johnny Siu via Elecraft wrote:
Thanks Bill. The fuse in the cigarette lighter is 15A. I think only a 50 W
amplifier is workable.
73
Johnny VR2XMC
寄件人︰ Bill Frantz <[email protected]>
收件人︰ Johnny Siu <[email protected]>
副本(CC)︰ Elecraft Reflector <[email protected]>
傳送日期︰ 2016年10月19日 (週三) 10:15 PM
主題︰ Re: [Elecraft] operating HF / KX3 in a Tesla Model S
On 10/19/16 at 9:02 PM, [email protected] (Johnny Siu via
Elecraft) wrote:
I am thinking operating my KX3 in my Tesla and have some questions:
1. Is it ok to direct drain DC supply from the cigarette
lighter socket since there is no ignition system in the Tesla?
You will be drawing less than 4 amps, so the lighter socket
should work fine. If you decide to add the 100W amp, then
running dedicated wires will probably be the correct choice. I
would want to know more about the 12V supply in the Tesla before
running them. Perhaps the car manual has some advice.
2. The body of Tesla is aluminium alloy (if I am correct.
How can I ground a mobile whip to the car body?
Grounding techniques should be the same as for steel. Do be
aware of the corrosion issues when different metals are in
contact. Aluminium corrodes easily, so having a sacrificial
piece of metal to protect the car body may be a good idea.
Perhaps a piece of aluminum bonded to the car body with copper
or brass bonded to it. (My electro-chemistry is a bit rusty.)
Then that piece of aluminum will corrode and can be easily
replaced. Also think about the materials for any screws/bolts
used for the bonding.
73 Bill AE6JV
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