operating HF / KX3 in a Tesla Model S
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operating HF / KX3 in a Tesla Model S
 
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Hello elecrafter,
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? 2. The body of Tesla is aluminium alloy (if I am correct. How can I ground a mobile whip to the car body? Any advice is appreciated. 73 Johnny VR2XMC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: operating HF / KX3 in a Tesla Model S
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On 10/19/16 at 9:02 PM, [hidden email] (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 --------------------------------------------------------------------------- Bill Frantz |"We used to quip that "password" is the most common 408-356-8506 | password. Now it's 'password1.' Who said users haven't www.pwpconsult.com | learned anything about security?" -- Bruce Schneier ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
operating HF / KX3 in a Tesla Model S
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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 <[hidden email]> 收件人︰ Johnny Siu <[hidden email]> 副本(CC)︰ Elecraft Reflector <[hidden email]> 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, [hidden email] (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 --------------------------------------------------------------------------- Bill Frantz |"We used to quip that "password" is the most common 408-356-8506 | password. Now it's 'password1.' Who said users haven't www.pwpconsult.com | learned anything about security?" -- Bruce Schneier ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: operating HF / KX3 in a Tesla Model S
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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 <[hidden email]> > 收件人︰ Johnny Siu <[hidden email]> > 副本(CC)︰ Elecraft Reflector <[hidden email]> > 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, [hidden email] (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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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With line conditioner from MFJ one can easily use the receptacle with 100W radio. The conditioner has super capacitors and averages 20-25A peak in the radio to about 7A-10A in the receptacle. Much simpler and cheaper than running dedicated wires.
Ignacy, NO9E |
Re: operating HF / KX3 in a Tesla Model S
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On Wed,10/19/2016 10:46 AM, Ignacy wrote:
> With line conditioner from MFJ one can easily use the receptacle with 100W > radio. The conditioner has super capacitors and averages 20-25A peak in the > radio to about 7A-10A in the receptacle. Much simpler and cheaper than > running dedicated wires. Perhaps for SSB, but maybe not for CW. I like Lyle's idea of an LiFePO4 battery, which could be recharged from the lighter plug with a suitable charge controller. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
operating HF / KX3 in a Tesla Model S
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In reply to this post by Lyle Johnson
Hello Lyle, Jim and Ignacy and others,
Thanks for all your valuable advice. Hong Kong is small and good for Electric Vehicles. The population of EV has increased from 100 to now around 7000 in 5 years time. Regrettably, installation of chargers at condominium car parks is still a uphill battle. In fact, in terms of number of EV per km of roads, Hong Kong is the highest among the Asia Pacific. 73 Johnny VR2XMC 寄件人︰ Lyle Johnson <[hidden email]> 收件人︰ [hidden email] 傳送日期︰ 2016年10月19日 (週三) 11:41 PM 主題︰ Re: [Elecraft] operating HF / KX3 in a Tesla Model S 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 <[hidden email]> > 收件人︰ Johnny Siu <[hidden email]> > 副本(CC)︰ Elecraft Reflector <[hidden email]> > 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, [hidden email] (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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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