Re: [Elecraft] KPA500 mobile?
As Phil knows, it is commonly used on ships in the US Navy for the same reason. Many US Navy ships have an on-board cellular system but it's useless without a way to get RF into all the compartments and passageways through steel plate! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Kane Sent: Saturday, April 15, 2017 3:25 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 mobile? On 4/15/2017 7:43 AM, Phil Hystad wrote: > Unfortunately, I can’t remember anything of the details of how this > was done but I suspect wide-band amplifiers and wires and top-side > wide-band antennas. Leaky coax (trade name == Radiax). It's many-decades-old technology. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
The very best station on Sirius/XM really destroys the beautiful melodious sounds and overtones coming from the banjo. It gives it a watery metal sound. However that does not stop me from listening to it. It is really all about the content. That's why I can enjoy bluegrass on my iphone or XM radio. Nothing coming close to listening live music when you are surrounded by other pickers. So you do not have to bother with finding the perfect speaker or stereo. They can never reproduce what you hear live. Same thing with radio. It is all about the content. This is one reason we enjoy CW so much. The tone sounds like you are in presence of the sending cw operator coming out of our receivers. It only has to reproduce one tone, it's fairly narrow and it sounds live. Jim K9YC I am sure you have good term for this. I don't know what the phenomena is called. Maybe if the speaker was shaped like a banjo that would be a good place to start to reproduce its sound however, then you need another one shaped like a dobro and so on. Not really practical. 73, Dan KM6CQ *Don't sacrifice your hobby for the right house.* I occasionally car pool to ham events with a neighbor in his high end VW. He bought the satellite service, and we sometimes listen to it. It drops out with foliage and under overpasses. Sound quality is so bad that it's hard to listen to any form of acoustic music. Perhaps too much data compression, made worse by any problems with the signal path. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Touche! :) __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 4/15/2017 7:24 PM, Bob Nielsen wrote: > Waveguide below cutoff. > > On 4/15/17 10:54 AM, Clay Autery wrote: >> The ultimate directional, high-pass filter... >> >> __ >> Clay Autery, KY5G >> MONTAC Enterprises >> (318) 518-1389 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Waveguide below cutoff. On 4/15/17 10:54 AM, Clay Autery wrote: The ultimate directional, high-pass filter... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 4/15/2017 10:14 AM, Jim Stahl via Elecraft wrote: OTOH, this can be a feature of tunnels, not a bug. Several years ago I was riding on the “BikePike”, an abandoned section of the PA Turnpike east of Breezewood that has become a bicycle route featuring two old tunnels. Although closed off to motor vehicle traffic, we noticed a pickup parked outside the entrance to one of the tunnels. A few hundred yards into the tunnel we encountered a minivan with lots of high end electronic test equipment. Turns out the guys were doing tests on some military equipment, to determine that it was RF quiet to prevent detection by enemy forces. We didn’t ask a lot more, lest they would have had to shoot us :-) 73 - Jim K8MR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@n7xy.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile? -- OT tunnel communications
On 4/15/2017 8:45 AM, Phil Hystad wrote: > And, cellular service will be ultimately in all of the tunnels under > Seattle and already exists in the oldest downtown tunnel as described > here: "All it takes is money" (my favorite phrase) Now if they were to fund ham-band repeaters - that would be something! 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
On 4/15/2017 7:43 AM, Phil Hystad wrote: > Unfortunately, I can’t remember anything of the details of how this > was done but I suspect wide-band amplifiers and wires and top-side > wide-band antennas. Leaky coax (trade name == Radiax). It's many-decades-old technology. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
The ultimate directional, high-pass filter... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 4/15/2017 10:14 AM, Jim Stahl via Elecraft wrote: > OTOH, this can be a feature of tunnels, not a bug. Several years ago I was > riding on the “BikePike”, an abandoned section of the PA Turnpike east of > Breezewood that has become a bicycle route featuring two old tunnels. > Although closed off to motor vehicle traffic, we noticed a pickup parked > outside the entrance to one of the tunnels. A few hundred yards into the > tunnel we encountered a minivan with lots of high end electronic test > equipment. Turns out the guys were doing tests on some military equipment, to > determine that it was RF quiet to prevent detection by enemy forces. We > didn’t ask a lot more, lest they would have had to shoot us :-) > > > 73 - Jim K8MR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Hate to hear that... Wife loves it. (2014 Fusion). I'm mostly happy with it, too. Though I prefer to just play what I want from my phone (high bit-rate mp3). Of course, neither of us are audiophiles, and I flew helicopters... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 4/14/2017 11:41 PM, Jim Brown wrote: > On Fri,4/14/2017 9:06 PM, Matt Zilmer wrote: >> I used Sirius in the early 2000s, and used to experience regular >> dropouts of 4 seconds in several locations on my commuteto/from >> work. Each of these areas was under a highway or freeway. > > I occasionally car pool to ham events with a neighbor in his high end > VW. He bought the satellite service, and we sometimes listen to it. It > drops out with foliage and under overpasses. Sound quality is so bad > that it's hard to listen to any form of acoustic music. Perhaps too > much data compression, made worse by any problems with the signal path. > > 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile? -- OT tunnel communications
I found one link that describes basically this service for AM/FM radio reception in the I-90 tunnels. It is section 7.3 (right near the end) of this link: http://www.wsdot.wa.gov/sites/default/files/2012/06/26/I-90TunnelSystem.pdf And, cellular service will be ultimately in all of the tunnels under Seattle and already exists in the oldest downtown tunnel as described here: http://www.seattletimes.com/seattle-news/transportation/seattle-transit-tunnels-will-finally-get-cellphone-signals/ 73, phil, K7PEH > On Apr 15, 2017, at 8:14 AM, Jim Stahl wrote: > > OTOH, this can be a feature of tunnels, not a bug. Several years ago I was > riding on the “BikePike”, an abandoned section of the PA Turnpike east of > Breezewood that has become a bicycle route featuring two old tunnels. > Although closed off to motor vehicle traffic, we noticed a pickup parked > outside the entrance to one of the tunnels. A few hundred yards into the > tunnel we encountered a minivan with lots of high end electronic test > equipment. Turns out the guys were doing tests on some military equipment, to > determine that it was RF quiet to prevent detection by enemy forces. We > didn’t ask a lot more, lest they would have had to shoot us :-) > > > 73 - Jim K8MR > > >> On Apr 15, 2017, at 10:43 AM, Phil Hystad wrote: >> >> A number of tunnels are “wired” for broadband radio reception. A bit of >> years ago when they were building the I-90 stretch between Bellevue and >> Seattle there are two major “tunnels” on each side of the I-90 floating >> bridge (across Lake Washington). The tunnel on Mercer Island is actually >> not a tunnel but a covered section of the freeway but the tunnel on the west >> end is through the hill (known as the Mount Baker tunnel but not because it >> is under Mount Baker but because it is under the Mount Baker neighborhood of >> Seattle). >> >> So, a news article at the time described how the technology was employed to >> provide radio reception for AM, FM, and also cellular communication. I >> don’t remember reading about Sirius/XM radio though. I do know that my HF >> mobile operations come to a halt through those tunnels. As signals drop off >> after a 100 feet or so from the opening and don’t come back until the other >> side. >> >> Unfortunately, I can’t remember anything of the details of how this was done >> but I suspect wide-band amplifiers and wires and top-side wide-band antennas. >> >> 73, phil, K7PEH >> >> >>> On Apr 14, 2017, at 8:47 PM, Fred Jensen wrote: >>> >>> Semi-related curiosity regarding shielding. My wife's car has Sirius/XM >>> radio. It usually loses contact with the satellite driving under >>> Interstate bridges and the like. Likewise in the garage. OTOH, at our >>> previous home there was a tunnel through a small hill, perhaps 1/4 mi long. >>> The XM worked fine through it. There are a pair of tunnels at Cave Rock >>> next to Lake Tahoe through a granite mountain. XM works fine through them >>> too. Anyone know why? >>> >>> 73, >>> >>> Fred ("Skip") K6DGW >>> Sparks NV USA >>> Washoe County DM09dn > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
OTOH, this can be a feature of tunnels, not a bug. Several years ago I was riding on the “BikePike”, an abandoned section of the PA Turnpike east of Breezewood that has become a bicycle route featuring two old tunnels. Although closed off to motor vehicle traffic, we noticed a pickup parked outside the entrance to one of the tunnels. A few hundred yards into the tunnel we encountered a minivan with lots of high end electronic test equipment. Turns out the guys were doing tests on some military equipment, to determine that it was RF quiet to prevent detection by enemy forces. We didn’t ask a lot more, lest they would have had to shoot us :-) 73 - Jim K8MR > On Apr 15, 2017, at 10:43 AM, Phil Hystad wrote: > > A number of tunnels are “wired” for broadband radio reception. A bit of > years ago when they were building the I-90 stretch between Bellevue and > Seattle there are two major “tunnels” on each side of the I-90 floating > bridge (across Lake Washington). The tunnel on Mercer Island is actually not > a tunnel but a covered section of the freeway but the tunnel on the west end > is through the hill (known as the Mount Baker tunnel but not because it is > under Mount Baker but because it is under the Mount Baker neighborhood of > Seattle). > > So, a news article at the time described how the technology was employed to > provide radio reception for AM, FM, and also cellular communication. I don’t > remember reading about Sirius/XM radio though. I do know that my HF mobile > operations come to a halt through those tunnels. As signals drop off after a > 100 feet or so from the opening and don’t come back until the other side. > > Unfortunately, I can’t remember anything of the details of how this was done > but I suspect wide-band amplifiers and wires and top-side wide-band antennas. > > 73, phil, K7PEH > > >> On Apr 14, 2017, at 8:47 PM, Fred Jensen wrote: >> >> Semi-related curiosity regarding shielding. My wife's car has Sirius/XM >> radio. It usually loses contact with the satellite driving under Interstate >> bridges and the like. Likewise in the garage. OTOH, at our previous home >> there was a tunnel through a small hill, perhaps 1/4 mi long. The XM worked >> fine through it. There are a pair of tunnels at Cave Rock next to Lake Tahoe >> through a granite mountain. XM works fine through them too. Anyone know >> why? >> >> 73, >> >> Fred ("Skip") K6DGW >> Sparks NV USA >> Washoe County DM09dn __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
A number of tunnels are “wired” for broadband radio reception. A bit of years ago when they were building the I-90 stretch between Bellevue and Seattle there are two major “tunnels” on each side of the I-90 floating bridge (across Lake Washington). The tunnel on Mercer Island is actually not a tunnel but a covered section of the freeway but the tunnel on the west end is through the hill (known as the Mount Baker tunnel but not because it is under Mount Baker but because it is under the Mount Baker neighborhood of Seattle). So, a news article at the time described how the technology was employed to provide radio reception for AM, FM, and also cellular communication. I don’t remember reading about Sirius/XM radio though. I do know that my HF mobile operations come to a halt through those tunnels. As signals drop off after a 100 feet or so from the opening and don’t come back until the other side. Unfortunately, I can’t remember anything of the details of how this was done but I suspect wide-band amplifiers and wires and top-side wide-band antennas. 73, phil, K7PEH > On Apr 14, 2017, at 8:47 PM, Fred Jensen wrote: > > Semi-related curiosity regarding shielding. My wife's car has Sirius/XM > radio. It usually loses contact with the satellite driving under Interstate > bridges and the like. Likewise in the garage. OTOH, at our previous home > there was a tunnel through a small hill, perhaps 1/4 mi long. The XM worked > fine through it. There are a pair of tunnels at Cave Rock next to Lake Tahoe > through a granite mountain. XM works fine through them too. Anyone know why? > > 73, > > Fred ("Skip") K6DGW > Sparks NV USA > Washoe County DM09dn > > On 4/14/2017 2:50 PM, Phil Kane wrote: >> On 4/14/2017 1:13 PM, KENT TRIMBLE wrote: >> >>> The assumption has always been that the driver and passengers are riding >>> inside a Faraday Cage and therefore are safe from RF radiated by an HF >>> antenna, regardless of where located and regardless of power level. >> When I take my 2011 Ford Focus through the car wash, I put the mag-mount >> VHF antenna inside the car but it is still connected to the radio. I >> have no problem picking up the usual 2- and 3/4- meter repeaters that >> way. So much for the "Faraday Cage". :) >> >> 73 de K2ASP - Phil Kane >> Elecraft K2/100 s/n 5402 >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to phys...@mac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Shameless Promotion but interesting story: Two years ago in the Florida QSO Party, our local "Mad Scientist" and mobile operations God Chris, NX4N, decided to do something that had never been done before: A Multi Multi mobile entry! In his Chevy Suburban, we had four radios: A K3 in the front seat (K0LUZ), a Pro2 (W4BP) and a K3 in the second row (K4KM) and me with a K3 in the third row. 20m, 40m, 15m and 10m in that order. Chris did all the driving. It was an all CW operation. Lots of filtering and coax stubs installed. Four separate antennas on the corners of the roof. Four separate computers. The KX3 was feeding a KPA500 in the back of the Suburban which turned it into a 100w radio. Power supplies and other sundries were installed in a bread rack in the back and secured by Bungie cords. Feeding power to all of this was a Honda 2kW generator with an external fuel tank mounted on a carrier attached to the trailer hitch. The generator was covered by a plastic tub held on to the hitch carrier with Bungie cords. This cover was for rain abatement. The cover was adorned with special vents on the side. Yes, crazy and a gray area of mobile legality, But all of us survived to tell the tale. And it was Great fun! And I remember working OM2VL at almost every single county line. It's the only time I have seen a KPA500 mobile. I have since bowed out of this glorious extreme mobile engineering achievement. But it continues with others to this day. And it will be on this coming weekend in the Florida QSO Party's 20th anniversary celebration. The call sign used by this intrepid crew is K4OJ (in honor of FCG Founder Jim White (SK)). Look for them this coming weekend! Lu - W4LT (W4I in the FQP - Spell "F-L-O-R-I-D-A S-U-N" with our 20 "letter multiplier" stations -2 for each letter - for a special certificate!) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
On Fri,4/14/2017 9:06 PM, Matt Zilmer wrote: I used Sirius in the early 2000s, and used to experience regular dropouts of 4 seconds in several locations on my commuteto/from work. Each of these areas was under a highway or freeway. I occasionally car pool to ham events with a neighbor in his high end VW. He bought the satellite service, and we sometimes listen to it. It drops out with foliage and under overpasses. Sound quality is so bad that it's hard to listen to any form of acoustic music. Perhaps too much data compression, made worse by any problems with the signal path. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Sirius (at least) has terrestrial transmitters that are used to full sat voids, like tunnels or parts of the San Francisco or NY financial districts, or tall mountains near an interstate highway. The smaller blockages are probably deemed a minor inconvenience, especially if they're out inthe countrysideor in unpopulated areas. I used Sirius in the early 2000s, and used to experience regular dropouts of 4 seconds in several locations on my commuteto/from work. Each of these areas was under a highway or freeway. Not sure if your tunnel was private or not. If it was, it wasn't covered by surface transmitters unless by accident. There is a tunnel in LA that basically runs under LAX, and I never lost signal there. It's probably hit or miss on what's covered terrestrially. XM (I believe) bought Sirius out, sometime in the last decade. Both services operate on the abandoned telco S-bandif I understand correctly. I hear XM isn't doing so well financially, but that was probably a couple of years ago. May not be current on this. 73, matt W6NIA On 4/14/2017 8:47 PM, Fred Jensen wrote: Semi-related curiosity regarding shielding. My wife's car has Sirius/XM radio. It usually loses contact with the satellite driving under Interstate bridges and the like. Likewise in the garage. OTOH, at our previous home there was a tunnel through a small hill, perhaps 1/4 mi long. The XM worked fine through it. There are a pair of tunnels at Cave Rock next to Lake Tahoe through a granite mountain. XM works fine through them too. Anyone know why? 73, Fred ("Skip") K6DGW Sparks NV USA Washoe County DM09dn On 4/14/2017 2:50 PM, Phil Kane wrote: On 4/14/2017 1:13 PM, KENT TRIMBLE wrote: The assumption has always been that the driver and passengers are riding inside a Faraday Cage and therefore are safe from RF radiated by an HF antenna, regardless of where located and regardless of power level. When I take my 2011 Ford Focus through the car wash, I put the mag-mount VHF antenna inside the car but it is still connected to the radio. I have no problem picking up the usual 2- and 3/4- meter repeaters that way. So much for the "Faraday Cage". :) 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to mzil...@roadrunner.com -- "A delay is better than a disaster." -- unknonwn Matt Zilmer, W6NIA [Shiraz] __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Semi-related curiosity regarding shielding. My wife's car has Sirius/XM radio. It usually loses contact with the satellite driving under Interstate bridges and the like. Likewise in the garage. OTOH, at our previous home there was a tunnel through a small hill, perhaps 1/4 mi long. The XM worked fine through it. There are a pair of tunnels at Cave Rock next to Lake Tahoe through a granite mountain. XM works fine through them too. Anyone know why? 73, Fred ("Skip") K6DGW Sparks NV USA Washoe County DM09dn On 4/14/2017 2:50 PM, Phil Kane wrote: On 4/14/2017 1:13 PM, KENT TRIMBLE wrote: The assumption has always been that the driver and passengers are riding inside a Faraday Cage and therefore are safe from RF radiated by an HF antenna, regardless of where located and regardless of power level. When I take my 2011 Ford Focus through the car wash, I put the mag-mount VHF antenna inside the car but it is still connected to the radio. I have no problem picking up the usual 2- and 3/4- meter repeaters that way. So much for the "Faraday Cage". :) 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Easy to try. I live a half mile from the main Google self-driving car site. We see them every day. I can’t offer 220V service, but bring your KP500 over and we can wait for a Waymo car to get in range. Actually, need to wait until I get the HF antenna back up. The walnut tree that held up one end died (sad times), so I’m working on the mast for an inverted vee along the fence line. Unless you want to test with a Hustler super resonator. Go for it. wunder Walter Underwood wun...@wunderwood.org http://observer.wunderwood.org/ (my blog) > On Apr 14, 2017, at 6:20 PM, Mike Flowers wrote: > > I wonder what would happen if a mobile KW station keyed up beside one of > these experimental driverless cars? > > And I wonder how well the electronics in these cars are protected from RFI? > > -- Mike Flowers, K6MKF, NCDXC - "It's about DX!" > >> On Apr 14, 2017, at 12:12 PM, Fred Jensen wrote: >> >> I had a 100W HF mobile in a Ford Ranger in early 2001. Transmitting would >> disable the cruise control if it was on. I gave the truck to #1 grandson >> when I bought a 2003 Silverado [he promptly rolled the Ranger [:-(( ]. >> >> The computer that operated the driver's seat exceeded the capacity/speed of >> the computer that got us to the moon by an order of magnitude or more and it >> was one of a dozen or so in the truck. I put a 25 watt UHF FM rig in it, and >> the first time I transmitted, the seat computer lost its mind and pinned me >> to the steering wheel. $380 later, that was fixed and I resorted to an HT >> in the truck. >> >> I wouldn't put 500 watts in today's vehicles. >> >> 73, >> >> Fred ("Skip") K6DGW >> Sparks NV USA >> Washoe County DM09dn >> >> >> >>> On 4/14/2017 11:58 AM, brian wrote: >>> In the old days, cars didn't have computers. Getting away with running a >>> KW worked. Today may be different. >>> >>> Nobody seems to be concerned about crashing/killing the computer(s) running >>> the whole car. Could lead to a really dangerous situation. >>> >>> Don't know what the replacement cost for the motherboard/peripherials of a >>> car computer system is. My guess: big bucks. >>> >>> What current experience is there out there? >>> >>> 73 de Brian/K3KO >>> >>> >>> >>> >>>> On 4/14/2017 16:45 PM, Bert Craig wrote: >>>> Yaesu FT-891 w/ >>>> HLA 305V @ approx. 200 W. >>>> http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus >>>> >>>> Vy 73 de Bert >>>> WA2SI >>>> >>>> Sent from my android device. >>>> >>>> -Original Message- >>>> From: Mike Smith VE9AA >>>> To: Elecraft@mailman.qth.net >>>> Sent: Fri, 14 Apr 2017 12:00 >>>> Subject: [Elecraft] KPA500 mobile? >>>> >>>> Big fan of mobile ham radio here...Have always run 100w. >>>> >>>> Would like to do more. (500w-1000w) >>>> >>>> >>>> >>>> Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to >>>> generate 15a @ 115ac?) >>>> >>>> >>>> >>>> Related question...if you haven't run a KPA500 mobile, what amp HAVE you >>>> run >>>> mobile? >>>> >>>> >>>> >>>> Thanks >>>> >>>> >>>> >>>> Mike VE9AA...VE9AA/m >>>> >>>> >>>> >>>> Mike, Coreen & Corey >>>> >>>> Keswick Ridge, NB >>>> >>>> >>>> >>>> __ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:Elecraft@mailman.qth.net >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>>> Message delivered to wa...@arrl.net >>>> __ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post
Re: [Elecraft] KPA500 mobile?
I wonder what would happen if a mobile KW station keyed up beside one of these experimental driverless cars? And I wonder how well the electronics in these cars are protected from RFI? -- Mike Flowers, K6MKF, NCDXC - "It's about DX!" > On Apr 14, 2017, at 12:12 PM, Fred Jensen wrote: > > I had a 100W HF mobile in a Ford Ranger in early 2001. Transmitting would > disable the cruise control if it was on. I gave the truck to #1 grandson > when I bought a 2003 Silverado [he promptly rolled the Ranger [:-(( ]. > > The computer that operated the driver's seat exceeded the capacity/speed of > the computer that got us to the moon by an order of magnitude or more and it > was one of a dozen or so in the truck. I put a 25 watt UHF FM rig in it, and > the first time I transmitted, the seat computer lost its mind and pinned me > to the steering wheel. $380 later, that was fixed and I resorted to an HT in > the truck. > > I wouldn't put 500 watts in today's vehicles. > > 73, > > Fred ("Skip") K6DGW > Sparks NV USA > Washoe County DM09dn > > > >> On 4/14/2017 11:58 AM, brian wrote: >> In the old days, cars didn't have computers. Getting away with running a KW >> worked. Today may be different. >> >> Nobody seems to be concerned about crashing/killing the computer(s) running >> the whole car. Could lead to a really dangerous situation. >> >> Don't know what the replacement cost for the motherboard/peripherials of a >> car computer system is. My guess: big bucks. >> >> What current experience is there out there? >> >> 73 de Brian/K3KO >> >> >> >> >>> On 4/14/2017 16:45 PM, Bert Craig wrote: >>> Yaesu FT-891 w/ >>> HLA 305V @ approx. 200 W. >>> http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus >>> >>> Vy 73 de Bert >>> WA2SI >>> >>> Sent from my android device. >>> >>> -Original Message- >>> From: Mike Smith VE9AA >>> To: Elecraft@mailman.qth.net >>> Sent: Fri, 14 Apr 2017 12:00 >>> Subject: [Elecraft] KPA500 mobile? >>> >>> Big fan of mobile ham radio here...Have always run 100w. >>> >>> Would like to do more. (500w-1000w) >>> >>> >>> >>> Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to >>> generate 15a @ 115ac?) >>> >>> >>> >>> Related question...if you haven't run a KPA500 mobile, what amp HAVE you run >>> mobile? >>> >>> >>> >>> Thanks >>> >>> >>> >>> Mike VE9AA...VE9AA/m >>> >>> >>> >>> Mike, Coreen & Corey >>> >>> Keswick Ridge, NB >>> >>> >>> >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to wa...@arrl.net >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to als...@comcast.net >>> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to k6...@foothill.net >> >> --- >> This email has been checked for viruses by AVG. >> http://www.avg.com >> >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to mike.flow...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
I suspect that the dwell time would be small enough for most folks you crossed paths with that you'd probably be safe (need to do the math anyway). For cars going the same direction as you, you as the control operator, have to make sure you don't irradiate anyone else around you beyond the limits Besides installation accommodations, you can control exposure by manually maintaining a sufficient "bubble" around you during transmission (extended transmission... whatever the math tells you. I don't have a feel for where we are generally "safe" mobile... For myself, I would have to do an actual test as installed and measure/observe and plot. Another excellent question of course you should ask. Not a trivial engineering task IF you want to do it correctly. :) __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 4/14/2017 2:39 PM, Lynn W. Taylor, WB6UUT wrote: > I wonder if the exposure to passing cars is below the limit with a > Hustler or similar antenna on the rear bumper? > > Are we good at 100w, 1000w? > > Should I have not asked this question? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
I am reminded of when I (actually my employer and you taxpayers) bought a shielded room to enclose "my" RF laboratory. This was modular, 16' x 20' x 10' and composed of 2" thick particle board, clad on both sides with tin-plated sheet steel. Because I needed to be able to move a rack mounted test position with a table top in and out, I specified a four-foot wide door. The door was constructed similarly with a brass frame around the door and was prehung in a brass jam and massive hinges. It was installed using a forklift to position it while the fasteners were tightened. The jam had a continuous channel around the periphery that housed a double row of beryllium-copper finger stock backed up by conductive foam. The door frame had a brass "knife-edge" around the periphery that drove into and was pinched by the finger stock in the jam. On of the specs that I remember was 120 dB of isolation at 10 Ghz. We measured this by setting up a source with a horn antenna on a tripod outside the room with another horn and LNA into a spectrum analyzer inside the room. We normalized the path with the door open and the horns aligned and then closed the door and measured the difference. It made 120 dB, but just barely; this is not a trivial achievement. To drive home the necessity of maintenance, the vendor engineer said, "Watch this." He took a dollar bill out of his wallet and laid it across the finger stock and then closed the door. I don't remember the exact number but it was yuge; the attenuation went down 30 or 40 dB just from breaking the connection of the knife edge with the finger stock over the width of a dollar bill. (For what this room cost, he should have been using a c-note.) Wes N7WS On 4/14/2017 1:33 PM, Jim Brown wrote: On Fri,4/14/2017 1:13 PM, KENT TRIMBLE wrote: The assumption has always been that the driver and passengers are riding inside a Faraday Cage There are HUGE holes in that assumption in the form of non-metallic parts and paint preventing contact between metal parts. An enclosure forms a Faraday cage ONLY if it is continuous. and ONLY if all conductors penetrating it have either a feed-through to the enclosure or, if a shielded conductor, the shield is bonded to the enclosure at the point of entry. Modern vehicles have lots of paint between metal parts. When I used Hamsticks on my Volvo S80, I had to bond the mount to the trunk, and I had to bond around the trunk hinges. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wes_n...@triconet.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
On 4/14/2017 1:13 PM, KENT TRIMBLE wrote: > The assumption has always been that the driver and passengers are riding > inside a Faraday Cage and therefore are safe from RF radiated by an HF > antenna, regardless of where located and regardless of power level. When I take my 2011 Ford Focus through the car wash, I put the mag-mount VHF antenna inside the car but it is still connected to the radio. I have no problem picking up the usual 2- and 3/4- meter repeaters that way. So much for the "Faraday Cage". :) 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Hi Jim . . . That was my point, although without mentioning the paint. I should have said "worth RE-considering." Kent On 4/14/2017 3:33 PM, Jim Brown wrote: On Fri,4/14/2017 1:13 PM, KENT TRIMBLE wrote: The assumption has always been that the driver and passengers are riding inside a Faraday Cage There are HUGE holes in that assumption in the form of non-metallic parts and paint preventing contact between metal parts. An enclosure forms a Faraday cage ONLY if it is continuous. and ONLY if all conductors penetrating it have either a feed-through to the enclosure or, if a shielded conductor, the shield is bonded to the enclosure at the point of entry. Modern vehicles have lots of paint between metal parts. When I used Hamsticks on my Volvo S80, I had to bond the mount to the trunk, and I had to bond around the trunk hinges. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k9...@socket.net - No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.8012 / Virus Database: 4769/14314 - Release Date: 04/14/17 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
On Fri,4/14/2017 1:13 PM, KENT TRIMBLE wrote: The assumption has always been that the driver and passengers are riding inside a Faraday Cage There are HUGE holes in that assumption in the form of non-metallic parts and paint preventing contact between metal parts. An enclosure forms a Faraday cage ONLY if it is continuous. and ONLY if all conductors penetrating it have either a feed-through to the enclosure or, if a shielded conductor, the shield is bonded to the enclosure at the point of entry. Modern vehicles have lots of paint between metal parts. When I used Hamsticks on my Volvo S80, I had to bond the mount to the trunk, and I had to bond around the trunk hinges. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
The assumption has always been that the driver and passengers are riding inside a Faraday Cage and therefore are safe from RF radiated by an HF antenna, regardless of where located and regardless of power level. The truth of that assumption, coupled with how much shielding a vehicle actually presents, is worth considering. Until the RF Exposure business came along, no one considered safety for those outside the car. Less and less body-metal, roofs made entirely of glass, more electronics both on and inside human bodies (over and above the vehicle's electronics), the close proximity of the antenna . . . all of which, in my opinion, argue for a re-think of high-power mobile operation. In the 1970s I greatly enjoyed mobile CW with an FT-101E until my first child started occupying the rear seat. After she came along, I opted for no further mobile work of any kind, at least when she and her siblings were in the car. I'm not a geneticist, but neither am I willing to push my luck with the gazillion of cell-divisions going on every second in a child's growing body. Excellent question to ask, Lynn. 73, Kent K9ZTV On 4/14/2017 2:39 PM, Lynn W. Taylor, WB6UUT wrote: A few days ago we talked about the RF exposure rules related to Amateur Radio, and how we all had to sign that we complied with those rules when we renew our tickets. I wonder if the exposure to passing cars is below the limit with a Hustler or similar antenna on the rear bumper? Are we good at 100w, 1000w? Should I have not asked this question? 73 -- Lynn __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Hi Mike I am running the KPA-500 now on battery power. It isn't mobile, but it could be with the same hardware. The method I use is a 115 volt AC inverter that runs off a 12 volt battery. I use the Xantrex Prosine Pure Sine Wave 1800 watt inverter. https://www.amazon.com/Xantrex-Technologies-1800PS-1800-Watt/dp/B225DC This unit is crystal controlled and does not generate much RFI at all. It does require huge input wiring and some substantial battery capacity. I see 75+ amps on CW peaks, and to keep the regulation OK, the stranded wire is about 3/4" in diameter and very short between the battery and the inverter. I also have a 200 amp safety fuse in line as well. It has worked great with two 275 AH solar batteries and you would not even know you were running on batteries. The output of the sinewave inverter is quite solid at around 117 vac. It has been in use for a few years. No problems. I would run two moosey batteries besides the auto battery and install a new alternator in your vehicle for charging the batteries. I use solar panels here for charging, and on a sunny day see about 25 amps charging the batteries between transmissions. I can run all day on a sunny day, and about 10 or maybe 12 hours casual operating at night with just the batteries. It is pricey, but cool. I use the KPA-500 on six meters too and have been able to catch openings and work plenty of DX with the solar power. Dave K1WHS On 4/14/2017 4:00 PM, Mike Smith VE9AA wrote: Big fan of mobile ham radio here...Have always run 100w. Would like to do more. (500w-1000w) Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to generate 15a @ 115ac?) Related question...if you haven't run a KPA500 mobile, what amp HAVE you run mobile? Thanks Mike VE9AA...VE9AA/m Mike, Coreen & Corey Keswick Ridge, NB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k1...@metrocast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
A few days ago we talked about the RF exposure rules related to Amateur Radio, and how we all had to sign that we complied with those rules when we renew our tickets. I wonder if the exposure to passing cars is below the limit with a Hustler or similar antenna on the rear bumper? Are we good at 100w, 1000w? Should I have not asked this question? 73 -- Lynn On 4/14/2017 12:05 PM, Phil Wheeler wrote: And then there's the car's electronics. Some modern ones don't react well to high power RF. I had one which didn't like 100 W -- though backing off to 50 W made all things OK. Phil W7OX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
On the same vane, My 2005, Range Rover would lock and unlock (repeat….) when I transmitted on 20M - other bands it was fine. I was running 50W - totally separate 12V Truck battery , not connected to the Range Rover. Antenna 1:1 Enjoy the ride ! Regards Tim A45wg > On Apr 14, 2017, at 11:12 PM, Fred Jensen wrote: > > I had a 100W HF mobile in a Ford Ranger in early 2001. Transmitting would > disable the cruise control if it was on. I gave the truck to #1 grandson > when I bought a 2003 Silverado [he promptly rolled the Ranger [:-(( ]. > > The computer that operated the driver's seat exceeded the capacity/speed of > the computer that got us to the moon by an order of magnitude or more and it > was one of a dozen or so in the truck. I put a 25 watt UHF FM rig in it, and > the first time I transmitted, the seat computer lost its mind and pinned me > to the steering wheel. $380 later, that was fixed and I resorted to an HT in > the truck. > > I wouldn't put 500 watts in today's vehicles. > > 73, > > Fred ("Skip") K6DGW > Sparks NV USA > Washoe County DM09dn > > > > On 4/14/2017 11:58 AM, brian wrote: >> In the old days, cars didn't have computers. Getting away with running a KW >> worked. Today may be different. >> >> Nobody seems to be concerned about crashing/killing the computer(s) running >> the whole car. Could lead to a really dangerous situation. >> >> Don't know what the replacement cost for the motherboard/peripherials of a >> car computer system is. My guess: big bucks. >> >> What current experience is there out there? >> >> 73 de Brian/K3KO >> >> >> >> >> On 4/14/2017 16:45 PM, Bert Craig wrote: >>> Yaesu FT-891 w/ >>> HLA 305V @ approx. 200 W. >>> http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus >>> >>> Vy 73 de Bert >>> WA2SI >>> >>> Sent from my android device. >>> >>> -Original Message- >>> From: Mike Smith VE9AA >>> To: Elecraft@mailman.qth.net >>> Sent: Fri, 14 Apr 2017 12:00 >>> Subject: [Elecraft] KPA500 mobile? >>> >>> Big fan of mobile ham radio here...Have always run 100w. >>> >>> Would like to do more. (500w-1000w) >>> >>> >>> >>> Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to >>> generate 15a @ 115ac?) >>> >>> >>> >>> Related question...if you haven't run a KPA500 mobile, what amp HAVE you run >>> mobile? >>> >>> >>> >>> Thanks >>> >>> >>> >>> Mike VE9AA...VE9AA/m >>> >>> >>> >>> Mike, Coreen & Corey >>> >>> Keswick Ridge, NB >>> >>> >>> >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to wa...@arrl.net >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to als...@comcast.net >>> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to k6...@foothill.net <mailto:k6...@foothill.net> >> >> --- >> This email has been checked for viruses by AVG. >> http://www.avg.com <http://www.avg.com/> >> >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > <http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm> > Post: mailto:Elecraft@mailman.qth.net <mailto:Elecraft@mailman.qth.net> > > This list hosted by: http://www.qsl.net <http://www.qsl.net/> > Please help support this email list: http://www.qsl.net/donate.html > <http://www.qsl.net/donate.html> > Message delivered to a4...@sy-edm.com <mailto:a4...@sy-edm.com> __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
I had a 100W HF mobile in a Ford Ranger in early 2001. Transmitting would disable the cruise control if it was on. I gave the truck to #1 grandson when I bought a 2003 Silverado [he promptly rolled the Ranger [:-(( ]. The computer that operated the driver's seat exceeded the capacity/speed of the computer that got us to the moon by an order of magnitude or more and it was one of a dozen or so in the truck. I put a 25 watt UHF FM rig in it, and the first time I transmitted, the seat computer lost its mind and pinned me to the steering wheel. $380 later, that was fixed and I resorted to an HT in the truck. I wouldn't put 500 watts in today's vehicles. 73, Fred ("Skip") K6DGW Sparks NV USA Washoe County DM09dn On 4/14/2017 11:58 AM, brian wrote: In the old days, cars didn't have computers. Getting away with running a KW worked. Today may be different. Nobody seems to be concerned about crashing/killing the computer(s) running the whole car. Could lead to a really dangerous situation. Don't know what the replacement cost for the motherboard/peripherials of a car computer system is. My guess: big bucks. What current experience is there out there? 73 de Brian/K3KO On 4/14/2017 16:45 PM, Bert Craig wrote: Yaesu FT-891 w/ HLA 305V @ approx. 200 W. http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus Vy 73 de Bert WA2SI Sent from my android device. -Original Message- From: Mike Smith VE9AA To: Elecraft@mailman.qth.net Sent: Fri, 14 Apr 2017 12:00 Subject: [Elecraft] KPA500 mobile? Big fan of mobile ham radio here...Have always run 100w. Would like to do more. (500w-1000w) Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to generate 15a @ 115ac?) Related question...if you haven't run a KPA500 mobile, what amp HAVE you run mobile? Thanks Mike VE9AA...VE9AA/m Mike, Coreen & Corey Keswick Ridge, NB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa...@arrl.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to als...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k6...@foothill.net --- This email has been checked for viruses by AVG. http://www.avg.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
And then there's the car's electronics. Some modern ones don't react well to high power RF. I had one which didn't like 100 W -- though backing off to 50 W made all things OK. Phil W7OX On 4/14/17 10:27 AM, Ron D'Eau Claire wrote: One issue with mobile QRO is the antenna. While a mobile whip/loading coil combo can be designed for high power, it becomes difficult to prevent corona discharge from the end of the whip while transmitting at high power. One fairly common solution decades ago was to mount a copper toilet tank float on the end of the antenna. Of course the wind resistance then required guying the whip. Since it was typically on the rear of the car, a nylon cord from the mid-point to somewhere forward on the roof was common. Another approach - back when car bodies were steel - was to extend the whip to it could be bent over and tied to the front bumper, turning the car body and whip into a small loop antenna. Today, it might be hard to establish the necessary distance from the antenna while sitting in the car to meet modern RF exposure limits, especially on 20 meters and up. I never went QRO in my car, but had buddies who tinkered with it way back when vacuum tubes were "king". Back then I lived in the land of the "California Kilowatt" (Southern Calif.). They mounted outboard generators on their car engines to handle the power demand. Adding filaments, etc., a kW mobile station might require 1.5 or 2 kW of d.c. power to run it. Got a chuckle out of them when they'd key the mic to transmit while sitting at a stop light with the engine at idle, and the sudden added power demand caused the engine to stall. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
In the old days, cars didn't have computers. Getting away with running a KW worked. Today may be different. Nobody seems to be concerned about crashing/killing the computer(s) running the whole car. Could lead to a really dangerous situation. Don't know what the replacement cost for the motherboard/peripherials of a car computer system is. My guess: big bucks. What current experience is there out there? 73 de Brian/K3KO On 4/14/2017 16:45 PM, Bert Craig wrote: Yaesu FT-891 w/ HLA 305V @ approx. 200 W. http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus Vy 73 de Bert WA2SI Sent from my android device. -Original Message- From: Mike Smith VE9AA To: Elecraft@mailman.qth.net Sent: Fri, 14 Apr 2017 12:00 Subject: [Elecraft] KPA500 mobile? Big fan of mobile ham radio here...Have always run 100w. Would like to do more. (500w-1000w) Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to generate 15a @ 115ac?) Related question...if you haven't run a KPA500 mobile, what amp HAVE you run mobile? Thanks Mike VE9AA...VE9AA/m Mike, Coreen & Corey Keswick Ridge, NB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa...@arrl.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to als...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Back in the 80's and early 90's, I ran a KW mobile SSB, and never had any negative issues. I used the Hustler Super Resonators (still made and in use by many today), and they are rated at 1KW. I can't remember what automobiles I installed it in, but I remember using a much larger battery, and a larger alternator. Was not a good idea to use it with the car not running In fact, I still have the amp in the closet; it is a Magnus MA1000B, ran on 12V (with the car running, 13.4 or so) and used eight, 31003OD Power Transistors. Requires about 60 Watts, for 1000W input. Dick, K8ZTT From: Ron D'Eau Claire To: 'Mike Smith VE9AA' Cc: Elecraft@mailman.qth.net Sent: Friday, April 14, 2017 11:28 AM Subject: Re: [Elecraft] KPA500 mobile? One issue with mobile QRO is the antenna. While a mobile whip/loading coil combo can be designed for high power, it becomes difficult to prevent corona discharge from the end of the whip while transmitting at high power. One fairly common solution decades ago was to mount a copper toilet tank float on the end of the antenna. Of course the wind resistance then required guying the whip. Since it was typically on the rear of the car, a nylon cord from the mid-point to somewhere forward on the roof was common. Another approach - back when car bodies were steel - was to extend the whip to it could be bent over and tied to the front bumper, turning the car body and whip into a small loop antenna. Today, it might be hard to establish the necessary distance from the antenna while sitting in the car to meet modern RF exposure limits, especially on 20 meters and up. I never went QRO in my car, but had buddies who tinkered with it way back when vacuum tubes were "king". Back then I lived in the land of the "California Kilowatt" (Southern Calif.). They mounted outboard generators on their car engines to handle the power demand. Adding filaments, etc., a kW mobile station might require 1.5 or 2 kW of d.c. power to run it. Got a chuckle out of them when they'd key the mic to transmit while sitting at a stop light with the engine at idle, and the sudden added power demand caused the engine to stall. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to richarddw1...@yahoo.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Not me personally but my Elmer, the late W7UVR, back in the AM days ran a high-level modulated 4-1000A. I've got his QSLs around here someplace, but in the meantime someone else has posted them too: http://hamgallery.com/qsl/country/USA/Washington/w7uvr.htm He later converted to SSB, increased the generator to 15KW, had another ham friend cut up and build beautiful tubular hinges to fold the elements of a 3-element tribander for travel. The home station was equally impressive, although until Collins introduced their noise blanker, was primarily used to transmit bulletins or code practice. The mobile rig was the answer to the noise problem before that. Wes N7WS On 4/14/2017 9:00 AM, Mike Smith VE9AA wrote: Related question...if you haven't run a KPA500 mobile, what amp HAVE you run mobile? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
One issue with mobile QRO is the antenna. While a mobile whip/loading coil combo can be designed for high power, it becomes difficult to prevent corona discharge from the end of the whip while transmitting at high power. One fairly common solution decades ago was to mount a copper toilet tank float on the end of the antenna. Of course the wind resistance then required guying the whip. Since it was typically on the rear of the car, a nylon cord from the mid-point to somewhere forward on the roof was common. Another approach - back when car bodies were steel - was to extend the whip to it could be bent over and tied to the front bumper, turning the car body and whip into a small loop antenna. Today, it might be hard to establish the necessary distance from the antenna while sitting in the car to meet modern RF exposure limits, especially on 20 meters and up. I never went QRO in my car, but had buddies who tinkered with it way back when vacuum tubes were "king". Back then I lived in the land of the "California Kilowatt" (Southern Calif.). They mounted outboard generators on their car engines to handle the power demand. Adding filaments, etc., a kW mobile station might require 1.5 or 2 kW of d.c. power to run it. Got a chuckle out of them when they'd key the mic to transmit while sitting at a stop light with the engine at idle, and the sudden added power demand caused the engine to stall. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
George Wallner, AA7JV, is a superb engineer and has done a half dozen DXpeditions to islands around the world. For one of his most recent, he used SGC amps so that he could run on batteries that were recharged by a small generator running in Economy mode, greatly reducing the quantity of fuel that he had to carry on the boat. Your advice regarding the alternator, battery, and DC wiring is also quite important. 73, Jim K9YC On Fri,4/14/2017 9:45 AM, Phil Hystad wrote: Not sure if the SGC SG-500 is still available though, I heard a while back that SGC had stopped production but it still appears on their web sitehttp://www.sgcworld.com/ampProductPage.html. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Years ago I looked into the idea of running 500 watts mobile and my amp of interest was the SGC SG-500 SmartPowerCube amplifier. Since the SGC company was just a 20 minute drive from my home I decided to go there and see if I could find someone technical to talk to. I did talk with one of the technicians. What I learned was, most people who use this Amp mobile usually use a second battery to run the amps current demand of 40 amps with peaks up close to 90 amps for key down full power. The assumption is that the duty cycle is low enough to allow the Alternator to maintain charge on the battery simultaneously with providing raw power itself. The implementation though required heavy duty wiring from the main vehicle battery/alternator source with diodes in line that are obviously high-current and thus pricey. Also, some vehicles may have need to upgrade their Alternator although on my 3/4 ton pickup truck, I already had an oversized alternator in place. I had my truck wired to handle the current draw and this was done at one of those “car” electronics shops who do this regularly for guys (usually guys) who want big hunking audio amps in their cars that also demand high current power. So, this kind of installation was a regular day at work for that store (called Car Toys, Washington State and maybe other locations). However, I never did buy the amp — kept putting it off and stayed with 100 watts of power and eventually (two years ago) opted out of mobile operation in favor of portable operation and instead of 500 watts, primarily 5 watts or whatever I would put out with my KX1, KX3, and now KX2 (but have not had the KX2 long enough to work in the field portable). But, the idea of running the KPA500 because it runs off of 120 VAC is not something I would ever try just because of the hassle. I would get another suitable 500 watt class amp if I were still into that and leave my KPA500 fixed in the shack. Not sure if the SGC SG-500 is still available though, I heard a while back that SGC had stopped production but it still appears on their web site http://www.sgcworld.com/ampProductPage.html. 73, phil, K7PEH > On Apr 14, 2017, at 9:00 AM, Mike Smith VE9AA wrote: > > Big fan of mobile ham radio here...Have always run 100w. > > Would like to do more. (500w-1000w) > > > > Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to > generate 15a @ 115ac?) > > > > Related question...if you haven't run a KPA500 mobile, what amp HAVE you run > mobile? > > > > Thanks > > > > Mike VE9AA...VE9AA/m > > > > Mike, Coreen & Corey > > Keswick Ridge, NB > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to phys...@mac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
Yaesu FT-891 w/ HLA 305V @ approx. 200 W. http://www.rmitaly.com/index.php/en/news/92-news/19487-arrl-review-rm-italy-hla-305v-plus Vy 73 de Bert WA2SI Sent from my android device. -Original Message- From: Mike Smith VE9AA To: Elecraft@mailman.qth.net Sent: Fri, 14 Apr 2017 12:00 Subject: [Elecraft] KPA500 mobile? Big fan of mobile ham radio here...Have always run 100w. Would like to do more. (500w-1000w) Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to generate 15a @ 115ac?) Related question...if you haven't run a KPA500 mobile, what amp HAVE you run mobile? Thanks Mike VE9AA...VE9AA/m Mike, Coreen & Corey Keswick Ridge, NB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa...@arrl.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA500 mobile?
Big fan of mobile ham radio here...Have always run 100w. Would like to do more. (500w-1000w) Has anyone here ever run a KPA500 mobile? (if so, how? Big inverters to generate 15a @ 115ac?) Related question...if you haven't run a KPA500 mobile, what amp HAVE you run mobile? Thanks Mike VE9AA...VE9AA/m Mike, Coreen & Corey Keswick Ridge, NB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com