Re: [Elecraft] Follow-up to OT
Jim I found the (so called Optimizers) to be VERY Noisy when the Sun is Just starting to hit the Solar Panel ARRAY and the Optimizer it Trying to Balance the Current (load) of ALL the panels. I would Bet the FCC Test are being Run when the Sun is Either Full ON or Full OFF, Not in its Full Dynamic Switching Mode. Ray WA6VAB K3 (sum what Retired) From: Jim Brown Sent: Saturday, April 30, 2022 10:26 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Follow-up to OT On 4/27/2022 2:45 PM, jerry wrote: > Samlex inverters These inverters are NOT quiet. Slide 213 in this pdf shows what I had to do to kill the trash coming out of their SMALLEST one to use it to power the logging computer for HF mobile contesting! http://k9yc.com/KillingRXNoiseVisalia.pdf My partner in these events, W6GJB, bought one or two sizes up; it was MUCH worse, and there was nothing we could do to make it usable. FCC Part 15 Class B is still a very loose RFI spec, and the specified testing setups fail to reveal the design and construction errors that can cause massive radiated trash. 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 wa6...@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] Follow-up to OT
On 4/27/2022 2:45 PM, jerry wrote: Samlex inverters These inverters are NOT quiet. Slide 213 in this pdf shows what I had to do to kill the trash coming out of their SMALLEST one to use it to power the logging computer for HF mobile contesting! http://k9yc.com/KillingRXNoiseVisalia.pdf My partner in these events, W6GJB, bought one or two sizes up; it was MUCH worse, and there was nothing we could do to make it usable. FCC Part 15 Class B is still a very loose RFI spec, and the specified testing setups fail to reveal the design and construction errors that can cause massive radiated trash. 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] Follow-up to OT
Jim is right, my little Genasun is 60w, I believe, 5A at 14.2v for A123 LiFePO4 batteried 73 Eric WD6DBM On Wed, Apr 27, 2022, 5:46 PM Jim Brown wrote: > Yes, Genasun controllers are pretty quiet. I've been using them for at > least 5 years. I've never seen one rated for more than 10A. > > 73, Jim K9YC > > On 4/27/2022 4:15 PM, Eric Norris wrote: > > I use a Genasun 60A solar controller for my K2 FD station. It is dead > > quiet as far as I can tell, tiny, and available with the proper voltage > for > > different chemistries. Also available in different sizes. > > __ > 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 norrislawfi...@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] Follow-up to OT
Yes, Genasun controllers are pretty quiet. I've been using them for at least 5 years. I've never seen one rated for more than 10A. 73, Jim K9YC On 4/27/2022 4:15 PM, Eric Norris wrote: I use a Genasun 60A solar controller for my K2 FD station. It is dead quiet as far as I can tell, tiny, and available with the proper voltage for different chemistries. Also available in different sizes. __ 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] Follow-up to OT
I use a Genasun 60A solar controller for my K2 FD station. It is dead quiet as far as I can tell, tiny, and available with the proper voltage for different chemistries. Also available in different sizes. 73 Eric WD6DBM On Wed, Apr 27, 2022, 2:46 PM jerry wrote: > On a related note - Genasun advertises that their solar charging > controllers are > quiet. > >- Jerry KF6VB > > On 2022-04-27 13:43, ws6x@gmail.com wrote: > > FWIW: > > Thanks to all who responded to my inquiry about "clean" inverters. Here > > is a > > summary. > > While it is unlikely to find any inverter which is 100% rf quiet, some > > designs are much better, or worse, than others. These following > > products are > > FCC compliant [Title 47 (CFR), Part 15 Subpart B for Class B Device] > > and > > have proven to be rf quiet in field use: > > > > Morningstar SureSine series > > Samlex inverters > > Cotek inverters > > One person reported that the SunForce PRO series inverters were very > > quiet. > > > > > > Thanks again, > > Jim - WS6X > > > > > > __ > > 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 je...@tr2.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 norrislawfi...@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] Follow-up to OT
On a related note - Genasun advertises that their solar charging controllers are quiet. - Jerry KF6VB On 2022-04-27 13:43, ws6x@gmail.com wrote: FWIW: Thanks to all who responded to my inquiry about "clean" inverters. Here is a summary. While it is unlikely to find any inverter which is 100% rf quiet, some designs are much better, or worse, than others. These following products are FCC compliant [Title 47 (CFR), Part 15 Subpart B for Class B Device] and have proven to be rf quiet in field use: Morningstar SureSine series Samlex inverters Cotek inverters One person reported that the SunForce PRO series inverters were very quiet. Thanks again, Jim - WS6X __ 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 je...@tr2.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
[Elecraft] Follow-up to OT
FWIW: Thanks to all who responded to my inquiry about "clean" inverters. Here is a summary. While it is unlikely to find any inverter which is 100% rf quiet, some designs are much better, or worse, than others. These following products are FCC compliant [Title 47 (CFR), Part 15 Subpart B for Class B Device] and have proven to be rf quiet in field use: Morningstar SureSine series Samlex inverters Cotek inverters One person reported that the SunForce PRO series inverters were very quiet. Thanks again, Jim - WS6X __ 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] Follow-up: [Sorta OT]: Does terrain affect HF radiation patterns?
First, TNX for all the replies. You've given me a lot of information to wade through. In doing a quick browse about HFTA on the web I found a couple of presentations, which while being apples and oranges to my situation, nevertheless exhibited some of the same characteristics. It was really educational to see their graphs of what terrain can do to a signal's take-off angle and how the height of the antenna interacts with the terrain. That being said, I'm wondering if this explains another phenomena I've observed. Another beacon system exists in the form of W1AW in that it gives a picture of closer in/domestic propagation on the various bands. In my experience their signal on 20M is surprisingly weak here most of the time, while 17M frequently shows full strength on the signal indicator during the periods when I'd expect that band to be open. I've also seen times when 17 and 40M were both fairly strong, and it would seem logical that 20 should also be in the sweet spot at that moment, but it isn't. Is this possibly due to the terrain/antenna combination either on my end or W1AW's? Again, TNX for the very informative comments. 73, Al On Mon September 15 2014 8:54:38 pm Al Gulseth wrote: Greetings all, I've been following some of the antenna-related discussions here recently, and I've decided to see what the gurus here have to say about a question I have related to my QTH. As my post title indicates, what (if any) effect does nearby terrain have on HF radiation patterns? Is it along the lines of VHF? Without going into too much detail, my QTH is partway up what amounts to a long broad slope to the north. Just for grins I plugged my QTH coordinates and an arbitrary antenna at 50 feet AGL into the FCC's Height Above Average Terrain calculator. Here are the results, in meters of course, which shows what the surrounding terrain is like; the results seem realistic from what I know of the local area. I would also note that the area less than two miles away, which is not used in these calculations, would nevertheless correspond fairly closely slope-wise in my estimation. I'm aware that this calculation is intended for FM/TV broadcast: my question is whether it could be of use for hams on HF: Antenna Radiation Center Heights Above Individual Radials: 0.0° -107.3 meters 45.0° -37.4 meters 90.0° 39.6 meters 135.0°100.3 meters 180.0°92.9 meters 225.0°86.6 meters 270.0°-1.6 meters 315.0°-40.0 meters Now, my observations: I've been using an inexpensive SW portable with its built-in whip to monitor some of the International Beacon Project and 10M beacon frequencies while I'm around the house. By using the portable, in my estimation I achieve two things: 1) it should hear a mostly omnidirectional pattern and 2) beacons heard under this circumstance should indicate the band would be usable to the area in the beacon's vicinity. That being said, I have found that other than 4U4UN, I'm most consistently hearing South American beacons, and at least some of them can usually be heard if I'm hearing anything at all. So, is the terrain around me affecting this, or if not, what might be happening? TNX/73, Al __ 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 wb5...@centurytel.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
