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Re: FS: TennaDipper, Phasers, OHR WM-2, Rasp PI4B
Bobby Rolph
GM. I would like the pi4 with the GPS hat. Just send me your payment info. 73
toggle quoted messageShow quoted text
Bobby Rolph
On Wednesday, May 13, 2020, 12:19 PM, JT Croteau <jt.tobit@...> wrote:
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FS: TennaDipper, Phasers, OHR WM-2, Rasp PI4B
JT Croteau
Need to find a new home for some shack projects. I've been having too
much fun with a new radio and need to fund some final installing items for it. QRPKits Tenna Dipper, nicely built and works well. $42 http://qrpkits.com/tennadipperII.html OHR WM-2 QRP Wattmeter - Freshly built, not issues. $95 Raspberry PI 4B 2GB, two piece aluminum heatsink, with Adafruit GPS HAT and external antenna. No issues, been running Gentoo Linux for several months. $60 80M and 30M Phaser FT8 rigs from Midnite Design. These are serial Nos. 75 and 76. I took great care to assemble these but do not have the time to get them on the air to verify they are working FB. They tested well during assembly and should work but I''m going to offer these as a pair for a low price since I can't test. $75 for both. All prices include Priority Mail shiipping. Thanks for looking. N1ESE
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Re: HI-PER-MITE parts question
nm0s_qrp
Check out the schematic for the SSB-Mite. It shows how to do it explicitly, and you can just bring that mod directly over to the HiPerMite.
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SSS Results
John Lonigro
Well, we had a good turnout Sunday night. Fifteen people entered the contest, three of whom entered for the first time. Welcome to Peter (AA2VG) from Huntington, NY; Scott (W5ESE) from Dripping Springs, TX; and Woody (K1LB) from Reno, NV. I hope you three become regular entrants in the 4SQRP Second Sunday Sprints. And thanks to all for participating.
The winner for May is John (K4BAI) with 29 QSO points. Congratulations to John on is fine score. For the year, Chas (W2SH) is still in the lead with 81 points, followed by John (K4BAI) with 75 points. Coming in third is Nick (WB5BKL) with 51 points. I tally points separately from the website where you enter your score and haven't checked that site lately, to see if we still agree. Hope so. Unless someone brings a discrepancy to my attention, I'm using my official spreadsheet to determine monthly winners, as well as the overall winner for the year. And, if there is a discrepancy, I keep screen shots of each month's results and am able to go back and make corrections if necessary. But, as we all know, I never make mistooks (hi). Cngratulations again to K4BAI. He will receive the May certificate for most QSO points shortly. 72 to all and please stay safe, John, AA0VE 4SQRP Contest Coordinator
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Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 05/13/2020 20:00-21:00
#cal-reminder
main@4SQRP.groups.io Calendar <main@...>
Reminder: Wednesday Evening 40 and 80 meter Nets When: Wednesday, 13 May 2020, 20:00 to 21:00, (GMT-05:00) America/Chicago Where:40 and 80 Meters Organizer: jomatlock@... Description: The 40 Meter Net will be at 8:00 pm central time on 7.122 +-. QRM
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Re: Attic?
Michael McEwen
Suggestions for G5RV designs? 73 Doc K5OSA
On Tue, May 12, 2020, 14:53 Michael McEwen <michael.t.mcewen@...> wrote:
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Re: Attic?
Michael McEwen
Great idea. I'll put the GR5 option on the "to try" list. 73 Doc K5OSA
On Tue, May 12, 2020, 08:35 Wayne Dillon <wayne.dillon@...> wrote:
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Re: Attic?
Michael McEwen
TNX!!!! Doc K5OSA
On Mon, May 11, 2020, 18:54 Thomas Martin <tem494@...> wrote: Doc
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Re: Attic?
david gauding
I never had much luck with end-feds in the attic. I was a new ham at that time and did not fully understand how to ground the antenna effectively from up there.
However, I did install a tuned doublet in the attic and used it for over ten years with good results. Achieved WAS, WAC and 130 DXCC countries on CW. All of this was done on QRP. I operated from a two-story townhouse condo in two different locations. Used a 33' radiator across the diagonal and added 16.5' on the ends to get 10-40M coverage. Later added slinkys to the ends to increase coverage to 10-80M. From overhead the basic antenna looked like the letter "Z". Using borrowed rigs I could operate 160M feeding the complete antenna against ground. I found that quite amazing at the time. The feedline was usually 300 ohm line. I snaked it from the attic to the basement shack using space along side a forced air duct. Before trying the attic antenna I tuned a rain gutter & downspout assembly that covered 10-80M. I always recommend trying that first to get on the air quickly. My best results were usually on 40M and 80M followed by 20M. Dave Gauding, NF0R
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Re: HI-PER-MITE parts question
Nick-
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Hi-Per-Mite integration in a Ten-Tec Century 21
Hello fellow hams and 4S QRP’ers... Alternatively, I see there is an adjustable gain option using a pot. The directions, and other threads mention using a pot, but the directions say ‘use a pot for R11 AND R12.’ How would I wire that using one pot? How many ohms should I select to keep the output of the board in the higher dB gain area? I’m a tinkerer, not an engineer and need some help with that.
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Re: Attic?
Mike Sanders
Amen. We are finding out from WSPR and other digital modes about
propagation we never knew before. Using WSPR at mw levels can tell us volumes about our antennas, station equipment and prop in almost an instant. Good post. Thanks es 73, Mike K0AZ On 5/11/2020 9:50 PM, John - KK4ITX via groups.io wrote: Doc, -- This email has been checked for viruses by AVG. https://www.avg.com
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Re: Attic?
Wayne Dillon
Worked 2 of my 1000 mile/watt awards with an attic mounted 1/2 size G5RV (mounted at the ridge) with normal shingles. It actually proved better on 40 than an outdoors 134'6" wahr/9:1 unun. Mu current location has a metal roof so I'm going the "ground mounted vertical" route (as soon as the rain stops!) Be blessed all, Wayne - NQ0RP -- QRP - EFFICIENCY AND SKILL, NOT POWER.
God Bless from Wayne Dillon - NQ0RP Fate whispered to courageous "You cannot withstand the storm" Courageous whispered back "I am the storm"
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Re: Attic?
Doc,
toggle quoted messageShow quoted text
Opinions and suggestions are great but I have found that trying is best.... because each location is different for way too many reasons to cover here. You may find that a Dipole works better ? Build the endfed, should be less than $10 at QRP levels. See how it works. If it doesn’t work out you already have the coax run to try something else. I have many failures in my shed and it’s part of the hobby. I use a 35ft EF and cover the U.S., Canada and more at both QRP and WSPR levels, from Florida. To see how my antenna is performing I use WSPR....... yes it is a Digital Mode but what it tells me is that my 5w CW should be heard wherever WSPR reports hearing me at just a 200mw signal. A 200mw signal is equal to about 4w CW. The comparison between my Vertical and the EF is quite clear........ sometimes better or not, I use WSPR to help me to determine which antenna to use. Using WSPR will tell you more about your system than just about anything else because it’s a real time result, not theory..... doesn’t depend on perfect CW for the RBN to decode. We are fortunate to now have tools (FREE) at our disposal that can give us real time answers to which antenna is best......... at this minute ! 72, John
On May 11, 2020, at 20:42, w2sh@... wrote:
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Re: Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 05/13/2020 20:00-21:00
#cal-reminder
Martin
I have had the 4SQRP NS-40+VXO, SS-40 and Magic Box for some time. Bought them as kits, built and used them. They were all work as far as i know. The NS-40 has the VXO circuit installed in the cabinet with it and a switch selects it or a xtal jack on the front. The cabinets are DIY that I built. I have not used them for several years and they need a home as I have moved on. Perhaps someone can put them to use and enjoy them. I've long since lost track of what I paid or what they might be worth so I'm suggesting $110 for the batch including shipping in the US. But feel free to make me an offer. Thanks, Martin K0BXB
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Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 05/13/2020 20:00-21:00
#cal-reminder
main@4SQRP.groups.io Calendar <main@...>
Reminder: Wednesday Evening 40 and 80 meter Nets When: Wednesday, 13 May 2020, 20:00 to 21:00, (GMT-05:00) America/Chicago Where:40 and 80 Meters Organizer: jomatlock@... Description: The 40 Meter Net will be at 8:00 pm central time on 7.122 +-. QRM
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Re: Attic?
w2sh@...
Another suggestion is to view the June 1949 QST with several indoor antenna designs.
72,
Charles, W2SH
From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of John Nicholas <stnick@...>
Sent: Monday, May 11, 2020 20:25 To: main@4sqrp.groups.io <main@4SQRP.groups.io> Subject: Re: [4SQRP] Attic? My Elmer, has the same problem. He has lived 25 years in this home. Multiple antennas in his attic. He does just fine. The biggest thing is they are closer to the ground. You should
check the October, 2007 issue of QST. Article on a 48' end fed in the attic with a J-Pole. There would be many variations on this one.
FYI: If the metal foil is on the rafters or part of the roof sheathing, it will cause problems. It is a radiant barrier. South of 34* N in CONUS they have some value for efficiency. If it is just stretched out across the ceiling joists and
insulation, you can remove it. That installation is just expensive snake oil. My day job is a Home Energy Auditor.
73 KE0ZUW John
-- Charles Moizeau, W2SH
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Re: Attic?
My Elmer, has the same problem. He has lived 25 years in this home. Multiple antennas in his attic. He does just fine. The biggest thing is they are closer to the ground. You should check the October, 2007 issue of QST. Article on a 48' end fed in the attic with a J-Pole. There would be many variations on this one.
toggle quoted messageShow quoted text
FYI: If the metal foil is on the rafters or part of the roof sheathing, it will cause problems. It is a radiant barrier. South of 34* N in CONUS they have some value for efficiency. If it is just stretched out across the ceiling joists and insulation, you can remove it. That installation is just expensive snake oil. My day job is a Home Energy Auditor. 73 KE0ZUW John
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Re: Attic?
Thomas Martin
Doc
toggle quoted messageShow quoted text
I used an end fed with balun while living in Manvel Tx I worked all over Europe England Africa Centeral American and South America If your roof has the heat reflecting foil it doesn’t work well but regular construction works great. Tom K0amd
On Monday, May 11, 2020, Michael McEwen <michael.t.mcewen@...> wrote:
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Attic?
Michael McEwen
There is no metal above the attic of our conventional construction home. The roof is shingle over frame. What's the effect if I put a ENDFEDZ 10.20.40 up there? Covenants don't allow obvious outdoor types. 72, Doc K5OSA
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