Re: Arduino Shield Kit for WSPR: Timekeeping questions
Hi Ryan
No reason not to do it this way... it all depends on the accuracy of the real time clock. If the timebase is a TCXO then it could run the U3S in WSPR mode for weeks or months.?
73 Hans G0UPL
On Sat, Oct 14, 2017 at 9:39 AM, Ryan Flowers <geocrasher@...> wrote: Hello All,
I am building the arduino shield kit for use as a WSPR transmitter, and I have a question about timekeeping. Now clearly, the GPS kit is great and preferred for many reasons. In addition to providing time and location it also provides frequency drift correction. But what if one doesn't actually care about those things, and only wants the?time to be accurate. There are several methods of adding a RTC to the arduino- is there any reason one of these clocks would not provide enough stability to run WSPR for weeks or months on end??
And yes I know all the arguments about not reinventing the wheel, but I can't help that reinventing the wheel is partly where I derive my joy :p
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Ryan Flowers W7RLF
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That¡¯s very useful information, Mikael! Thanks for sharing it! I¡¯ve ordered some of the balloons (the 36 inch ones). I wonder, do you fill the balloon bit by bit, and then try the floatation after every small fill? As attaching some kind of hose to the balloon will probably not work, the weight of the hose spoiling things. I assume in the meantime, inbetween the fills and until the correct amount of helium has been reached, the ¡°valve¡± of the balloon will keep the helium in. What if you put in just too much helium, will it be easy to release some? Then when it¡¯s filled with the correct amount of helium I understand you seal the filling hole with drops of super glue. ? I also would like to order these solar cells ? https://nl.aliexpress.com/item/100pcs-52x19mm-solar-cell-for-DIY-solar-panel-DIY-cell-phone-charging-Free-shipping/32283633274.html?spm=2114.13010608.0.0.qrQICu ? but I don¡¯t know which size to choose (the other available sizes are on that page as well). I prefer not to saw or break them to another size. What size do you recommend? What size solar cells do you use yourself on the BSS flights? ? I hope discussing these things on the QRP Labs forum is ok. Other future U3B or U3S balloonists might find it of interest as well. If Hans or members find all this not within the scope of this forum, let me know and I¡¯ll try to find another form of communicatons. ? Thanks again and best 73 ? Michael PA7MDJ ?
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Van: [email protected] [mailto:[email protected]] Namens Mikael Dagman
Verzonden: donderdag 12 oktober 2017 22:48
Aan: [email protected]
Onderwerp: Re: [QRPLabs] BSS12 ? Here is the link for the balloons,?
Yes, you have it alomst correct, but insted of hanging the tracker from the balloon I take a piece of scrap wire with the weight of the tracker/solarcells/antenna, lets say 10gram and ad 3g for free lift, I just tape the 13gram wire to the balloon and start filling untill it gets of the floor, I have prepared a 0,5gram of small wire that I also tape to the balloon and just make sure that when the 0,5gram wire is on it just baerly rises up after I push it down. I put 1-2 drops of super glue in the filling hole when I?m done to seal it.
Yes, giving it too much free lift will increase the chance of the balloon bursting.
free lift, weight of payload and the size of the balloon is the limiting factors for altitude, putting just the right amount of free lift in that will also streach the balloon making it go higher but not to much so it bursts.
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Dit e-mailbericht is gecontroleerd op virussen met Avast antivirussoftware.
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All info on my blog :.
73 John PD7MAA
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Shack clock kit arrived; not working though
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Very good. Hope it goes well D
On 14 Oct 2017 8:56 am, "John PD7MAA" < pd7maa@...> wrote: The origional buttons were not used .
I had 2 extended push buttons in stock as wel as some cheap plastic potentiometers. The shafts were cut of and appeared to be hollow.
A 1/8 ( 3mm) drill was used to enlarge the shaft inside for aprx. 2mm deep
Next the shaft was pushed over the button¡¯s shaft and fixed with superglue.
73 John PD7MAA
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The origional buttons were not used .
I had 2 extended push buttons in stock as wel as some cheap plastic potentiometers. The shafts were cut of and appeared to be hollow.
A 1/8 ( 3mm) drill was used to enlarge the shaft inside for aprx. 2mm deep
Next the shaft was pushed over the button¡¯s shaft and fixed with superglue.
73 John PD7MAA
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How did you pull the push buttons out? David G4YVM
On 14 Oct 2017 4:21 am, "wb8yyy via Groups.Io" <wb8yyy= [email protected]> wrote: Wes
Far from perfect, but I went plastic.? A black low profile multi CD case was spotted, a freebee from a conference advertiser. Easy to machine the display opening, and a generous top panel.? Explore what you might have there, or at low cost stores.?
Curt
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Re: Ultimate LPF Switch Kit- partial build?
Hi Ryan?
FYI they aren't zener diodes. Just ordinary 1N4148.
No harm in not fitting all the parts! That should all be fine.
Be careful with the jumpers. The recommended construction has LPF #1 always in circuit. The highest frequency LPF should be #1. Lower frequency bands signals are routed through their own relay as well as #1.
73 Hans G0UPL? ?
On Oct 14, 2017 8:21 AM, "Ryan Flowers" < geocrasher@...> wrote: I only want to use 3 out of the 5 bands on the board. In fact I'll probably only use two of them- the one on the U3s and two on the LPF switch. Do I need to install all the parts? I raided two of the the zener diodes for something else LOL. Hoping I can just not worry about it since I only installed 3 relays and 3 sets of sockets. Thanks!
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Ryan Flowers W7RLF
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Arduino Shield Kit for WSPR: Timekeeping questions
Hello All, I am building the arduino shield kit for use as a WSPR transmitter, and I have a question about timekeeping. Now clearly, the GPS kit is great and preferred for many reasons. In addition to providing time and location it also provides frequency drift correction. But what if one doesn't actually care about those things, and only wants the? time to be accurate. There are several methods of adding a RTC to the arduino- is there any reason one of these clocks would not provide enough stability to run WSPR for weeks or months on end?? And yes I know all the arguments about not reinventing the wheel, but I can't help that reinventing the wheel is partly where I derive my joy :p -- Ryan Flowers W7RLF
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Ultimate LPF Switch Kit- partial build?
I only want to use 3 out of the 5 bands on the board. In fact I'll probably only use two of them- the one on the U3s and two on the LPF switch. Do I need to install all the parts? I raided two of the the zener diodes for something else LOL. Hoping I can just not worry about it since I only installed 3 relays and 3 sets of sockets. Thanks! -- Ryan Flowers W7RLF
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Re: QCX transceiver. hole layout for case installation
Pinvise?
Good Luck.
73 John PD7MAA
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Re: QCX transceiver. hole layout for case installation
I used the PCB and a pin vice to mark the holes , see my blog
The origional BNC connector is not used .
Good luck
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I have searched and read through the board and cannot seem to find an answer. So..I just assembled my U3S and started it up. The diagnostic screen comes on and after I press the left button, I see the startup screen then immediately get Error: Si5351A. I have looked over all of my boards for solder joints that are bad, fixed those "bridges" I found. Someone please help me.
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Re: Approvals for 630/2200m operation are now being received
Received mine via email earlier today also.
Tim KB2MFS
On Oct 13, 2017 4:06 PM, "John AE5X" < ae5x@...> wrote: Many US hams who sent their notification of intent to operate are now receiving approvals. Got mine a while ago and will be working on an antenna this weekend.
U3S + 80-to-630m transverter
U3S + 950kHz-to-475kHz amp/transverter
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QCX transceiver. hole layout for case installation
Anybody made a template for this? ?Tnx 72 George/W2BPI
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Wes
Far from perfect, but I went plastic.? A black low profile multi CD case was spotted, a freebee from a conference advertiser. Easy to machine the display opening, and a generous top panel.? Explore what you might have there, or at low cost stores.?
Curt
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My QCX package arrived today #11611
Dear Hans and group, ? My QCX, GPS, and dummy load arrived today.?? Got some work to do next week My box Number 11611 ? Take care and have a great day. ? 73 Dave Hassall WA5DJJ? Las Cruces, New Mexico Website: http://www.zianet.com/dhassall/ ?
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Re: Approvals for 630/2200m operation are now being received
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Re: Approvals for 630/2200m operation are now being received
got mine via email earlier today¡
bests
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On Oct 13, 2017, at 4:22 PM, N3IZN via Groups.Io < N3IZN@...> wrote:
How did you get it? Email? Sent from AOL Mobile Mail -----Original Message----- From: John AE5X < ae5x@...> To: QRPLabs < [email protected]> Sent: Fri, Oct 13, 2017 02:07 PM Subject: [QRPLabs] Approvals for 630/2200m operation are now being received
Many US hams who sent their notification of intent to operate are now receiving approvals. Got mine a while ago and will be working on an antenna this weekend.
U3S + 80-to-630m transverter
U3S + 950kHz-to-475kHz amp/transverter
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John PD7MAA
David Perry
KQ8B, Robert