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Photos of a 30m beacon build, and a question about the oscillator frequency
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Dave Clausen
Hi All-
This week I finally put together the 30m QRSS beacon kit I bought from G0UPL at FDIM. I added a 5v linear regulator to allow operation from a 9V battery, and an LED to show keying activity, and put the whole thing in an Altoids tin. I uploaded some photos here: One issue that came up is that I had a hard time getting my oscillator frequency down to 10.140.050 MHz. Initially I couldn't get it below 10.140.220. I removed and re-wound L1 with 38 turns but that only lowered me to about 10.140.100. So I added a 10pF capacitor across C9 and that brought my min frequency down below 10.140.000 (easily raised by tuning C9). Although it seems to work fine now, I'm wondering if I might have created a problem that I'm not aware of, or if the initial high frequency was an indication of a mistake I made during the build. Any thoughts? I hope to put the beacon on the air on Friday night from my club in Brooklyn, NY. This is my first attempt at QRSS and I'm really excited to look for my signal on the grabbers tomorrow. Thanks Hans for a great kit. 72/73, Dave W2VV |
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"hanssummers2000"
Hi Dave
This week I finally put together the 30m QRSS beacon kit I bought fromWow Dave. Fine photos! Most of my photos are taken with the camera in my Nokia E90 mobile phone. Your camera is doing a much nicer job! I haven't heard of this problem before. Perhaps you just had a crystal that was some way off the normal frequency. I shouldn't think you made any mistake building, or that the remedial action you took would cause any other problem. Your "gimmick" capacitor looks long... I wonder if it will create a wide FSK much more than 5Hz. Did you measure your amount of FSK? Good luck! Let us know how it goes. 73 Hans G0UPL |
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Dave Clausen
Success! I'm QRV now and visible on ON5EX's grabber. It looks like I'm
centered at about 10.140.0010 MHz, slowly drifting down, with a shift of 4 or 5 Hz. That is about what I estimated at home using a general-purpose audio spectrometer program on my Mac. This is cool. Are there any other working grabbers online I can check? So far ON5EX's is the only one I've found that is actively updating. 72/73, Dave W2VV |
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"Paul Daulton"
开云体育Dave the W4hbk grabber in Fla and kl1x/5 in ok are
running.
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I have gotten captures from both in the last few
days.
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I will have to check the DX grabbers and see if I
can be seen. From the mid south I doubt it , but who knows.
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Good luck
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Paul Daulton K5WMS
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"hanssummers2000"
Congrats Dave! Glad you're having fun!
toggle quoted message
Show quoted text
The QRSS grabber compendium is a great place to start, for finding the grabbers. I guess you've seen it already. 0.000073 de Hans G0UPL --- In [email protected], Dave Clausen <daveclausen@...> wrote:
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"Newton White"
开云体育Good Blog post Dave. On my return from a weeks trip overseas, I replaced my
4 'C' cells in the margarine container that houses my qrss kit from FDIM. I see
my k0nwt in the screen grab you posted at about 0090. I'm about 4400 miles from
Johan's grabber - fun stuff!
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72,
k0nwt
Newt
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