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Re: SDR radios
http://websdr.org/ ( http://websdr.org/ )?is decent, not a lot of radios but works well
By peatmoss - ki6ssi · #24982 ·
SDR radios
Which SDR websites do you use to listen to your TX? I googled a bit, but didn't find that much. Perhaps I'm looking for the wrong thing? I'd like to find out, as QSO's are very hard to get
By Dave Telling, KJ7WT · #24981 ·
Re: Antenna selection
I just assembled the qrpguys EFHW mini tuner and have about 65' of 22awg wire shot up into a tree,? I was going for cheap and easy.? I also bought the dummy load/power meter and am very happy with
By Doug W · #24980 ·
Re: BITX40 without Raduino?
Google Eamon Skelton's EI9GQ webpage for details of a Huff'nPuff stabilised VFO - and a host of other useful project concepts. Bill, VK7MX
By Bill Maxwell · #24979 ·
Re: The Users User Manual
OK. So now that the instructions have been updated, and calibrating the displayed frequency offset, spatial orientation of some parts, and the stereo jack wiring points have been talked about. I have
By John Smith · #24978 ·
Re: BITX40 without Raduino?
I am unfamiliar with this one. I have one based on the AD9850 which I used for the Forty-9er and Antenna Analyzer projects. You can see these
By Jack Purdum <econjack@...> · #24977 ·
Re: BITX40 without Raduino?
Hi Jack! Do you more info that you could share about this specific?Huff-&-Puff stabilized Vackar VFO? I'm also think this is a viable solution and searching for it in order not to reinvent the
By PY2CSH · #24976 ·
Re: Running 24VDC into IRF510. Is there a down side?
Remember that heat is the biggest enemy you have. You can't see it. You don't realize it is a problem until suddenly things go haywire. It is always present no matter how you use the rig. Always
By John Backo · #24975 ·
Re: Running 24VDC into IRF510. Is there a down side?
I would guess so; I would think that all RF finals will not be more than 50 per cent efficient, so even with a resonant antenna, current means heat.
By College Professor Simon Thompson <nwccenglishprofessor@...> · #24974 ·
Re: Running 24VDC into IRF510. Is there a down side?
Okay thanks for the advice Farhan. I will hold up on the long winded rag chew until I have my beefy heat sink and replacement finals sitting on the bench. I still think I am going to plan on my final
By John Beasley · #24973 ·
Re: Running 24VDC into IRF510. Is there a down side?
some day, you will wax eloquent about that fishing trip for 10 minutes and smoke the ol' 510! - f
By Ashhar Farhan · #24972 ·
Running 24VDC into IRF510. Is there a down side?
So i have my unit up and running on a home built a 40 Meter Dipole that is showing a completely flat SWR on my meter. I was doing some testing from here in Oregon to the WebSDR down in the bay area
By John Beasley · #24971 ·
Re: Antenna selection
Ok...it's not my antenna. The world's largest amateur antenna belongs to OH8X in Sweden (Radio Arcala)?and recently came down in a violent storm. Many amateurs want to know if it fell into Russia or
By Jack Purdum <econjack@...> · #24970 ·
Re: Antenna selection
I'm happy with the EFHW-8010 from?Danny Horvat. ?Google it. ?EHam gives it a 5.0/5 with 44 reviews. ??QST March of 2016 gave it a thumbs up too. ?Efficient over many bands, and easier to put up
By Jerry Gaffke · #24969 ·
Re: Antenna selection
I'm using a homebrew hex shaped loop, made of 15mm copper pipe. I used 6 pipes, each 1m long, and soldered them together in a hex shape. So it?s amost a circle with 1.2m diameter. On the top side I
By Allard PE1NWL · #24968 ·
Re: The Users User Manual
Well... I guess he's planning to respond by mail.
By John Smith · #24967 ·
Re: Antenna selection
i would probably find 5W adequate with an antenna like that, too!
By Dave Telling, KJ7WT · #24966 ·
Re: Antenna selection
I find my 5W adequate when I switch over to this antenna: To: [email protected] Sent: Wednesday, April 12, 2017 12:15 PM Subject: Re: [BITX20] Antenna selection The KX3 Yahoo forum always
By Jack Purdum <econjack@...> · #24965 ·
Re: Antenna selection
The KX3 Yahoo forum always has interesting conversations about how to get the most for the least in terms on antennas. It is very hard to beat a resonant dipole for efficiency and portability and
By College Professor Simon Thompson <nwccenglishprofessor@...> · #24964 ·
Re: Antenna selection
To get some idea of possible portable performance, I tried a 43 foot-long wire, driven with a 9:1 balun, and being fed with about 15 ft. of coax, and no radials. the feedpoint is about 12ft above
By Dave Telling, KJ7WT · #24963 ·