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Re: Which rx antenna to try first?
Hi Jeff
Of notmuch use i am afraid..looking for proper construction details, sizes, matching transformer details, etc..
Once found will add to my collection and read all, and formulate a plan of action¡it looks very promising indeed, but so far lankford array is in the lead due to ease of deployment in time allowed vs performance vs possible space. But the lakford verticals ( would use fibreglass poles) could easy be converted into it if not happy with..
Simon
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Re: Which rx antenna to try first?
Martin,
yes, you are right, a typical Mini Whip has about 15..18 dB less than a comparable dipol.
But that doesn't make it a bad antenna. If installed correctly like shown here:
... it is well suitable for RX DX and as a non-directional antenna it can be used as reference for additional directional antennas.
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Re: Which rx antenna to try first?
Hi Mike
Interesting,not too big .. but can¡¯t find any construction details anywhere, lots of tests, but no dimensions, etc..
Any ideas where to find??
Simon
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Re: Which rx antenna to try first?
Simon, try a switchable DHDL. Much less space than a full wavelength beverage but has as good a RDF. I installed two switchable for four directions. less complicated than a four square. You can get the design of the Internet. I think the fellow who came up with the design is Wallner.
Hi Dirk
No that i have ever tried one, but not convinced.. I am looking for long haul dx rx antennas with switchable directions..
Beverages would be ideal, but I doubt will have the space..
lankford vertical array is the way i am heading..
Though putting up an e probe will be easy enough.( one can never have enough rx antennas! )
Simon
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Re: Which rx antenna to try first?
On Sat, Jan 29, 2022 at 09:03 AM, Dirk wrote:
A simple active E-field antenna = Mini Whip on a 10m mast will do.
Not really, at least in my experience. It's an adequate antenna, but I've built and used several in a quiet rural location and they were all about 10 to 15dB worse in terms of Signal to Noise than my best antenna in use at at the time, which was a broadband vertical that outperformed just about everything. You reach a point where the only way to improve reception any further is to use some form of directional array, in order to reject unwanted noise off axis, and provide gain in the required direction, which is what Simon is looking for. Even broadband active loops can outperform E-Filed antennas in this respect. Try comparing them on my KiWi web sdr in a typical urban location. Antennas 3 & 4 are basically E-Probe antennas. Antennas 5,6 & 7 are 1m Broadband loops. Regards, Martin
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Re: Wellgood V3 Loop amplifier
Do you have a link to "the new Wellgood V3 PCB" boards? In general the Wellgood circuit works very well. It is my favorite loop amp. And I have tried many different types.
Tom
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Re: Which rx antenna to try first?
Hi Dirk
No that i have ever tried one, but not convinced.. I am looking for long haul dx rx antennas with switchable directions..
Beverages would be ideal, but I doubt will have the space..
lankford vertical array is the way i am heading..
Though putting up an e probe will be easy enough.( one can never have enough rx antennas! )
Simon
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Re: Which rx antenna to try first?
(Separate) RX antenna from 160 to 40m in the countryside with much place outside?
A simple active E-field antenna = Mini Whip on a 10m mast will do.
My recommendation is the PA0NHC improved version:
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Wellgood V3 Loop amplifier
Has anyone purchased or tested the new Wellgood V3 PCB boards?
How do they perform?
Henry
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You want to see how bad that topic can get? Go to QRZ.com and search for any of the (probably) 1000 threads on grounding and the NEC requirements. It is a hoot.?
And on the original topic: If we had to pay royalties or licensing fees because we took a design published on the internet and had some jobber run 25 boards for us? - I would be in debt to Mark Connelly,? WA1ION long after I die.
c
On Thursday, January 27, 2022, 07:53:52 PM EST, Jeff Green <jeff.l.green1970@...> wrote:
You should see the emails I received for my inane off topic posts on coaxial cable and meeting US NEC antenna grounding requirements. They are a dozy.?
I think I've learned to ignore the troll I've upset. I figure unless the group owner lets me know I've crossed the line, I will not worry.
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Re: Which rx antenna to try first?
I have a homebrew K9AY loop not in a ideal location. Located close to a creek.
Works great for certain stations.
Not always though but best to have many rx antennas. I also have 3 Beverages from 300' to 450' and one 580'.
They all work well for certain situations.
Fred KB4QZH
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Jeff,
You owe me nothing, it is public knowledge make?all of them you want. I haven¡¯t built one in the last two years, although I still have a few boards left.?
On Thursday, January 27, 2022, 5:31 PM, Jeff Green <Jeff.L.Green1970@...> wrote: I received an email from a throwaway account accusing me of ripping off?Everett Sharp N4CY by having a local build a clone of his modified "Modified M0AYF Loop Amplifier" instead of buying one from Mr. Sharp.
?
The plans are readily available at
https://wiki.radioreference.com/images/0/0d/Modified_M0AYF_Loop_Amplifier.pdf
?
I'm sorry if I've stepped on Mr, Sharp toes.
?
Since there was no copyright or patent pending claim, the local guy assumed it was OK to copy.
?
If I owe Mr. Sharp a license fee, I'll be happy to pay a reasonable amount.
?
I thought radio and this group were about listening to radio and having fun and I'm sorry if my quirky sense of humor has offended anyone.
?
I'll try to be more serious and stay on topic in the future.
?
I plan (or hope) to install them Monday, if we don't get an ice and or heavy snow this weekend.
?
BTW, one of the loops is zip tied to the pole that holds a Martin house and with a simple 20 inch loop of 6 AWG wire. I'll add change out to 1" CATV hard line over the weekend.
?
So far, so good, the antenna is amazingly quiet yet offers amazingly good reception of several NDBs.
?
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I just wouldn't sweat it too much. That sounds ridiculous. c
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Re: Which rx antenna to try first?
no it is not a felony:) you still have to build the ones from DX engineering. you just don't have to build the baluns and other things. I have shifted my interests (governed by the time available to me) to airtime rather than constructing the antennas literally from scratch. I'm not knocking?it. it is very rewarding. I dont have the time for it.?
Mike AB4KJ
?
Is it a misdemeanor or serious felony to go with store bought antennas?
I lack the skill to construct Lankford Norton or DX Engineering RF amps, so I paid someone else to assemble them.
?
I looked at building a UHF TV antenna but chickened out because we needed to be able to watch the local news and weather "RFN" so I bought a commercial antenna and did a temporary installation.
[old camera tripod on the patio with the coax routed under a window with pipe insulation to seal against the cold.]
?
Is this a mere crime or is my soul in mortal danger?
?
If the later, how do I repent?
?
I do plan on erecting a ~130 foot random wire antenna when the weather moderates.
?
Will that save me from the fires of perdition?
?
Or, does driving 3 ground rods, mounting the fishing rods and amps, connecting the antennas to the amps and the coax to the amps and stringing out half frozen coax in 3 inches of snow when it's 12F (-11C) mitigate my "sins?"
?
At my skill level I can either buy or do without. I hope to build my skill set(s) so I can actually construct at least simple projects.
?
And I did change an AC outlet without electrocuting myself or setting the house afire. But I cheated, we opened the master breaker and my wife and daughter held flashlights (electric torches to Brits) while I did the change. I was so relieved when the little plug in AC outlet tester said "OK."
?
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Re: Which rx antenna to try first?
Hi Jeff
If you are going out in the snow to play aerials then all sins are squashed..lol
Yes beverages..300 foot will work on 160?
Even though the garden will be big, it won¡¯t be USA big! Just Uk big..( which in reality is not that big..hopefully 1/3-1/2 acre..)
The beverage will be an easy option to try if space allows..
Simon
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Re: Which rx antenna to try first?
As far easy antenna Beverage is a winner.
Even as short as 300' are useful.
Fred KB4QZH
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Re: AM frontend overload?
Yes. Once I start running Kiwi, I suddenly aware of noises. I have replaced all the switching power supply in the building and taking some other approach to reduce noises. My Kiwi is in a grounded metal shelves. I changed USB cables for leaking noises. I do have to still house my MMDVM board and Raspberry pi in the same shelves. So I think that's a noise source. Also, the location is still close to power transmission line. That I can't solve.
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Re: Which rx antenna to try first?
Hi all
I won¡¯t be buying any antennas..
All will be homebrew .it¡¯s illegal for a ham to buy antennas lol! ( or amps)
If i have a suitable mount to raise a 4 direction k9ay that may be the way i go..but ¡.
or lankford verticals, Which would be easier to do! (3 of, but that will mean reworking the Lz1aq delay line/switching directions box ( its set for 100r as uses cat5e..but thinking about it, easy to make 50:100r transformer in lankford amps.)
Anyone have the polar pattern for phased lankford verticals? Ie any good at 30 or less degrees to horizontal ( long haul dx on 160-80m)
Has anyone fone a comparison between k9ay¡¯s and PHASED lankford verticals?
Everett, do you have any lankford amp pcb¡¯s? ( bare or populated) And willing to send to Uk?
I need to have them made made before move..
Simon
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Re: Which rx antenna to try first?
Mike,
If you want a low cost RX antenna the Lankford Low Noise Vertical is better than an active vertical, of any kind. I have 2 of them 200¡¯ apart and a Lankford Phaser #2 and it is a great setup.
Here is a link to my version of the LNV. ?https://app.box.com/s/ntqpc8kyh5t71o4en9e7df6g0ah63cgo
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On Jan 26, 2022, at 6:56 AM, Mike Irizarry <michael.irizarry29@...> wrote:
? Simon, if you have the space:
8 circle array-DX engineering sells two different kits. very powerful lowband?RX antenna. 4 square array Dx engineering sells two different kits. couple of dB down on the 8 circle but still powerful. this is what I use. 500 foot or longer beverages-DX has several different models. 250 foot beverage on ground -dx engineering has kits.? K9ay loop- array solutions?used to sell but I think you have to homebrew now.?
I have ranked the antennas by RDF and complexity.
My K9AY has been the most rugged for me through many winters and deer seasons. The BOGs are the simplest. The arrays are the coolest but the most complicated. Hope this helps.
PS several other I have tried with good results and pretty simple: DHDL loops. pennants.? Dx engineering has low noise short phased verticals you can buy. if you feed two into a phase shift (lankford style or some other) you can get decent performance?in a couple of directions. put a third up and you can get 4 directions.
Mike
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Re: Which rx antenna to try first?
Simon, if you have the space:
8 circle array-DX engineering sells two different kits. very powerful lowband?RX antenna. 4 square array Dx engineering sells two different kits. couple of dB down on the 8 circle but still powerful. this is what I use. 500 foot or longer beverages-DX has several different models. 250 foot beverage on ground -dx engineering has kits.? K9ay loop- array solutions?used to sell but I think you have to homebrew now.?
I have ranked the antennas by RDF and complexity.
My K9AY has been the most rugged for me through many winters and deer seasons. The BOGs are the simplest. The arrays are the coolest but the most complicated. Hope this helps.
PS several other I have tried with good results and pretty simple: DHDL loops. pennants.? Dx engineering has low noise short phased verticals you can buy. if you feed two into a phase shift (lankford style or some other) you can get decent performance?in a couple of directions. put a third up and you can get 4 directions.
Mike
hi
moving to countryside this year, about September, so not much time to set up rx antennas for 160-40m for the winter season, especially considering i will be also erecting a 20m vertical ( along with ground works, 60 odd radials etc) plus doing ?up the house to Wifes satisfaction!!( very important!!)
Dx tx will now become a big vertical ( inverted L, top hat loaded etc not decided untill have the place and can see best way to go,) ?against many radials, the big mag loop will be re used for inter Europe and UK.( assuming we not all dead due to ww3)
moving will come ?with a large garden ( maybe even farmers fields, but for now lets assume no fields for beverages.) but atleast 1/3 area of ?antenna land! ( compared to my 5 by 8 m plot now!)?
i have a few options..main goal is dx on 160rx..ie atleast hearing USA ?well from sw England. ( tx is easy even from ?here on the mag loop ssb) 160m.)?
k9ay or k9ay¡¯s ( if enough space for 2 crossed)
ewe or 2?
Phased crossed parallel loops ( have a Lz1aq remote delay line switching box)?
Phased cardioid loops ( have a Lz1aq remote switching delay line box)?
phased lankford verticals..?
having not tried any of the above in a quiet rf noise area I have no idea which will perform better for low angle elevation ?dx.
i know the cardioid loops work ( got ?some here in London, but a single one is not good enough for reliable long haul dx, maybe 2 phased are, same for crossed parallel loops)?
never tried k9ay or ewe as no space here.
time is an issue..will not have long to do this before winter sets in..
have already acquired the 20m ali vertical, made ground mounts etc, so now getting together the rx antenna ¡° stuff¡±?
anyone have a sensible input into what to try??
Thanks for reading g0zen?
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Dirk
Everett N4CY