Build and test a PA0RDT MINI WHIP antenna. The tiny great solution for LW, MW and SW listening.

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Electronics Old and New by M Caldeira

Electronics Old and New by M Caldeira

5 жыл бұрын

Mini Whip antenna building and testing. Great solution for LW, MW and SW.
The quest for perfect reception with a small size antenna is by means new, and will probably exist for as long as we try to capture radio waves.
In my Tube Radio restoration hobby, I always need to test the restored receivers, so a good antenna is crucial. I resorted to the tried and true longwire antenna - which was actually not bad for most purposes - but always wished for something more compact and 'magical'.
I found it - the mini whip by PA0RDT. Quite honestly, at first I doubted that it would work as promised, hence my putting it off for months, but I'm very happy with the results.
Have a look at the video and decide for yourself. You have very little to lose, and a heck of a lot to gain.
All info here:
dl1dbc.net/SAQ/miniwhip.html
If you wish to order a unit, contact the original maker, Roelof Bakker (PA0RDT) via email (link below)
roelof@ndb.demon.nl
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Пікірлер: 113
@bradcdavis00
@bradcdavis00 2 жыл бұрын
I am just learning about the mini-whip and was first introduced to it performance while listening to Wide-band WebSDR in Enschede the Netherlands. I need a better antenna than my current 80-foot wire for my SDR and old FRG-7700 to pick up LW and SW signals. Thanks you so much for posting this informative video.
@electronicsoldandnew
@electronicsoldandnew 2 жыл бұрын
my pleasure
@Derrick6162
@Derrick6162 6 ай бұрын
Excellent review and demonstration. I have been researching for a better amp, and now I am sold. I have parts on hand, so after church Sunday, I hit the bench to scratch build the PA0RDT mini whip. Thanks so much, 73.
@electronicsoldandnew
@electronicsoldandnew 6 ай бұрын
👍 good luck
@AJMjazz
@AJMjazz 5 жыл бұрын
Nice vlog on the mini whip. I know what my next project will be! Thank you.
@migsvensurfing6310
@migsvensurfing6310 5 жыл бұрын
Thanks. Yes these work wonders on lower bands. Nice video.
@alfredneumann4692
@alfredneumann4692 5 жыл бұрын
Thank you for the introduction. Now i have a little clue, whats going on with 'Mini Whip'. Wish the best holy days to you and yours and thank you for the many videos you spend to us. Cheerio from Germany.
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Alfred Neumann : you are most welcome. Have a great holiday season. Regards from Madeira.
@zorka4098
@zorka4098 5 жыл бұрын
I agree that you are indeed psychic. I have been looking at the mini-whip for some time and your video gives a clear detailed explanation of how it works for one particular person. Thanks for providing.
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
You’re welcome.
@sincerelyyours7538
@sincerelyyours7538 5 жыл бұрын
I have an all SMD version from the UK. Looks simple enough to build, once I get a video magnifier set up so I can see the tiny 0602 parts. This will be a terrific year-end project for me, thanks for the review and construction details. Happy Holidays to you and yours from Japan!
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Have fun. You really need magnification for those little guys. Happy holidays from Madeira.
@phildelfosse8085
@phildelfosse8085 3 жыл бұрын
I was wondering what this mini whip was while listening to several of your videos ...today KZfaq brought me here and i finally understand. Great ! Thank you Manuel.
@electronicsoldandnew
@electronicsoldandnew 3 жыл бұрын
my pleasure
@allthegearnoidea6752
@allthegearnoidea6752 4 жыл бұрын
Very very interesting. Thanks for sharing going to have to try one of the one. Best Regards Chris
@reallybadaim118
@reallybadaim118 4 жыл бұрын
Closest neighbor is a mile and a half away. No complaints yet.
@jims2667
@jims2667 5 жыл бұрын
Thanks for another excellent overview video Manuel! Like you I was a bit skeptical about the PA0RDT mini-whip. Unfortunately, in my inner-suburban location in a slight valley surrounded by lots of houses full of electrical noise, cable TV, solar inverters, and several 10kW+ AM transmitters fairly close, I haven't seen the same success - the homebrew & kit examples I've built aren't really any better than any other amplified whip. Up high, on a pole above my 3 storey block of units, the combination of a lot of near-field noise + IM/overload/splatter means that while absolute signal level is higher, they dont show any real advantage over other amplified whips, & generally have worse S/N ratio than a longwire. The other problem here is the big electrical storms every other day in summer (I think it's been 5 this week!). FET input amps, or even higher-impedance bipolar designs, stuck up high in the air here tend not to last very long 😞. Nice low-impedance dipoles or small loops work well though and dont need the active bits replaced too often 😉. Can't really criticise the design/concept as such, though - more a recognition that there's no "one size fits all" antenna. It certainly seems to work for you there, as I think I've commented before. Tip you probably already know: those little resistor-packaged chokes are pretty lossy at any frequency, and are really only good for supply decoupling/isolation. I suspect you'd get a decent improvement at the upper end of HF by replacing the inductor from patch to FET gate with a hand-wound one - say, a few turns air-wound on a 5mm-6mm former, or a couple of turns through a ferrite bead? Worth a try. Anyway, enough rambling! Merry Christmas & a Happy New Year to you and your family, and looking forward to more interesting videos in 2019!
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Hi Jim. I agree that some conditions are really taxing on our hobby. The inductor used is going to get swapped out, as you suggest. I see that the original builds don't use one at all, going straight into the gate of the FET. Might try that, actually. Merry Christmas.
@dirkk82
@dirkk82 5 жыл бұрын
ah this is fantastic, would work wonders for my MW listening on my new tube set :-) was hoping to use it with my home-brew SW sets, think i'll still give it a go ! and thanks for subbing :-D
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
dirkk82 : My pleasure.
@reallybadaim118
@reallybadaim118 4 жыл бұрын
Excellent analysis thanks for sharing
@electronicsoldandnew
@electronicsoldandnew 4 жыл бұрын
pleasure
@brijeshep
@brijeshep 4 жыл бұрын
Thank you for the review.
@electronicsoldandnew
@electronicsoldandnew 4 жыл бұрын
Brijesh E.P : my pleasure
@BKGoldDetecting
@BKGoldDetecting 2 жыл бұрын
Wow, wow... just installed a mini whip and very impressed especially on MW. One thing that surprised me as well was that I got a noticeable improvement by using a pre tuner (MFJ-956). I’ve also read that some use a 9:1 unun at the antenna end of the coax and a 1:9 unun between the coax and the radio. Something else to fiddle with :) Maybe an idea for a future “how to” video? Thanks again, I have gained so much knowledge from your videos. Regards Kevin
@electronicsoldandnew
@electronicsoldandnew 2 жыл бұрын
Good to know you’re getting great results. We never stop fiddling, do we 😊 I got to a point that I decided to stop messing around with it and just start using the thing, and have never looked back.
@RWBHere
@RWBHere 2 жыл бұрын
Thanks Manuel. That's a good result. There are Mini Whips which work from under 10kHz to above 150 MHz; all on the one active antenna, and with a fairly flat response throughout their range. So it would be interesting to know whether you've tried one of those.
@electronicsoldandnew
@electronicsoldandnew 2 жыл бұрын
No, I haven’t. This one is the only one I’ve played with.
@ianharling9569
@ianharling9569 5 жыл бұрын
Excellent demo of the mini whip...I have the kit version so I will build it at the weekend.Im quite interested in the vlf bands and this should be just what I need.73. Ian G7HFS/PA3IKH
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Have fun.
@BeautifulNorthWales-en3lx
@BeautifulNorthWales-en3lx 6 ай бұрын
Critical to ensure good height and grounding of metal pole or sheath of coax if plastic pole used. You will double the signal going from 2m to 4m up, for example.
@electronicsoldandnew
@electronicsoldandnew 6 ай бұрын
👍
@rogeriozambotto8539
@rogeriozambotto8539 3 жыл бұрын
Sensacional video! Obrigado
@electronicsoldandnew
@electronicsoldandnew 3 жыл бұрын
Prazer.
@johnwest7993
@johnwest7993 9 ай бұрын
That's still an E-field antenna. The trick is to decouple the antenna from noise sources, using ferrite over the coax and a virgin ground driven into 'quiet' soil away from the house or apartment noise sources. Grounding it to the same rod as the electrical service or other noise sources are grounded to is the absolute worst thing you can do. That just hardwires noise into the antenna system.
@GeorgeChristofi
@GeorgeChristofi 5 жыл бұрын
You must be psychic Manuel. I have been looking these last few days for omni antennas for the broadcast band and trying to remember the one you use. Looks like a project for me to build in the next couple of weeks. Happy Christmas to you and yours. George
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Hi George. Glad to be opportune :}. It’s actually very simple to build. However, the designer, Roelof Bakker, sells them fully built and tested to order. You can contact him on roelof@ndb.demon.nl From the info I have, he sells them for practically the same as you would pay just for the components. I am actually going to order one myself, as I believe a guy like this should be supported for his work, which he made available freely for all to build.
@docholliday3150
@docholliday3150 5 жыл бұрын
I ordered mine on ebay from Russia. It arrived in about 10-12 days. Have not tested it yet. I may build the next one if this one produces the desired results. Does it offer any benefit on the broadcast bands? Happy Holidays to George and M Caldeira from the USA. Doc
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Doc Holliday : it is especially good on the broadcast band, which we call Medium Wave over here. Enjoy and happy holidays.
@GeorgeChristofi
@GeorgeChristofi 5 жыл бұрын
I was actually looking at the prebuilt ones on ebay and like you say, the two rf devices alone are expensive as they have been obsolete for a while. There is a version out there using newer surface mount devices which does look good as well. There seems to be two schools of thought about the grounding needed. Some of the Dutch articles say that a well grounded mast should be used, others state that a mast of capacitive equivalence be used. I am tempted to put mine on the top of my tower above the HF tribander but I am a touch worried that the full limit rf transmitted may cause the devices to fail.
@docholliday3150
@docholliday3150 5 жыл бұрын
@@electronicsoldandnew Good to know. I'm relatively new to all this and didn't appreciate that the two were the same. I still can't remember meters vs frequency bands. It will come. I just finished restoring aHallicrafters S-38 and bought the mini-whip for that mainly. They seemed like a good match and as you both mentioned cost, I couldn't build it for much less than the one I bought. Just rounded up a power supply today and will test it this weekend. I'll report my results. Maybe make my first youtube video? Who knows. Seems like a LOT of work to produce this type of content. Great job.
@subramaniannamboothiri8365
@subramaniannamboothiri8365 Жыл бұрын
I appreciate your earnestness in bringing out the most wanted video on the leaders entertainment of the 1960's . The big name to be mentioned is pretty good surely the Telefunken bearing very sensitive and very low nois rf circuits which may be helpful for receiving very jong distance radio stations with the help of sensitive rf circuits and the sound is always impressive to hear . The most unpopular thing is that the rf range is found limited to a small range in between 16 meters and upto 49 meters ie fom 6 mhz and 18 mhz . I really interested in the full swing c9verage right from 11 m to 120 m spreader in more than 4 or 5 bands . I am not sure that thev above sw coverage why the same is limited, that i am unable to guess. I want to know mthe model of the radio model which covers the full sw coverage ? If anyone provide information ababout the models preferably ,Telefunken, or any other model which haveca sensitive rf circuit capable of receiving the full shortwave coverage ,of course with valve rf circuits Please..
@Dr_Thamminana_KR
@Dr_Thamminana_KR 4 жыл бұрын
Nice 👍
@pieciagoras
@pieciagoras 3 жыл бұрын
This radio has an antenna input not designed for 50 Ohm. Do UnUn but connect it backwards - 50 Ohm to the mini whip, and the high-impedance output to the radio. Then run the tests again!
@KA4UPW
@KA4UPW 2 жыл бұрын
What impediance is the receiver looking for, could be the long wire needs and matching network, and the mini whip preAmp provides the match and overcomes with gain
@electronicsoldandnew
@electronicsoldandnew 2 жыл бұрын
Tube radios need about 300 ohms. I tried all the available un-un options, and the miniwhip beats that, hence the choice
@texhow1
@texhow1 4 жыл бұрын
Hi, we were always told at our Manchester Radio club to always use white piping to cover aerials as the darker colours & especially black colours have carbon added which is conductive & can block signals reaching the inside antenna, I dont know if you have compaired them, I have just received one with grey tubing & was thinking of changing it to white.
@electronicsoldandnew
@electronicsoldandnew 4 жыл бұрын
The piping is pvc so I don't have a clue if carbon is used in the colouring. However, I tested this with no pipe at all and the result now is the same.
@BKGoldDetecting
@BKGoldDetecting 2 жыл бұрын
I’m just about to install a mini whip, just wondering if there is a problem putting coax directly to the antenna socket. I’m sure I read somewhere that valve radio antenna impedance is a lot higher than the 50 ohm coax.
@electronicsoldandnew
@electronicsoldandnew 2 жыл бұрын
it’s about 300 ohms, but try anyway.
@SomeRandomPerson163
@SomeRandomPerson163 4 жыл бұрын
I catching J310 self oscillation on 25 MHz until first inductance (between gate and probe) connected. Would it be OK to just don't use that inductance? Also is it matter orientation of probe and cable? I want to use it in horizontal.
@electronicsoldandnew
@electronicsoldandnew 4 жыл бұрын
If it oscillates you’ve got to add the inductor. The orientation doesn’t matte as long as it is as high as you can get it.
@tglenn3121
@tglenn3121 5 жыл бұрын
Do you have a list of the components and their placement on the board? Thanks.
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
T Glenn : check the links in the video description. It’s all explained there.
@MAGNETAR-187
@MAGNETAR-187 6 ай бұрын
I have an XHDATA Shortwave radio together witha DESHIBO GA-450 active Loop antenna. Would a whip antenna make a difference because the GA-450 antenna is also an active antenna with electric power so what i really ask is with my XHDATA d808 shortwave radio would a mini whip antenna make a difference when listening to shortwave? Or do you people think that a GA-450 active loop antenna is sufficient? Thanks for any reply and Thank you Manuel Caldeira for sharing this video 73's!
@electronicsoldandnew
@electronicsoldandnew 6 ай бұрын
I’m not sure. I think the active loop antenas are pretty good, and am actually considering building one myself to compare.
@tool2202
@tool2202 5 жыл бұрын
Hi! How were you able to make that PCB for the antenna? You covered half of the copper board when you sunk it into the ferric chloride? Or what method did u use to make that nice PCB?
@tool2202
@tool2202 5 жыл бұрын
Also, what is that inductor between the amplifier and the actual antenna (the 2 halves of the PCB), it isn't on the original schematic.
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
I did in fact cover half the board (nail varnish) and the rest by the toner transfer method. The inductor is suggested on some forums to block fm reception which could overload the input.
@tubeDude48
@tubeDude48 4 жыл бұрын
Just what I need for where I live! Thanks for covering this! Your thought at the end about higher frequencies dropping off the mini-whip. How about adding a 10-Turn POT to the power supply and very the voltage. -- Does someone have the *Gerber* *files* for this so I don't have to make the board?!
@electronicsoldandnew
@electronicsoldandnew 4 жыл бұрын
I’m afraid I don’t have a the gerbers any more. It was quite a while ago, and I have never needed to build another one as the original still works perfectly.
@Frank55
@Frank55 5 жыл бұрын
I used one, and it worked for some time. But after some thunder and lightning, the FET died... Impedance at the gate is very high and there is no protection against high voltages or a high amount of static charge in the air. (Maybe two anti-parallel diodes at the input would provide some safety?)
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Frank55 : probably would work, but not sure what it would do to the frequency response. I’ve not had that problem so far.
@stuartarundale6219
@stuartarundale6219 5 жыл бұрын
@@electronicsoldandnew Just a thought, but one could incorporate a multipole relay in the unit, that when DE-energised shorted the gate drain and source of the FET together - During an electrical storm one would only have to power the unit off to put it in 'safe' mode?
@anandarochisha
@anandarochisha 5 жыл бұрын
Ok..that's a little surprising. I wonder if it would replace my big vertical..we will have to see..
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
It certainly surprised me.
@vmvbeng
@vmvbeng 4 жыл бұрын
Sir, Can I have the circuit diagram /link of just the bias tee power unit . I plan to build it.
@electronicsoldandnew
@electronicsoldandnew 4 жыл бұрын
All the schematic information is available here: f-10255.pagesperso-orange.fr/antenne/act/miniwhip/mini.htm
@EngineeringVignettes
@EngineeringVignettes 4 жыл бұрын
Hey, hope things are going well for you on the island. Just had a question on this. I have pt one of these together and was wondering what the impedance rating of the cable you were using to get a good termination on the antenna, is it 50 ohm, 75 ohm or some other impedance? Cheers from Canada, and looking forward to more radio adventures, - Eddy
@EngineeringVignettes
@EngineeringVignettes 4 жыл бұрын
Also wanted to ask if you figured out the strange dimensions mentioned in the original article, it mentioned 30 x 150 mm but none of the designs i have seen to date ever had a patch area that large... typo?
@electronicsoldandnew
@electronicsoldandnew 4 жыл бұрын
I use 50 ohm coax cable, and it works ok. Ideally you should probably use a balun, but I haven’t bothered. I noticed those dimensions, and have also never see one as big as that. I believe that size would cause problems with very strong stations in the FM band overloading the front end of the unit.
@tgr131
@tgr131 Жыл бұрын
@@electronicsoldandnew Manuel, when you connect the mini whip to a receiver like the Zenith Royal 7000, are you just using an alligator clip from the BNC connector, or some other device? I'm getting my mini-whip this weekend and am quite confused by the impedance. It would be great if I could just connect with something like a clip and get decent performance, and then improve the connection as I learn more.
@electronicsoldandnew
@electronicsoldandnew Жыл бұрын
I simply connect with a croc clip or, in some cases, I got one of those car antena plugs that some radios have a socket for.
@tgr131
@tgr131 Жыл бұрын
@@electronicsoldandnew Manuel, I got my MiniWhip today, and set up in a test environment in less than ideal conditions, and it worked great! It seems that using a croc clip to clip it to the antenna gives a better result than clipping it to the external antenna connection on my Zenith TO 7000. Any speculation as to why that might be the case? This is true on my DX-440 as well. I was wondering if external antenna connections might have some attenuation on them? Thanks for turning me on to this!
@x_CrossHair_x
@x_CrossHair_x Жыл бұрын
Not sure what balun you are using on your "Long Wire" I had a 9:1 but switched to a 49:1.. (Wow) big diff. but that little MINI WHIP is intriguing (I also have a MLA-30+) My long wire beats it.. with the 49:1.. However my long wire does not reach down to 10KHz only 500KHz could say at best and 25 MHz max.. (Very weak above that).. I would want a MINI WHIP if it does what it claims... 73s
@electronicsoldandnew
@electronicsoldandnew Жыл бұрын
I’ve actually given up on my long-wire completely after using the mini-whip.
@Thefreakyfreek
@Thefreakyfreek Жыл бұрын
My only question is how How can it work so well I'm going to make one of those Is tere a way to make it even bigger or preform even better
@electronicsoldandnew
@electronicsoldandnew Жыл бұрын
You let me know 😊
@Thefreakyfreek
@Thefreakyfreek Жыл бұрын
@@electronicsoldandnew i try to remember to post here But I'm geusing it works by using the plate to catch to the current electric field strength and then aplefying the difrence between that and the ground or a slower adjusting plane instead of actually receiving power from the electric field So it's more of a very fast field sensor than an antenna Like a pressure sensor whit it's end capped measuring the pressure of the air rater than a microphone that has to resonate to the pressure waves
@AndrewMurphy8383
@AndrewMurphy8383 3 жыл бұрын
by the way the sdr is radio is a recive only radio
@electronicsoldandnew
@electronicsoldandnew 3 жыл бұрын
Most SDR’s are. You now get transceivers as well. The mini whip antenna is receive only.
@KayAteChef
@KayAteChef 3 жыл бұрын
Capacitively couples to the ground.
@electronicsoldandnew
@electronicsoldandnew 3 жыл бұрын
👍
@Ali-uj4gd
@Ali-uj4gd Ай бұрын
Did you ground the antenna?
@electronicsoldandnew
@electronicsoldandnew Ай бұрын
No, I didn’t and it still works really well
@DAVIDGREGORYKERR
@DAVIDGREGORYKERR 2 жыл бұрын
I wonder why a MC1350 based Mini Whip amplifier would not have worked better.
@electronicsoldandnew
@electronicsoldandnew 2 жыл бұрын
it may. build one and let us know.
@f.kharrasi4333
@f.kharrasi4333 5 жыл бұрын
Hi, have your long wire antenna have ground conection?
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
F. Kharrasi : No. Can’t getting a decent one up here on the top floor of the building.
@f.kharrasi4333
@f.kharrasi4333 5 жыл бұрын
@@electronicsoldandnew: Ok, so for this reason, your long wire antenna does not work properly.
@mohinderkaur6671
@mohinderkaur6671 4 жыл бұрын
@@f.kharrasi4333 Long wire with a 9:1 matching UN-UN transformer and a length of shielded cable may actually work better.
@BKGoldDetecting
@BKGoldDetecting 2 жыл бұрын
I was wondering the same thing, but I seem to recall on one of your videos that you sometimes install 3 pin plugs on your radios. Just thinking that with a 3 pin plug installed would the ground from the radio end up at the mini whip via the coax shielding?
@electronicsoldandnew
@electronicsoldandnew 2 жыл бұрын
Yes, it does.
@migalito1955
@migalito1955 Жыл бұрын
I am a retired mathematician that does not want to learn to the same degree studying mathematics for 12 years gave me with respect to theoretical math the complex details of other fields. Amateur radio is a retirement hobby for me but with respect to the Mini Whip I want it to be essentially plug and play. With the above in mind and adding I bought the Mini Whip pre-assembled I have noticed two things relative to your video and Mini Whip utilization. They are: (1) You added no additional wire antenna to the antenna pad. Tech Mnds and others added an additional wire of roughly 10 meters to the antenna pad. (2) You mentioned nothing with respect to grounding. Others say at minimum a counterpoise is needed and my board does have a pinout for ground. With the above in mind. I have experimented, in a horrible location aka basement, both with and without the added wire attached to the antenna pad on the Mini Whip. Strangely, it appeared to make no difference. But, where it did well was in the 41 & 49 meter bands and almost nothing compared to my mag loop antenna on the medium wave bands. There is so much information on the Mini Whip and often it's anectdotal and from non-RF engineers. Thus it's hard to pick a direction for how I will utilize my Mini Whip. As an EE I'd trust your information and while 4 years after the video I'd send you a big 73 from kc2wvb if you could give me a bit of direction to head in. Thanks RMB
@electronicsoldandnew
@electronicsoldandnew Жыл бұрын
Hi RMB I also read all I could about the system before embarking on the project, hoping to absorb all I could. What I found was that various grounding attempts made absolutely no difference to reception, so I gave up and just accepted that perhaps my particular setup was doing its job. I have the unit at about 1.5m above the roof of my apartment block (I’m on the top floor), coming down via coax straight into the supply u it. I believe the coax sleeve is probably acting as a counter-poise of sorts. Like many out there I fiddled endlessly trying to improve reception, but finally just accepted the miraculous result as is.
@migalito1955
@migalito1955 Жыл бұрын
@@electronicsoldandnew Much thanks & Merry Christmas.
@migalito1955
@migalito1955 Жыл бұрын
@@electronicsoldandnew Thanks again and I thought I'd share some of what worked well for me. I've been experimenting with my Mini Whip off and on. Initially I had really great reception on from about 4 to 8 MHz, but recently I have tried what is similar to what I used years ago and that was a Fan Dipole. Essentially I attached multiple lengthy wires to the antenna pad on the Mini Whip and that gave me better reception in the 10 and greater MHz interval than I had with a single piece of mag-wire run outdoors in an L shape roughly 15 feet above grade using a total of roughly 40 feet of wire. What really worked beautifully was adding the output from my home built Mag Loop antenna that was purpose built for the American Medium Wave broadcast band into the antenna pad and ground of the Mini Whip. Fantastic difference on the Medium Wave band. I have another Mag Loop for 80 meters and I may tie it into the Mini Whip too. Footnote: My active antenna is inside & while using the antenna without any added wire that is run to out doors worked to some degree; it was adding both wires that extend to the outdoors and a counterpoise that really made it work well at my location. The added Mag Loop and Mini Whip combination knocked my socks off by how well it paired to create a great outcome. Thanks again...
@electronicsoldandnew
@electronicsoldandnew Жыл бұрын
Thanks for your input. This little antenna can be magical.
@AverageJoe2020
@AverageJoe2020 5 жыл бұрын
Looks nice, a little brutal though?.
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
Nah. It’s actually very simple to build. However, the designer, Roelof Bakker, sells them ready made by order. You can contact him on roelof@ndb.demon.nl From the info I have, he sells them for practically the same as you would pay just for the components. I am actually going to order one myself, as I believe a guy like this should be supported for his work, which he made available freely for all to build.
@AverageJoe2020
@AverageJoe2020 5 жыл бұрын
@@electronicsoldandnew nice, I will look into, And best regards for you and yours at this festive time of year, Sam.
@jafinch78
@jafinch78 5 жыл бұрын
"Electric Field" I think and not the "Magnetic Field" from what I understand. kzfaq.info/get/bejne/fpegmbV028-VgGg.html Great video by the way! Thanks for sharing. I am about to make one of these and have been reading for a while. Interesting the methods for antenna design to detect the signals. I remember the effects of the different antennas by thinking like they are literally like components in their design and sections of circuits as antennas. Inductors are like loop antennas, magnetic loop antennas in particular and deal with magnetic field coupling. Capacitors are like old school air gap plate capacitors and the schematic also... so those deal with electric coupling since capacitors are electrolytic (not all caps are electrolytic... though is a way I remember). Charge builds up on the plates too and cycles with the AC... and those are electrons dynamically like not electrostatic... I guess unless looking at in moments in time. Might not be the most accurate method... though seems to work for me. Thanks again for sharing!
@bask2140
@bask2140 5 жыл бұрын
Your 30m long wire antenna is under the ledge of the roofing. That's not ideal and maybe repsonsible for the lesser reception caused by interference from inside your appartment.
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
D Rama : could be, but I can’t place it anywhere else in an apartment building, so it had to be that way.
@BarneyRubble54
@BarneyRubble54 3 жыл бұрын
South African accent?
@electronicsoldandnew
@electronicsoldandnew 3 жыл бұрын
Yes.
@MichaelBeeny
@MichaelBeeny 5 жыл бұрын
I thought that looks like a great project to build, better reception from all over the world. After my excitement, I thought, wait!! I can already get thousands of stations from all over the world, never fades, always available day and night, no crackle or fizz. It's called internet radio. Not a water pipe in sight.
@electronicsoldandnew
@electronicsoldandnew 5 жыл бұрын
I suppose that applies to all radio. The fun is seeing an old set brought back to like, regardless of the modern computer sitting next to it connected to broadband internet.
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