Binatone Walkie Talkie antenna modification

English- German description, Google translation, video text only in English! Thank you. Dankeschön!.
Pay attention to the legal regulations of your country!
Hello radio friends.
How can I improve the range of a simple 70cm Binatone PMR Walkie Talkie without interfering with the device? Here's the example of Binatone I want to show you this. In principle, we only need to make a simple field strength meter for Lambda 70cm / 446MHz and some copper wire for a new antenna.
Assuming an optimal adjustment of lambda ¼ at 70cm wavelength, the antenna of the Walkie Talkies results in an antenna length of 16-17cm. Inductively coupled here without removing the binatone antenna.
joe
Beachte die gesetzlichen Bestimmungen Deines Landes!
Hallo zusammen.
Wie kann ich die Reichweite eines einfachen 70cm PMR- Walkie- Talkies verbessern ohne in das Gerät einzugreifen? Hier am Beispiel Binatone will ich euch das zeigen. Prinzipiell brauchen wir dazu nur einen einfachen Feldstärkemesser für Lambda 70cm / 446MHz basteln und etwas Kupferdraht für eine neue Antenne.
Geht man von einer optimalen Anpassung von Lambda ¼ bei 70cm Wellenlänge aus, so ergibt sich für die Antenne des Walkie Talkies eine Antennenlänge von 16- 17 cm. Hier induktiv gekoppelt ohne die Binatone Antenne zu entfernen.
joe
******* Über diesen Kanal / About this channel *******
Dieser Kanal dient hauptsächlich um weitergehende Informationen auf weitere Seiten zu verlinken. Es geht hier nicht um eine ausgefeilte Internetpräsenz. Videos werden gesetzt, um anschauliche Informationen zu präsentieren und ein Verstehen der gezeigten Zusammenhänge, dem interessierten Publikum, visuell nahe zu bringen. Also keine Form von Selbstdarstellung und ausgefeilter Videopräsenz auf YT.
Trotzdem,... schön das dies in dieser unkomplizierten Form im www. möglich ist.
Technikgeschichte und das experimentelle Nachvollziehen schon fast vergessener elementarer Grundschaltungen und deren Bauteile ist meine Faszination.
******* Wichtiger Hinweis / Important Notice *******
Das Nachahmen der gezeigten Versuche geschieht auf eigene Gefahr. Sie stellen keine Anleitung dar und ersetzen keine professionelle Ausbildung. Jeder arbeitet auf eigene Gefahr und ist für die eigene Sicherheit und die der Mitmenschen verantwortlich. Ich übernehme keinerlei Haftung für alles.
joe 08 / 2018
Google translation:
******* About this channel / Über diesen Kanal *******
This channel is mainly used to link further information to other sites. This is not about a sophisticated internet presence. Videos are set to present descriptive information and to bring an understanding of the connections shown, the interested public, visually. So no form of self-expression and sophisticated video presence on YT.
Nevertheless, ... nice this in this uncomplicated form in the www. is possible.
History of technology and the experimental understanding of already almost forgotten elementary basic circuits and their components is my fascination.
******* Important Notice / Wichtiger Hinweis *******
The imitation of the experiments shown is at your own risk. They are not an absolute guide and do not replace professional training. Everyone has their own way of achieving the same result. Everyone works at their own risk. Everyone is responsible for their own safety and that of their fellow human beings. I assume no liability for everything.
joe 08 / 2018

[@mensagemii744]

16,5 cm very well ! 100% over the original. I conect direct on radio - it is best.

[@Urlaubaer84]

Sehr interessant Sehr tolles Video Abo ist raus freu mich auf mehr 😀

[@joeberesf7087]

Danke, z.Zt. mache ich leider sehr wenig. Mir fehlt die Zeit, da ich noch andere Steckenpferde habe. Also... nicht entäuscht sein.. wenn hier wenig los ist. joe

[@jensteret8026]

Schön anzusehen, nicht überdreht. Wie baut man das testgerät nach, schaltung ist gut verständlich aber Schottky u wo ein kristall? Versteht nicht jeder. VG

[@mrbeach3379]

Hi do you leave the original coil of antenna wire inside the aerial or do you remove it with this mod, looks a good mod and something i will try, thanks for posting this.

[@javilarg]

3:19

[@d.d.6876]

Hi, with this change how much does the distance range increase?

[@faustas4517]

Can i use Aluminium fat wire

[@Pipi69420ggwp]

I tworks tnx alot, great vid

[@joeberesf7087]

Thank you. Videos should us motivate to make experiments and DIY. Of course you have to find your own ways and most of the time there are even better solutions. It depends from the devices. Some can not be improved. Do not expect miracles ... and remember, twice the range requires four times the power. joe

[@TheForla]

Congratulations, I wanted to know if the original antenna remained inside? thanks

[@javilarg]

It remains inside, untouched

[@M4CHINE69]

Hi there I have some walkie talkies there 40mhz and I was wondering if you can convert it to 27mhz cause I wanna listen to cb radio, I opened up the walkie talkie and there’s a small screw to adjust is that to change the frequency or am I wrong.

[@joeberesf7087]

Hello Yolo 666, this is not going to work. The small setting screw (trimmer) is intended for frequency adjustment to 40MHz. A reduction of the frequency by 13MHz to 27MHz is not possible. There are inexpensive CB devices, for example on eBay and in electronik- shops. That would be the better way. If you turn the screw, the factory setting may change and the unit may not function optimally. Best regards joe

[@M4CHINE69]

joe Beresf ok thx jus wondering, anyway does anyone go on the 40mhz band or is it dead.

[@joeberesf7087]

Short Range Devices (SRD) is not so popular in Europe. This frequency band is more reserved for remote controls, baby monitors, etc. Check here www.db9ja.de/bandplan-jedermannfunk.html#SRD_40MHzSorry, only in German....I hope I was able to help you.joe

[@MysLed]

Is it not possible to just try to straighten the coiled antenna already included in a walkie talkie?

[@joeberesf7087]

If the antenna is changed, the operating license of the walkie-talkie goes out. I did not want to show that ... the original antenna should not be changed! But you're right, you could pull this spiral antenna to a straight line. Here d x pi x wdg = 35cm. and cut to 16.5cm. That shows the best result. The antenna is made of very thin spring wire ... that looks stupid. It is better to disassemble and replace with a straight wire. Then you always have the original spiral antenna. joe

[@macanalista]

Hi, what happens if the antenna is replaced with a telescopic one (like the radio transistor one)?

[@joeberesf7087]

Yes, that's perfect! To try out the telescope can be set exactly. Range between 15-17cm. Lambda 1/4. But the operating permit and warranty, etc ... then goes out, is clear! joe

[@mensagemii744]

Maintain 16,5 cm. Solder direct in radio.

[@Pipi69420ggwp]

So you can just solder a telescopick antenna ( i know the law ) but it would work beter ?

[@lol-mc3be]

wtf is your spelling

[@techtinkerin]

Bang a 1/2 wave copper wire on it, can't get much better❤️😊

[@MHEletronic]

Jawollja,, so gehts auch, gut gemacht. Bliebe noch ein Reichweitentest auf offener Strecke. 73, Mike

[@joeberesf7087]

Hallo Mike, bei 70cm alles eine Frage der Höhe über Ground und freier Sicht. Nach G- Maps waren es 7,2km. Es wäre noch ein bisschen mehr drin gewesen, da ein Hindernis (Wohnblock) die Luftlinie eintrübte...ha,ha... Ich denke 10km könnte man schaffen. 73, joe

[@LinuxUsersonly]

Could you add a bnc adapter to the copper and connect a proper aerial ?

[@joeberesf7087]

Hi Linux, so sorry for the late reply. I am not sure about the BNC- impedance of 50Ohm or 75Ohm at 70cm wavelength. Better is to try out an original SMA 70cm female Antenna to screw. Check www. Think about the right socket (male). If you want to try out BNC- connectors, so is in my opinion a 50Ohms connection better. 73, joe

[@joeberesf7087]

here you can see an original 70cm antenna in the Morserino- project. theradioboard.com/rb/viewtopic.php?f=8&t=8857 May be also interesting for you. Documentation in English and German. 73, joe

[@LinuxUsersonly]

joe Beresf i ended up buying a baofeng which allows you to remove aerial and use long range ones from eBay

[@RKurtzweil68]

Does the copper wire have to be bent at the tip or can it just remain straight?

[@-_______________________.___]

Doesn't effect the performance at all. It's so it doesn't poke someone's eye out

[@grahamrdyer6322]

I used a 1n34a with a 100 micro amp meter, it's very sensitive..

[@joeberesf7087]

Hi Graham, yes 100uA- meter is perfectly. .... But try one time a schottkydiode BAT15. In my results schottky low capacitive was better than standard Germanium 1N34. Give a reply. Thanks and best wishes.. joe

[@SqueekyBums]

With this music, I keep expecting a bearded guy with flares to appear with a girl in a mini skirt before gettin' jiggy.... 😋

[@shemmo]

It is sort of helical / helix antena, coupled with built in helical ant. I did some calculations and testing, best is if you cut 2mm thick electrical copper wire of 675 mm (1 lambda), bend 90deg. right in the middle and wind (left turns) the first half (half lamba). There must be even distance between pithes of 1/2 the diameter. The best results are with diameter of around 3/4 lamba, but you wont be able to wrap it around the existing antenna... i had good results with aluminum pipe 336 mm long attached parallel to the antenna

[@shemmo]

Helical antenna if properly built has some advantages over straight antenna eg. circular polarization

[@JLR10248]

👌🏽

[@koningbolo4700]

I have a set of Topcom Twintalker 1300's which have a equally short antenna. The antenna casing is shaped not as a rod or a cylinder but more of a flattened and tapered stub. I could make a coil which fits the Twintalker antenna case but I wonder does the changing winding diameter and the flattened shape make a negative impact on the function... An example of a Twintalker 1300: kzbin.info/www/bejne/qIDWiHuGacefp80 Thank you / Danke schön...

[@JpChannelOne]

Klasse gemacht. Daumen hoch!

[@joeberesf7087]

Schön, dass es dir gefällt! Danke und Gruß joe

[@iainet]

I wonder what the SWR is!

[@joeberesf7087]

Hi iainet, PMR not SWR. PMR is the shortform for Personal Mobile Radio, Private Mobile Radio or Professional Mobile Radio), is (in Germany since 1999) a public radio application to which the UHF frequency range 446.000-446.200 MHz is assigned. PMR446 is the European equivalent of the American FRS, short for Family Radio Service. The frequency is license-free ... so without an amateur radio license and is therefore used for such devices. All the best joe

[@iainet]

SWR = Standing Wave Ratio. A unit of measurement used to determine the ratio of power that is reflected back down the antenna lead from the antenna.

[@joeberesf7087]

ahh ...., now I understand. In German "Stehwellenverhältnis (SWV)". I think that the adaptation of the original antenna is already optimal. Due to the structure, however, in part acts like an extension inductance and not all of the energy is radiated. With professional equipment (SWR - Meter) can assess such a modification much better and even measure it correctly. Only a qualitative improvement could be determined with my simple construction. Thanks and regards joe