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Пікірлер
@pu2allalemao886 13 күн бұрын
Qual yagi é mais eficiente, com gamma ou sem o gamma (yagi UDA) ?
@EphraimGariguez 12 күн бұрын
both are the same - gamma match is used as a matching system same function with other matching system, elements length and spacing of the antenna affects the gain of the yagi
@pu2allalemao886 12 күн бұрын
@@EphraimGariguez obrigado pela atenção. 73
@pu2allalemao886 13 күн бұрын
Please inform the length of the gamma tube and the distance from the gamma to the irradiant. I'm going to mount this antenna and the only thing missing is this detail. thanks
@EphraimGariguez 12 күн бұрын
this is the details of the gamma match, it will also work with that, dw1zws.com/building-the-gamma-match-for-3-elements-yagi/
@ElectronicsShow 13 күн бұрын
Could you please make an xls sheet for 2 ways antenna spacing calculator. Thanks
@EphraimGariguez 3 күн бұрын
Hi it is best to model it in antenna modeller to optimized your antenna spacing, for your reference you may check out this video for rule of thumb spacing. kzbin.info/www/bejne/qIGmZ2qmbcdlbKM
@ElectronicsShow 3 күн бұрын
@EphraimGariguez thanks
@ElectronicsShow 3 күн бұрын
@@EphraimGariguez it's just a two simple fm dipoles Just 2.8 meter is okay.
@EphraimGariguez 3 күн бұрын
@@ElectronicsShow 1/2 wave length spacing is fine in reference with your antenna center frequency.
@ElectronicsShow Күн бұрын
@EphraimGariguez can we dedicate the operating frequency from the length of the harness. Exemple mine is 235 Cm. What is the frequency of it. Thanks
@micahbentley141 16 күн бұрын
Tutorial?
@EphraimGariguez 16 күн бұрын
@@micahbentley141 demo it is, totally different.
@micahbentley141 16 күн бұрын
@@EphraimGariguez I was asking I u could do a tutorial
@EphraimGariguez 16 күн бұрын
@@micahbentley141 it would take too long for a video like that to be produced and may not be useful at all for most people just looking around. So I documented my process bit by bit and uploaded the video footage usually raw, I also take inspiration from other people learn from them and go on my own, as I believe that is the way to properly learn it. the inspiration for this is from KA8VIT (kzbin.info/www/bejne/hn-ag4CXiZ6AqMk) with his arduino code here: ka8vit.com/test/repeater_controller_basic_02.txt , I read on his code and translate it to schematic diagram on my FB page here: facebook.com/panda.antenna/posts/pfbid021Lgp2yY1RQh4HVqTaYYMjdFMuVcQZkAX8TBKXL7VXgodqFtJeuyMxkE6nDtjrFMpl?rdid=FbOWoztywAWE5l3W# the code is fully documented so you can start from there and build your own. Cheers and 73!
@indianna5649 25 күн бұрын
You sir are the master. Even sirio could learn somthing from you.
@johnverg6809 Ай бұрын
I cannot understand what you are saying in your video Your voice is echoing very bad in a big room
@EphraimGariguez Ай бұрын
Thanks for the feedback
@jonnathanlara6701 Ай бұрын
Llevo días buscando la solución, muchas gracias amigo, me funciono al %100
@mctoddhikvision6189 Ай бұрын
73 sir,, pwede mahingi sukat sir Tawi-Tawi area po
@EphraimGariguez Ай бұрын
@@mctoddhikvision6189 dw1zws.com/3-elements-yagi-lightweight-end-mount-antenna-by-panda-build/
@zahragondang 2 ай бұрын
Kabel yg masuk elemen kabel 75ohm bukan terimakasih kawan
@EphraimGariguez 2 ай бұрын
yes it's 75 ohms, 3/4 wavelength
@zahragondang 2 ай бұрын
@@EphraimGariguez terimakasih kawan,,,,,,,
@Don-se5mx 2 ай бұрын
Thank you so much, it worked for me on Kicad 8
@EphraimGariguez 2 ай бұрын
I'm glad it helps.
@arluavl 3 ай бұрын
Saan pwede mka bilo ng cable nyan na mag connect ng dalawang base sir?
@EphraimGariguez 3 ай бұрын
Pwede ka po gumawa na lang naka share sa website ko yung diagram para di ka mapa mahal: dw1zws.com/qyt-kt800-kt8900d-and-variants-x-band-repeater-system-interface/ gumagana lang po yan sa mga radio na nasa video.
@arluavl 3 ай бұрын
Complete guide in set up this unit, pls...may repeater mode ba na on off or relay...thanks...
@EphraimGariguez 3 ай бұрын
@@arluavl crossband repeater lang ang function nyan na pwede vhf to uhf / or uhf to vhf - madaming video sa youtube tungkol sa setup neto kaya hindi na ako gumawa ng instructional videos - regards
@W1RMD 3 ай бұрын
What is on 168 Mhz? Is this for television, business band, personal communications? Your antenna's look great. Your cat is lazy and doesn't help at all! Or is he the one who cut all the metal, and is now taking a break. Ha Ha! Take care and thanks for the video!
@EphraimGariguez 3 ай бұрын
@@W1RMD this is custom built for a client requirements for the antenna to operate on the assigned frequency. This will be used for early warning system / weather monitoring being deployed by my client.
@EphraimGariguez 3 ай бұрын
@@W1RMD by the way the cats do all the antenna modelling calculations - and most of the snacks grabbing ha ha, thanks for looking around 73!
@W1RMD 3 ай бұрын
@@EphraimGariguez Very cool! You do some great work. Take care!
@EphraimGariguez 3 ай бұрын
@@W1RMD thanks
@W1RMD 3 ай бұрын
Very nice! I like your mounting bracket. I've got parts of an old sliding aluminum frame door I will cut into that shape. A circular saw with a wood cutting blade will easily cut aluminum. I will use a jig saw with medium teeth for straight non rounded cuts. I assume that you cut the coax into an old multiple of the frequency of choice. Is this an odd multiple of wavelength for the entire section of coax, or just an odd multiple that is inserted into the element, or both? Thanks and 73.
@EphraimGariguez 3 ай бұрын
@@W1RMD hi it's odd multiple of a quater wavelength with respect to the center frequency of the dipole antenna you're building taking into account the coax velocity factor. In this build it's for 146Mhz dipole the coax is 75ohm cut into 3/4 wavelength inserted into the 3/8 (10mm) aluminum tube.
@W1RMD 3 ай бұрын
@@EphraimGariguez Does it matter how far or how much of the coax is inserted into the dipole? Do you even need to insert it at all? My coax is 50 not 75 ohms. I have RG 174 which will fit inside my 1/4 inch copper coated steel brake line that I want to use. Thanks.
@EphraimGariguez 3 ай бұрын
@W1RMD it should be 75 or 100ohm impedance coax, it should be inserted up to the other side of the folded dipole, the purpose of the coax is for impedance matching 3/4 wavelength * velocity factor. The function is similar to a parallel set of coax bringging down the impedance of a 75 /100 ohm coax to 50ohm ( impedance transformer) the aluminum tubing serves as one of the coax in parallel that is why you need to use 75 /100ohm impedance coax, not 50ohms.
@W1RMD 3 ай бұрын
@@EphraimGariguez Okay! Thanks and take care. I appreciate all of your advice.
@W1RMD 3 ай бұрын
Thanks and 73!
@THESPORTINGCAMP 4 ай бұрын
Great work Ephraim. 🤝
@EphraimGariguez 4 ай бұрын
thanks
@RATz-zTAR 4 ай бұрын
Magkanu po ganyan kahit 4 element naka tono sa 98mhz?
@EphraimGariguez 4 ай бұрын
@@RATz-zTAR 3.5K
@jekikik 4 ай бұрын
Pwede tunohin sa 145.580 sir? at magkano po?
@EphraimGariguez 4 ай бұрын
Meron po akong design for amateur band
@olaitanlabs5948 4 ай бұрын
Works so well. Ty so much. Appreciate it wholeheartly
@karheltv465 4 ай бұрын
magaling talaga tong idol q. Tinigilan q na magradyo, lagi q nasasagap ung mga lespu sa presinto sa tpat. Kainip mghanap ng free channel. Haha
@EphraimGariguez 4 ай бұрын
Boring sa mga lespu
@felixde.guzmanvaldeziii8344 4 ай бұрын
sana mapa unlakan mo sir ang kahilingan ko ...❤
@felixde.guzmanvaldeziii8344 4 ай бұрын
sir...matagal ako naka abang sa homebrew na antenna mo..sir pa share naman ang sukat at yung vedeo paano mo ginawa..umaasa...dy3fgv .nueva ecija salamat sir
@jzone_diy 4 ай бұрын
Nice lods...73's
@EphraimGariguez 4 ай бұрын
thanks bro
@nats50 4 ай бұрын
You should have checked the 460-470 band where the GMRS is at.
@EphraimGariguez 4 ай бұрын
it might work but the signal pattern may already be skewed from the intended design.
@nats50 4 ай бұрын
@EphraimGariguez OK. Cause here in the States We use GMRS frequencies, and I was thinking maybe that antenna would work here. Salamat na lang.
@EphraimGariguez 4 ай бұрын
@@nats50 dito kasi ay assigned ang 512 - 698 Mhz sa tv broadcast frequency 14-51 >>> dict.gov.ph/ictstatistics/wp-content/uploads/2019/07/PHL-Framework-for-the-DTTB-Migration-Plan.pdf
@jongsarami2180 4 ай бұрын
Pahingi kuya idol ng sukan ng gamma much
@EphraimGariguez 4 ай бұрын
parehas yan >>>dw1zws.com/building-the-gamma-match-for-4-elements-yagi/
@LawpickingLocksmith 5 ай бұрын
Congrats, very pretty
@EphraimGariguez 5 ай бұрын
Thanks
@DhruboSarker 5 ай бұрын
Cable wire pattern please. which color to which color?
@EphraimGariguez 5 ай бұрын
dw1zws.com/site/wp-content/uploads/2018/08/qytxband.pdf
@gregorymann3431 5 ай бұрын
:)
@Belgianlover1980 5 ай бұрын
Where you buy this cable?
@EphraimGariguez 5 ай бұрын
I built it myself here >>> dw1zws.com/qyt-kt800-kt8900d-and-variants-x-band-repeater-system-interface/
@706d 6 ай бұрын
Great video, thank you!
@grahamwatkins4910 7 ай бұрын
Hi what would be the expected gain for this set up please?
@EphraimGariguez 7 ай бұрын
Typically 9dB for 4 stacked inline.
@grahamwatkins4910 7 ай бұрын
@@EphraimGariguez Thank you. Your antennas always look great!
@EphraimGariguez 7 ай бұрын
@@grahamwatkins4910 thank you
@tipico01 7 ай бұрын
Excelente trabajo Ephraim 👍🏽✅
@EphraimGariguez 7 ай бұрын
Salamat po!
@reaguerreromiguel7899 7 ай бұрын
Cual es su gain en dBi
@jeffreyragasa7416 7 ай бұрын
Hello sir PWD po ba kmi MAGPAGAWA nyan
@EphraimGariguez 7 ай бұрын
Pwede naman po, pero hindi po advisable sa heavy use yan.
@SparkyRF 7 ай бұрын
Just wanted to mention that the COS signaling is a positive voltage, NOT negative. Notice that the meter probes are plugged in backwards on the meter, itself. So, no carrier (COS inactive) is 4.8V, when active (carrier present) is near 0V.
@eduardoalcantarajr3668 7 ай бұрын
sir tanong ko lang kung mag diy ako pwede ba yung element naka pasok sa boom i mean is mag drill ako ng butas sinlaki ng element tapos dun ko ipasok sa boom instead na nakapatong? thanks
@EphraimGariguez 7 ай бұрын
Pwede naman po
@shuttereye4740 8 ай бұрын
Bro magkano ang ganyan?
@EphraimGariguez 8 ай бұрын
6.5K
@tipico01 8 ай бұрын
Muy bueno y te felicito amigo !
@RenatoBlanco-o7i 8 ай бұрын
Me darías las medidas de la antena y la distancia entre los elementos y el gama match, gracias
@EphraimGariguez 4 ай бұрын
dw1zws.com/build-4-elements-yagi/ and the gamma match dw1zws.com/building-the-gamma-match-for-4-elements-yagi/
@Emmnoyhl 8 ай бұрын
Hope you're not still wasting people's time
@EphraimGariguez 8 ай бұрын
Obviously the only time wasted here is yours, get a life don't waste more time behind your keyboard garden is a better playground :)
@jhaprtk 8 ай бұрын
Meaning?
@EphraimGariguez 8 ай бұрын
Don't waste time watching videos from this channel if it's not beneficial for you, because others are really interested on it, though it is not for everyone. Do you wonder why educational videos / channels got very few viewers? - because its not for everyone.
@revadan 8 ай бұрын
back in the 90s those tubes are thicker. marihap na makahanap ng ganon ka kapal na tubing ngayon pre. 1/2 ba yan?
@EphraimGariguez 8 ай бұрын
3/8 tubing po
@bhadreshthakkar3447 9 ай бұрын
Hope you have successfully completed. Please share the details.
@Vichardhara303 9 ай бұрын
CQ From VU3YWB ...QSl....very nice video ..and I want to build this antenna...please help me .kindly Help me please....
@quimcastellvi5840 9 ай бұрын
Thank you for the solution!
@EphraimGariguez 9 ай бұрын
glad that it helps.
@janross1983 10 ай бұрын
Bakit po antaas ng swr ng f22a ko po sa 144.000 1.6. Sa 146.000 1.2 sa 14800 1.4
@EphraimGariguez 10 ай бұрын
Ano ba ang ine expect mo bro? nasa tolerance level yang values ng SWR mo pwede mong i adjust i check mo yung cutting chart ng antenna mo, ang 1.6 :1 SWR ay 5.3% power loss lang so kung 100 watts ang radio mo ang loss mo ay 5.3watts lang - Unfornately walang perpektong antenna system pwede mong i adjust hanggang makuha mo ang gusto mong level pero within tolerance level yan check mo eto. dw1zws.com/power-loss-at-various-swr-readings-and-residual-power/ ang G7 antenna for example ay rated as less than 1.5:1 at 2Mhz bandwidth dw1zws.com/g7-antenna-cutting-chart/
@cyrilpontilla5769 10 ай бұрын
My 5 element yagi Antiina is 2 stock , what is the Distance betwen 2 Antinna ? And the length of Harnest, my Frequency is 145.000
@EphraimGariguez 10 ай бұрын
Please use the calculator provided the file is downloadable from the description of the video thanks.
@cyrilpontilla5769 10 ай бұрын
Sir gd afternoon, my Antinna akong 5 element na 2 stock, anu ba haba nga Harnest ko ? At sa boom ng stosk ,
@EphraimGariguez 10 ай бұрын
depende po sa frequency ng antenna ang haba ng harness eto po ang pag compute sa harness kzbin.info/www/bejne/sIOkk5x8q616otk ang spacing naman usually 4ft pag vhf pag 5 elements
@lezalga23 10 ай бұрын
Bigla ko nakita tong video mo ng convo natin tito.... Now ko lang nakita to
@EphraimGariguez 10 ай бұрын
Tagal na yan bro nasa las pinas pa ako. Adik ka pa sa radyo ha ha ha.
@davidc5027 10 ай бұрын
There ya go, point it at your neighbors ;)
@EphraimGariguez 10 ай бұрын
Ha ha ha :)
@johnemmons9087 10 ай бұрын
Another nice one!
@EphraimGariguez 10 ай бұрын
Thanks
@marujimohammad299 10 ай бұрын
Pwede ang rg 58 gawin gamma insted of wire #18?
@EphraimGariguez 10 ай бұрын
RG8 po pwede RG58 masyado maliit at malambot, yung center lang ng RG8 na may plastic