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Jonny10001
Австралия
Добавлен 7 ноя 2006
The Telstra Telecommunication Museum.
The Telstra Museum located in Kitchner Parade Bankstown NSW Australia is a treasure trove of over 100 years of telecommunication equipment. Only open by appointment and staffed by enthusiastic volunteers proud of this collection of telephone and communication memorabilia.
Просмотров: 363
Видео
Can You Capture Energy From An AM Radio Station Antenna?
Просмотров 580Год назад
I first tried this as a school boy, pedalling by bike with back pack out to Prestons, south west Sydney. Setting up on the grass by the perimeter fence hoping to light a little light globe, guess what, it didn't work! Fast forward 65 years and having a second try!
How to build your own 23cm band digital amateur TV transmitter using off the shelf parts, EXTENDED.
Просмотров 555Год назад
Digital TV is superior to analogue but cost and complexity has always been a problem, until now! Just by using cost effective off the shelf components you can upconvert to any frequency in the 23cm amateur band or even higher! Now includes additional information on hardware and software to improve your ATV presentations. 23cm Bandpass Filter Build:- ruclips.net/video/62H6pLJzFVQ/видео.html Modi...
How to build your own 23cm band digital amateur TV transmitter using off the shelf parts.
Просмотров 2,4 тыс.Год назад
Digital TV is superior to analogue but cost and complexity has always been a problem, until now! Just by using cost effective off the shelf components you can upconvert to any frequency in the 23cm amateur band or even higher! 23cm Bandpass Filter Build:- ruclips.net/video/62H6pLJzFVQ/видео.html Modifying the PA module for 23cm band operation:- www.vk3rtv.com/ampmodshl7008.html
Set top Box manual search to receive digital amateur TV.
Просмотров 5992 года назад
Amateur digital TV is often transmitted on the 70cm amateur band. Auto frequency searching using a set top box or TV will not find the signal because 70cm amateur band is not included in the search. This video shows how to manually search for a specific frequency, the procedure is similar for most receivers that allow manual search. Note, the digital signal must be present before searching. The...
The Wyong 1996 Amateur Radio Field Day.
Просмотров 1832 года назад
The 1996 Wyong Amateur Radio field day hosted by the Central Coast Amateur Radio Club. Starting with the Australian Amateur TV club display then numerous Australian electronics companies displaying their wares, some no longer in existence. As I upload this in 2021 the field day is still held annually.
How to make a 23cm band vertical antenna with 10dB gain - Ver2
Просмотров 33 тыс.3 года назад
Content is identical to the first video but have greatly lowered the background music level, thanks for the feedback.
How to make a 23 cm band vertical antenna with 10 dB gain.
Просмотров 12 тыс.3 года назад
Step by step construction from cutting the coax sections to the correct length, soldering together then potting. Measuring the SWR and on air testing. From a New Zealand amateur radio article with the link at the end.
Band Pass filters for 23cm, the easy way!
Просмотров 12 тыс.4 года назад
By using rectangular aluminium section and some rods you can make very effective cavity filters for 1Ghz to 4Ghz. The link to the original article: lea.hamradio.si/~s53mv/cavity/cavity.html
Tanna Island, up close with an active volcano.
Просмотров 2594 года назад
Tanna is an island in Vanuatu, an archipelago country in the South Pacific. On the southeast coast is Mount Yasur, an active volcano with frequent explosions from its vents. To the east is Port Resolution with a natural harbor and nearby hot springs. This video is about my trek to the volcano summit and looking into its fiery bowels.
Skyshots Aerial Photography, Australia - How I set it up.
Просмотров 445 лет назад
In early 1999 I had the idea to start an aerial photography business. At that time the methods where model helicopters, model aircraft, kites and Helium filled blimps. The helium blimp method was the way to go for me. I imported the blimp from the USA and had the trailer made in Sydney. The equipment to control the camera was available overseas but very expensive so I decided to build it myself...
The Wyong 2019 Amateur Radio Field Day.
Просмотров 7915 лет назад
The annual 2019 Wyong Amateur Radio field day hosted by the Central Coast Amateur Radio Club. Where buyers and sellers meet in nice surroundings to buy and sell a huge variety of Amateur radio gear.. Held each February and the biggest in Australia and in fact the Southern Hemisphere!
Inglis Horse Auction Warwick Farm 2018
Просмотров 1276 лет назад
The Iinaugural William Inglis Horse auction at Warwick Farm NSW Australia February 2018.
As the point of the multi-element vertical colinear antenna was to get much more gain I was hoping to see some gain measurements.
Great Vertical antenna tutorial! Thank you! 73 from PY2JF.
@@JRSGandara Glad you liked the video and thanks for the compliment.
This museum is now closed. Does anyone know if there are plans to retain and relocate the collection?
How beautiful! Thanks for sharing. Much love, Matthias
Thanks for the kind compliment Matthias.
@@Jonny10001 Your welcome! You are a RF magician 😉 Much love, Matthias ( 73 from DL1NDG )
"Low SWR over a large range" usually means theres a lossy component somewhere. Put a 10dB attenuator inline and the effect will be even greater. There should be a pronounced resonant point to any low-loss antenna.
Calculations? I want to make a 915mhz version
Hi James, you would need to do the calculations to scale it up in size for that frequency, I couldn't help you with that.
I built one of these antennas from RG393. (Of course I modified the dimensions accordingly) Thanks for the video it helped me to find a good way of building the elements.
Thanks for your comment,👍
Thanks for that. Made something similar for an ADS-B receiver on 1090 MHz and it too worked out very well. Your video has given me a few ideas on how to do a neater one and tune it.
Hi Brendan, it’s still up on the mast and working as well as the day I installed it, thanks for the comment.
Very nice!
Hi, thanks for the compliment
I think you just save my day, for the last two to three days that I struggling the SWR on my X7000 antenna and with your video maybe I will build a single antenna for 1.2Ghz Thank you for sharing and congratulations for your work.
Nice project!!!
What would be the best antenna for omnidirectional TV reception USA ??
Hi, most ATV repeater antennas are horizontally polarised so it’s not so easy to receive 360 degrees. Best to find out where your local ATV repeater is and aim a directional antenna in that direction on the amateur band it transmits on.
y'all better hurry up and do these experiments (crystal sets & c.) while there are still some urban 50 kW tx left in the network. BAI & ABC can't wait to shut them down and flog off the real estate for a motza. DAB+ won't cut the (crystal set) mustard.
Thanks for a Brilliant vidclip, Super interesting .... Best to All from ChCh, NZ .... Cheers .... WR2451, KK2451
The 1950s Raytheon booklet Things to do with your CK722 had an amplifier stage powered by the AM station that you're listening to. No need to be near the transmitter tower.
Made my first crystal set when I was 8 years old, this was before the days of small transistor radios, I had to run a huge length of wire for the aerial, a few years later, I made my first transistor radio and could listen to Radio Luxembourg and later the pirate station Radio Caroline.
Careful, Lighting strike would send you back to November 2, 1920.
Would love to time travel !!
A mate and I messed about with using a crystal set to power a calculator, the later version used energy from the local BBC MW transmitter to power a VHF FM receiver.
Looks impressive How do you adjust swr ?
Which type of coax did you use between the ant and the shack please? and how long?
Hi John, I used 9913 coax, about 10 meters from the antenna to the receiver. The 23cm band seems to propagate much better then most people realise. I was was able to receive the distant beacon with the antenna inside the shack when testing even though there was a brick wall in front and a metal roof above!
@@Jonny10001 Thanks very much for the reply!.. Ok I thought the coax would be something like that. I did a lot of S-Band work when there was such a thing as an Molniya orbiting AMSAT and pretty much 9913 was a min so I have some about the place. Yes 23cm interesting band, have been building a UHF tripler using a triode and can trigger a repeater with the output connected directly to a big fat dummy load, go figure. Great video thanx again
What is the insertion loss like? Gorgeous design btw
ATSC 3 should work as well when equipment becomes available. Here in North America, it is 6 MHz.
good video, thanks
Thanks for the kind comment👍
That bandwidth is impressive! Well done!
The initial drawing shows the SMAs on the side of the running screws. Yet your assembly shows the other side. Would this make a difference?
You could sell this as a kit, perhaps
Hmmmm... Unless you have some way to verify precise electrical length of each section, phase errors will be cumulative and result is some serious beam tilt! In any case it will be a very narrowband antenna from a gain perspective.
👍👍👍👍👍👍👍👍👍👍👍👍👍
Hi John What size conduct I did you use and were did your but the jointing resin.
քʀօʍօֆʍ ❣️
I would love to see you play with this....maybe a typical QSO and some radio play! Here is a link you might find FUN 73 de VK2AOE ruclips.net/video/C6Xif9hd2Ps/видео.html
This is awesome! Thanks for the sharing of this info. de VK2AOE
Is there really more local DVB-T than DVB-S on 23cm? Most 23cm DATV I have read about was DVB-S, due to the ease of modulating QPSK and satellite TV receivers working directly for receiving it.
What you say is true but for those that want to go DVB-T this is a "home brew" way of doing it. Our local ATV repeater has both DVB-S and DVB-T inputs. DVB-T does have an advantage in hilly terrain in reducing ghosting problems. The hardware way of producing DVB-T means just a power button is pushed to transmit. When software is used to produce DVB-S a series of tasks have to be undertaken with re-starts sometimes required.
The black magic of antennas.
would that copper sleeve work as a choke for most 213 on different bands ?
It would Graham but you need to resize it to suit the band you intend to use it with.
No, only during the net on a Monday night from 7:30pm AEST. Members can manually turn it on at other times as required.
😊
Excellent video. I am located in Sydney also. Does the Lawson TV repeater transmit 24/7 ?
Hi Henry, thanks for the kind words. We have a Monday night net from 7:30 pm AEST till usually 9:00 pm. Voice talkback is on the 147.325 MHz + offset repeater.
No, only during the Monday night net or other times by group members.
@@Jonny10001 thanks! I watched it via the BATC website last week. Perhaps next week I can watch via RF :-)
@@5Perf65mm Hi Henry T, good to know your watching via the stream. Any 70cm amateur band yagi antenna will give you a good chance of receiving our ATV transmission. You don't have to be an amateur radio operator to text us on the BATC stream, let me know your watching and i'll give you a mention.
A beautiful job and what I will duplicate for 1420 MHz for the hydrogen line. Thank you for posting.
Thanks for sharing. Great job. 👍
Thanks for the compliment 🤗
how do i calculate the lenght for 151.820 MHz thanks
sir whats the dimension for 20m band
HUGE !!!
1.3km long X 200mtr wide X 450mtr deep. The tuning screws are made from 30mtr threaded water pipe.
Great video ! No problem with audio on my android phone . Thanks for sharing & 73
Hard to watch , Even harder to hear what is being said due to the awful loud music ...... What a great way to ruin a narration video 👎👎👎
Watch Version 2 much lower level👍
What was the paper you based this off of? It looks interesting & useful.
@@Jonny10001 Thank you for sharing this. Much appreciated.
Thank for this video... Keep it coming bro dont stop... The world of helium is expanding and your chanel to :)
Thanks for the kind words, live long and prosper...
Awesome video! Clearly and simple explanation! I'm gonna build a filter also, it's not difficult with this video and information. Thanks for sharing!
It's great to see homemade stuff work like a charm, it's an old post now, but I found it. Very informative thanks you done a fantastic job
When I began construction I didn’t know for sure that it would work, just trusting the original article. Thanks for the compliment.