best antenna

[abcd567]

Any opinion about / experience of:

Beaglebone-124x157.jpeg ... OR ... [ATTACH=CONFIG]5369[/ATTACH]

[1090 MHz]

Any opinion about / experience of:

[ATTACH=CONFIG]5368[/ATTACH] ... OR ... [ATTACH=CONFIG]5369[/ATTACH]

The BeagleBone Black would be my second choice, it's also what the FR24 radios run on ....

AKA the Radarcape http://ads-b.ca/cpu.htm

http://beagleboard.org/black

[1090 MHz]

I ordered my Firtst Pi (Raspberry Pi B+) from a seller in Ottawa (buyapi.ca).

Order date Jan 06, will be delivered on Jan 08 - 2 dsys delivery time by Canda Post Expedited Post.

Prices are good, see order prices below:
[ATTACH=CONFIG]5370[/ATTACH]

$39 is a great price... here are 182+ projects using a Raspberry Pi https://hackaday.io/projects/tag/raspberry%20pi

Also check this out .. very interesting:
Raspberry Pi, Beaglebone Black, Intel Edison – Benchmarked !
http://www.davidhunt.ie/raspberry-pi...n-benchmarked/

The Intel Edison is the new kid on the block... came out Sept 2014. It's much smaller, and way more powerful then the BB and Pi and only $50
Being an Intel product you can expect it to be great.

Edison runs a dual-core Silvermont Atom at 500MHz, alongside a 100MHz Quark chip - Intel's low-power processor designed for wearables and the IoT.

It also comes with 1GB of LPDDR3 RAM and 4G of flash storage, and supports dual-band Wi-Fi and Bluetooth 4. It has a USB 2 port and supports SD cards, and has a 70-pin connector.

Edison is truly tiny; Intel has compared it in size to a postage stamp, and it measures 35.5 x 25 x 3.9 mm.



http://www.pcpro.co.uk/news/390730/i...arrives-for-50

[abcd567]

$39 is a great price... here are 182+ projects using a Raspberry Pi https://hackaday.io/projects/tag/raspberry%20pi

Also check this out .. very interesting:
Raspberry Pi, Beaglebone Black, Intel Edison – Benchmarked !
http://www.davidhunt.ie/raspberry-pi...n-benchmarked/

The Intel Edison is the new kid on the block... came out Sept 2014. It's much smaller, and way more powerful then the BB and Pi and only $50
Being an Intel product you can expect it to be great.

Edison runs a dual-core Silvermont Atom at 500MHz, alongside a 100MHz Quark chip - Intel's low-power processor designed for wearables and the IoT.

It also comes with 1GB of LPDDR3 RAM and 4G of flash storage, and supports dual-band Wi-Fi and Bluetooth 4. It has a USB 2 port and supports SD cards, and has a 70-pin connector.

Edison is truly tiny; Intel has compared it in size to a postage stamp, and it measures 35.5 x 25 x 3.9 mm.



http://www.pcpro.co.uk/news/390730/i...arrives-for-50

Thanks for very useful & interesting information.

I am happy to discover this Canadian seller http://www.buyapi.ca.

His prices are good, and he sells RPi, Arduino, Bbone-Black-4G (Beaglebone Black Rev C Canadian $54.95).

The best thing is that they use speedy shipping, not a slow boat like Baofang's Chinese seller used

[1090 MHz]

The best thing is that they use speedy shipping, not a slow boat like Baofang's Chinese seller used

Speaking of China, here are some nice LCD readouts that are always fun to play with and interface nicely with many of the Pi projects.
Best of all is the price of less then $4 shipped to your door: http://www.ebay.com/itm/New-Yellow-1.../261180606999?
A dual line for less then $10 shipped: http://www.ebay.com/itm/20X2-2002-20.../170933732631?

[STR_EDDS]

Hello,

i builded a Franklin antenna but i dont get any planes with that.
I used 6,87cm and 13,75cm with 1,5mm² copper wire.

After cut some wire i received 2-3 planes.
With a 6,7cm dipole i receive up to 200 nautic miles.

I solderd both open ends directly to the coax cable, is that ok?


IMG_20150108_173247.jpgDSC02576-R90c.jpgreichweite.jpg

[abcd567]

Hello,

i builded a Franklin antenna but i dont get any planes with that.
I used 6,87cm and 13,75cm with 1,5mm² copper wire.

After cut some wire i received 2-3 planes.
With a 6,7cm dipole i receive up to 200 nautic miles.

I solderd both open ends directly to the coax cable, is that ok?


[ATTACH=CONFIG]5377[/ATTACH][ATTACH=CONFIG]5378[/ATTACH][ATTACH=CONFIG]5379[/ATTACH]

The model of Franklin you have posted is WITHOUT phasing stub at center. It has an impedance of several hundred ohms, and hence SWR (for 75 ohm coax) is very high. Without amplifier you will see very few planes and a very short range.

If you are not using an amplifier, you should use Franklin with impedance matching stub. If you go further down the posts from where you found these photos, you will find the design/photo of Franklin with impedance matching stub.

The half-wave diapole (total length from tip to tip = half wavelength = 13.8 cm, hence each leg = 13.8/2 = 6.9 cm) has a low impedance of 75 ohms, which perfectly matches with the coax impedance which is also 75 ohm, hence SWR=1 (best value), and you get good results.

There is no harm if you solder two legs directly to the coax, one to core and other to braid. However take care that:
(1) the gap between the two legs at coax is as small as possible, around 2 to 4 mm,
(2) the two legs wires are not shorted i.e. wire metals don't touch each other. There is no harm if wire insulations touch each other.

[abcd567]

Speaking of China, here are some nice LCD readouts that are always fun to play with and interface nicely with many of the Pi projects.
Best of all is the price of less then $4 shipped to your door: http://www.ebay.com/itm/New-Yellow-1.../261180606999?
A dual line for less then $10 shipped: http://www.ebay.com/itm/20X2-2002-20.../170933732631?

Wow, $4 + free shipping! that is almost free, amazing Chinese!

[STR_EDDS]

There is no harm if you solder two legs directly to the coax, one to core and other to braid. However take care that:
(1) the gap between the two legs at coax is as small as possible, around 2 to 4 mm,
(2) the two legs wires are not shorted i.e. wire metals don't touch each other. There is no harm if wire insulations touch each other.

Thanks


I build now this one from you... http://forum.flightradar24.com/attac...7&d=1389630588

[abcd567]

Thanks


I build now this one from you... http://forum.flightradar24.com/attac...7&d=1389630588

This is an earlier model with 10mm gap between matching stub wires. The range shown is with amplifier.

Later computer simulation & trial runs showed a substantial improvement if gap is reduced. Optimum gap is 3mm, but difficult to make. 5mm is easy to make and gives good results, so change the gap of phasing stub from 10mm to 5mm.

After trying various antennas and selecting the one which gives you best result, your next project should be adding an amplifier.

Range & number of planes for ALL antennas increases substantially when an amplifier is added.

[bezeefly]

I have ordered this amplifier from china through eBay to try it's suitability for adsb.
It is not costly, Canadian $3.66 + free shipping = Two cups of coffee at McDonalds
It will arrive 4 to 6 weeks from now

[ATTACH=CONFIG]5276[/ATTACH]

I just received the other amplifier FC-AMP-SAT/S that I bought at eBay. This amplifier is working fine with adsb.
http://www.ebay.co.uk/itm/181530030324

FC-AMP-SATS-inline-amplifier.jpg

[1090 MHz]

I wonder is this an official manual of FR24 or just something someone put together? http://www.ebay.com/itm/Flight-Radar.../390805478371?

$T2eC16V,!)!E9s2fB+b7BRFSbsGP)g~~60_12.JPG

Yep... seems the real deal... it's on Amazon too: http://www.amazon.co.uk/FLIGHT-RADAR.../dp/B00BAAR3YA

[abcd567]

I just received the other amplifier FC-AMP-SAT/S that I bought at eBay. This amplifier is working fine with adsb.
http://www.ebay.co.uk/itm/181530030324

[ATTACH=CONFIG]5381[/ATTACH]

Great. Congratulations.
The one I ordered still not delivered. When I get it I will replace my existing RCA D903 amplifier by the Chinese one. This will show whether your indivifual puece was defective, or this model does not work for adsb.

[abcd567]

I wonder is this an official manual of FR24 or just something someone put together? http://www.ebay.com/itm/Flight-Radar.../390805478371?

[ATTACH=CONFIG]5383[/ATTACH]

Yep... seems the real deal... it's on Amazon too: http://www.amazon.co.uk/FLIGHT-RADAR.../dp/B00BAAR3YA

Good guide, but price is too high.

[F-EGLF1]

Good guide, but price is too high.

I don't know how legitimate this is, it appears to be one of these self published books as it has NO ISBN NUMBER, also it was published 2 years ago but only appears to have one review on Amazon (by the author perhaps ?)
The price for an out of date book of dubious legitimacy seems excessive to me.