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Old Jul 30, 2010, 11:10 PM
BEOWULF
North vancouver, B.C. Canada
Joined Apr 2008
18,600 Posts
yes I have

It is voltage sensitive, it needs like over 10.8 volts to work
and is also hungry for power

no need for the 1.5 unless really long range is in mind

Quote:
Originally Posted by Talajouy View Post
Hello

Dose any one test this link set

1.2GHz 1500mw from Sunsky

http://www.sunsky-online.com/view/13...6+receiver.htm
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Old Jul 31, 2010, 09:21 AM
Specializing in RC since 1972
Temple, GA, USA
Joined Jun 2009
3,135 Posts
Quote:
Originally Posted by Talajouy View Post
Hello

Dose any one test this link set

1.2GHz 1500mw from Sunsky

http://www.sunsky-online.com/view/13...6+receiver.htm
A very important question with any unknown video transmitter is "exactly what frequencies does it transmit on". You need to know what frequencies are legal for FPV video in your country.

I would guess that this transmits on some set of frequencies from 1000 to 1200 mhz. Not the 900mhz band. Not the 1201 to 1300 band.

Make sure you find out what it transmits on, not what it receives on. It will usually receive on more channels and bands than it will transmit on.

Cliff
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Old Jul 31, 2010, 09:45 AM
BEOWULF
North vancouver, B.C. Canada
Joined Apr 2008
18,600 Posts
It transmits from ch"4" which is 1080 to ch"c"1360

channels 8 is 1240 and 9 is 1280

mine come with a catalog
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Last edited by David22; Jul 31, 2010 at 10:20 AM.
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Old Aug 05, 2010, 04:09 PM
Arduino Nerd
Long Island, New York
Joined Aug 2010
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So comparison wise, how's the Fox 700 versus the Sunsky 800mw? I was looking into the Sunsky because of its range and price, but if the Fox 700 is better I might look into that instead.
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Old Aug 05, 2010, 04:14 PM
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This topic could really do with some shots of the insides of the various Txs and Rxs, that would also allow folks like myself to comment on build quality of the electronics etc.

Cheers,

Sander.
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Old Aug 05, 2010, 05:12 PM
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Amherst, VA
Joined Jun 2006
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iacei - You beat me to it. I have a Sunsky 800 mW unit I will be testing Saturday. I will post the results here for comparison with the BoB as I have that as well. I will be testing both transmitters and both RX units independently but with the exact same antennas and airplane.

Thus far I can say the Sunsky has slightly higher output power and the TX module is about 1/2 the size (when you remove the module from the case). I have yet to test the SunSky RX. Will do it soon.

-Alex
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Old Aug 05, 2010, 05:25 PM
Videopilot
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United States, NC, Charlotte
Joined May 2009
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Quote:
Originally Posted by ssassen View Post
This topic could really do with some shots of the insides of the various Txs and Rxs, that would also allow folks like myself to comment on build quality of the electronics etc.

Cheers,

Sander.
If I can find the camera charger I will get the BOB 700
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Old Aug 05, 2010, 07:17 PM
Arduino Nerd
Long Island, New York
Joined Aug 2010
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Thanks IBcrazy, looking forward to your results. Also, you said that the Sunsky was 1/2 the size when out of the case, but what about WITH the case? I'm operating a ground vehicle so the extra heatsinking from the case might actually be necessary.
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Old Aug 05, 2010, 11:07 PM
Specializing in RC since 1972
Temple, GA, USA
Joined Jun 2009
3,135 Posts
FOX-700 vs. FOX-800 comparison

I believe that the Sunsky 800 is a FOX-800. I know that the BOB is a FOX-700. I have both a FOX-700 (from BOB) and a FOX-800 (but not from Sunsky). The 700 is on 1280 and the 800 is on 910.

I special ordered the FOX-800 so no use quoting it's channel numbers here. Anybody verified what the stock (say Sunsky) FOX-800 transmitter frequencies are? I am guessing that it runs from 1080 to 1360.

They came with identical receivers and identical antennas. I had to get some 910mhz antennas to get the FOX-800 on 910mhz to work decently.

I permanently removed the extruded aluminum cases from both the transmitters (leaving just the "tin can" case) and I will start the comparison from there.

700 and 800 stand for the power output of the transmitters. The smaller, lighter FOX-800 transmitter puts out 800mw to the FOX-700's 700mw according to the specs.

I usually mount each transmitter on the outside of the airplane in a slot cut in the fuselage with the antenna mounted right on the transmitter and pointing straight up. Both transmitters get a bit hot if you run them on the ground for more than 5 minutes, but cool down just fine even in 100F=38C air with the flight airstream over them.

Indeed the FOX-800 transmitter is smaller and lighter. It has a single push button that allows you to select one of 8 transmit channels. It remembers what channel it was on when you power it up next time.

The FOX-700 has an 8 pin jumper block (4x2) and you can actually select one of 8 different frequencies to transmit on. The frequency I use is 1280 (jumper completely removed) which is the only FOX-700 transmit frequency that is legal in the USA. This corresponds to channel 9 on the receiver.

I have recently put a better RC radio in the FOX-700 on 1280 airplane. I intend to put a better RC radio in the FOX-800 on 910 airplane too and test them both to at least a mile. Right now I am very happy with both systems.

Cliff
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Old Aug 05, 2010, 11:21 PM
Registered User
Australia, QLD, Gold Coast
Joined Aug 2007
856 Posts
Here is some photo of Lawmate 1000mw 1.2gHz AV link
The best price I found on net
http://www.bevrc.com/lawmate-12g-100...mbo-p-120.html

A single page catalog
http://www.nghobbies.com/cart/datash...wmate/2460.gif
http://www.nghobbies.com/cart/datash...ate/241800.pdf

I have not test the output spectrum, I wish I had an spectrum analyzer for that, I did not check the frequency, I just found this list on the net
Ch1. 1080
Ch2. 1120
Ch3. 1160
Ch4. 1200
Ch5. 1010
Ch6. 1040
Ch7. 1240
Ch8. 1280














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Old Aug 05, 2010, 11:29 PM
Specializing in RC since 1972
Temple, GA, USA
Joined Jun 2009
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Quote:
Originally Posted by striker121 View Post
Thanks IBcrazy, looking forward to your results. Also, you said that the Sunsky was 1/2 the size when out of the case, but what about WITH the case? I'm operating a ground vehicle so the extra heatsinking from the case might actually be necessary.
The FOX-800 (Sunsky) extruded aluminum case is just a little longer than the FOX-700 (BOB). Other dimensions are the same.

I recall (without ungluing them to check) that the FOX-800 tin can case is just a little longer than the FOX-700 tin can case too, but otherwise the FOX-800 is much smaller than the FOX-700.

Cliff
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Old Aug 06, 2010, 12:57 AM
Registered User
Luxembourg
Joined May 2009
804 Posts
Wow I go away a bit and all of a sudden so much info to put on first page!

Working on it!
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Old Aug 06, 2010, 01:16 AM
Registered User
Luxembourg
Joined May 2009
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Talajouy we need a bit info about how well your Lawmate 1W works stock and what is the 2nd Tx on the photo?
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Old Aug 06, 2010, 01:33 AM
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Australia, QLD, Gold Coast
Joined Aug 2007
856 Posts
Quote:
Originally Posted by iacei View Post
Talajouy we need a bit info about how well your Lawmate 1W works stock and what is the 2nd Tx on the photo?
The second transmitter next to lawmate is FOX 800mw from Sunsky.
The second receiver next to lawmate is the regular 1.2gHz receiver.

I tried to compare them by size to gives you scale of this unit.

I have test it table, not on air yet, but so far I have get stable good quality on ALL CHANNELS, (I have good picture only on CH7~9 on my 700mw FOX and 800mw Sunsky).
No drift in frequency by touch or move the TX unit, (On my FOX units if I touch the TX body, or move it, I get flip and noise on the screen)
No drift in frequency by getting hot (again on FOX units I have noise by TX getting hot, and I can get noisy picture on one channel up and down)

By the test results has done on FOX units they have strong second harmonic around 13dB (test has done on 1000mw FOX TX), it can be problem for 2.4 radio user, unfortunately I do not have an spectrum analyzer to test lawmate and get the harmonics strength.
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Last edited by Talajouy; Aug 06, 2010 at 01:42 AM.
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Old Aug 06, 2010, 01:35 AM
BEOWULF
North vancouver, B.C. Canada
Joined Apr 2008
18,600 Posts
Quote:
Originally Posted by theothercliff View Post
I special ordered the FOX-800 so no use quoting it's channel numbers here. Anybody verified what the stock (say Sunsky) FOX-800 transmitter frequencies are? I am guessing that it runs from 1080 to 1360.

Cliff
you have to read the posts more carefully

i posted in the last page the info
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Last edited by David22; Aug 06, 2010 at 01:46 AM.
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