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Nov 03, 2010, 08:14 AM
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Jonno271,

I'm not sure why you are confining yourself to a UK vendor but your choices would be considerably increased if you looked beyond the English shores.

The KX171 G2 didn't do as well as the KX171 LVP in terms of RFI. Resolution-wise, I don't see that large a difference between the two in the outdoor scene.

As for the SN777, I believe the whole lot of them are based off the same reference design with some changes in the power supply configuration. As such, I would expect the image quality to be similar. In the last post of the report, you can see that the photo from the FH-25HD is quite good, and this would be representative of the SN777 image (albeit in PAL rather than NTSC.)

Daniel
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Nov 03, 2010, 08:41 AM
Registered User
Not confining myself to UK vendors as such, just favouring them. I'm prepared to order from overseas but can never get a straight answer on import tax/duty...

Of the 3 stills in the final post I actually prefer the G2's picture to the others although the blurring in the lower right is a concern. Maybe that was a one off. The WDR700 is very smooth but kind of makes it look blurred IMO.
Nov 03, 2010, 12:12 PM
Registered User
Daemon's Avatar
Quote:
Originally Posted by Jonno271
I see you have tested the KX550 & SN777 at 5V and 12V respectively, but the SN777 I'm looking at here - http://www.firstpersonview.co.uk/cam...bdb07199f16a70 - is listed as 5V and said to be the same as the KX550
Keep in mind that neither SN777 and KX550 are true model numbers.
If you use KT&C's model numbers then it's much more clear
KPC-VSN500 = 12V version of camera (most people are talking about this one when they say SN777)
KPC-VSN505 = 5V version of camera (one vendor calls this the SN777 and some call it KX550)

As for the noise, pay special attention to the actual magnitude of the noise.
The highest noise camera the VSN500 peaks close to -85dB.
The "noisest" of the KX171's the G2, peaks at less than -100dB or 5x less powerful.

None of them should be an issue with 35Mhz control.

Daniel, I'd love to see the plot for Sander's toroid fix tried on both the VSN505 (which reportedly
"cures" it) and VSN500 (which I doubt can be cured), just so we have a direct comparison against all your other
baselines. The fix as stated is 4-5 turns around a toroid as close to the camera as possible.

Also if you can get your hands on an RCV922. I'm pretty sure it's very low noise.

ian
Nov 03, 2010, 12:26 PM
Registered User
Daemon,

In my earlier testing, I had already established that a lot of the RFI on UHF actually comes across the wiring. In my testing, I made a simple in-line filter and came to the conclusion that a proper in-line filter can reduce the RFI considerably. What I have not done, though, is to actually put a toroid on the line as per sander's post because that came out after I had finished my initial test report. The principle is the same, however, and I have no reason to think that it would not reduce RFI. I may do this, as per your suggestion, to establish a comparable baseline. I am also planning to procure a GoPro for the same reason.

Daniel
Nov 03, 2010, 02:12 PM
Registered User
Daemon's Avatar
I understand, and saw all that. Thing is, Sander's fix was applied to only the VSN505
while you tried a one wrap toroid and an LC filter on the much much noisier VSN500.
I'd like to see a 4-5 wrap filter on the VSN505 to compare to both the VSN500
and to the noise plots Sander posted for his VSN505, where he seemed to have
virtually eliminated the noise.

ian
Nov 05, 2010, 03:27 PM
Keep Flying
anyone no anything about this camera

http://www.bhphotovideo.com/c/search...tialSearch=yes

Ron
Nov 06, 2010, 07:46 AM
Registered User
Bev 480 and DPC-480a don't seem to be the same:

Pixels NTSC: 768x494, PAL: 752x582 (dpcav)
Pixels NTSC: 510x492, PAL: 500x582 (bevrc)
Nov 06, 2010, 07:58 AM
Questionable judgement
bracky72's Avatar
I have them both. They are identical. That must be a typo.
Nov 06, 2010, 03:10 PM
Registered User
I've the well known 420 ccd ($25 shipped) but I need to upgrade it. I'm considering buying the bev 480 pal.
The image quality is real the same? The price difference is really considerable..

Quote:
Originally Posted by bracky72
I have them both. They are identical. That must be a typo.
Nov 09, 2010, 06:59 AM
Questionable judgement
bracky72's Avatar
Yes the image is the same. If you don't mind a bare pcb camera I suggest this one. It's the 540tvl version for $50 shipped.

http://cgi.ebay.com/SONY-CCD-Chipset...item4a9f5183a3
Nov 09, 2010, 08:52 AM
On a holiday?
boopidoo's Avatar
About that camera. It has four wires from the camera to the OSD-board. What is the fourth wire for? Video, power, ground, ?.
Nov 09, 2010, 09:47 AM
Questionable judgement
bracky72's Avatar
Some versions of these cameras have a builtin mic. I think the 4th wire is for audio although this camera has no mic. I removed the 4th (white) wire and all is well.

And also remember you don't need to fly with the osd board. There is the same connector directly on the camera.
Nov 09, 2010, 05:07 PM
Registered User
Throwing another question into the mix. Does anyone know the difference between the KX-171HQ & KX181-HQ? The specs here - http://www.electronicarc.com/catalog...a0722687b2187d & here- http://www.electronicarc.com/catalog...a0722687b2187d look the same to me. Only found one video using the KX-181 HQ here - , looks nice.
Nov 09, 2010, 09:32 PM
Registered User
I was looking at the
RMRC-480 OSD Camera / 480-Line CCD (PAL) by Ready Made RC. I take it that this camera is the same as the DPC-480A OSD Camera / 480-Line from Digital Products Company is that correct the specs are the same.

Kind Regards

Beeper
Nov 09, 2010, 09:54 PM
KB3VOJ
cherokee180c's Avatar
Quote:
Originally Posted by bracky72
Some versions of these cameras have a builtin mic. I think the 4th wire is for audio although this camera has no mic. I removed the 4th (white) wire and all is well.

And also remember you don't need to fly with the osd board. There is the same connector directly on the camera.
Bracky,

If you don't need the OSD board to fly, will the camera just remember all your setup info even after power off? In other words, can the OSD board just be used for configuration and no need to stay with the plane? Can you point to any of your videos with that cam? I just got the metal case non OSD version of that cam in after waiting a month for it to arrive and the video looks real good, so I want to order another cam as backup, but would like to try something else you guys recommend.


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