21 August, 2015 at 00:46 #18393
and another question of choice. I’m playing around with buying the TBS 25mW 5,8Ghz Video Transmitter. Because it’s supposed to be fully legal in Europe and quite small.
But does it work together with the servo on the 5V rail? Has anybody experience with it? Do I get any noise on the video feed or something similar?
Best22 August, 2015 at 21:57 #18466
Since you would have to power both your VTx and your board camera from the 5V rail, I would go with the Immersion 25mW 5.8GHz A/V Tx instead. Same legal output power, but runs on 4S and outputs clean 5v for the board camera.
Bigger (but fits the mini nicely)
Only 4 usable frequencies (the TBS has a few more.)
A 5v/2A BEC would on the other hand power both a GoPro and the TBS VTx and a 5v board camera (Most board cameras run on 12v though).
Long story short: You’ll need an extra 5v BEC to run the TBS 25mv VTx.23 August, 2015 at 14:05 #18483
thanks for your answer. But Does one VTx really consume so much power? I’ve to measure that one…
I don’t like the idea of adding an addtional BEC. I’m currently running one on my full size Tri to power the HK TS5823 VTx. It’s rated for 24V, but I fried one of them when I plugged in a 4S battery. And the BEC generates visible noise in the video feed. (which sucks).
I currently use the FR632 deversity receivery on my Quanum V2 goggles. I’d like to be able to use as much channels of it as possible, that’s why I did not consider the Immersion 25mW 5.8GHz A/V Tx up to this point (yes I know to much output power for Europe). But I like the idea to power the camera from the receiver. And considering the 12V power supply requirement I might have to look deeper into the receivers available.
May I ask which VTx/Camera you use on your mini(s)?
Best23 August, 2015 at 14:08 #1848418 September, 2015 at 11:10 #19754
So after breaking a few VTx’es the past week:
The ImmersionRC style VTx’es do fit, but limit the space for the lipo.
If it was legal in EU, I would use a 200mW ET200 transmitter. Light, small, cheap, has a 5v output and one button channel select. – Just add a circular polarized antenna of course 🙂18 September, 2015 at 11:20 #19755meborcParticipant
It is legal, if you have a radio amateur license. Getting the license is actually not that hard and will allow you to operate all kinds of cool equipment.18 September, 2015 at 18:14 #1977018 September, 2015 at 19:53 #19777
Dang, now you made me buy one… 😀
Looks like the same form factor as the ET200, so it should fit nicely into the mini frame.18 September, 2015 at 20:21 #19779
It definitely does! (: I’ve received it a couple days ago.20 September, 2015 at 18:50 #19922
@LeoTheHuman nice Transmitter. May order mine soon. But can you confirm, that it does work with a 4S setup? My last transmitter does not do it, even though its rated for it.
And I’ll go for the recommended camera. Hope to get number 9 in the air soon. 🙂20 September, 2015 at 18:58 #19925
I haven’t installed ET25 yet, but I can confirm ET200 does indeed work on 4S. These are almost the same. You might need an external LC filter though.20 September, 2015 at 19:07 #19927
That was quick! 🙂 Thanks for the info. I’ll order one for myself then.
Can you recommend a LC filter? Is the noise so bad?20 September, 2015 at 19:40 #19928
I guess I just have too much time to spare now. (:
The noise doesn’t feel too bad, actually, but I believe the filter helps a bit. I prefer my picture to be as clear as possible, especially if I only need to add a few grams for that onto a ~700g craft.
I haven’t tested enough filters to recommend something, the only one I used was DIY and it helped tremendously on a DIY transmitter. This one definitely has some filtering in it already, but it was built with size in mind. Something like this: http://www.ebay.co.uk/itm/231628817513 but rated for 25V might really help.
I would really like to know if someone finds the filter that is rated for 16.8V+. Links will help.20 September, 2015 at 23:43 #19957
I might actually use pololu step-down to 12V and an LC filter after that for the cleanest power. (:21 September, 2015 at 17:42 #20015
@LeoTheHuman thanks for the input. Lets see, if I’m satisfied with the video image without step down. 🙂 But it’s a hobby so there is no end of building by definition. 😀
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