ezUHF range - lo/hi power setting

[Coyote]

The EZUHF power range is 9-12v, a 2S pack is 7.4v so obviously underpowered for the 9-12v in that case

[markvanhaze]

I got Sanders mail now and did as  advised, turning a poti inside the ezuhf tx up a bit. I got to 4.3km before the failsafe kicked in, tx on high setting.
I could turn the poti a little more but I'm waiting for Sander to tell me if that is wise.
I am now not sure if my placement of the rx in the Skywalker was good, maybe that's the problem. After all, there's the engine and the carbon rods that support the tail in the way. I'd there any way of testing what's the cause?

[Coyote]

You could run a series of tests, the EZUHF has a micro test mode doesn`t it ?

[Xup]

I got Sanders mail now and did as  advised, turning a poti inside the ezuhf tx up a bit. I got to 4.3km before the failsafe kicked in, tx on high setting.
I could turn the poti a little more but I'm waiting for Sander to tell me if that is wise.
I am now not sure if my placement of the rx in the Skywalker was good, maybe that's the problem. After all, there's the engine and the carbon rods that support the tail in the way. I'd there any way of testing what's the cause?

Shame you don't have the EZosd or you could have tuned the pot watching the RSSI values, find the best,.... then hot glue the pot to lock it.

I'v pm'd you mark

[markvanhaze]

Today I managed 5km and no failsafe! I didn't change a thing, wtf?
All that was different, I had my 3s 2200m itay Lipo fully charged.
What's the voltage needed for the ezuhf?

[Coyote]

9-12v DC

[6lennn]

Hi Mark

I get the feeling that you Are thinking that extra voltage will give you extra range. I dont think that is right, all that happens to excess voltage is that its turned into heat and your board gets hot, which is not good in the long run

When I first saw your pics I imediately thought that the rx was too close to the motor, esc and video tx. There is a post on here somewhere that tells you what should be kept away from what and what can be close to each other.

My gut feeling is that this is the route of your problems, not voltage powering your tx

I think you should look at the positioning of all your electronics before you start looking for faults with your equipment.

good luck

[Coyote]

I got Sanders mail now and did as  advised, turning a pot inside the ezuhf tx up a bit. I got to 4.3km before the failsafe kicked in, tx on high setting.

To put this into perspective, I got 8km ground test on OpenLRS on just 100mw power setting. That`s way less than EZUHF on high setting. Something is definitely wrong  with your results

[markvanhaze]

No I'm aware that any excess voltage does nothing. I needed to know the lower limit for ezuhf. But since it's 9v, the 3s will do fine and I don't let it drop below 9v anyways in feat of damaging it.
Any suggestions on where tl place the rx?

[Coyote]

At least 12" from GoPro or 433 noisy camera's.

[markvanhaze]

Ok will check that and tonight do one more flight with the gopro stitched off.

[markvanhaze]

Hi,

Gopro off, no difference. After 2.5km failsafe kicks in. Also, I measured 15 inches between Gopro and the ezUHF rx.

I stand on a hill, 60m above ground, no obstruction whatsoever, LOS, keeping the Fresnel Zone as clear as possible, all flying done at an altitude of 800m.

But, here is some new,interesting info: I had the tx set to low, and as long as I had the antenna of my tx perfectly vertical, the failsafe did not kick in. In fact, I flew 6.5km like that, on low, all ok.

So then the question of course - do you all fly with the TX antenna perfectly vertical?

[Coyote]

I fly with tx pointing horizontally, this is so if a failsafe kicks in I raise the tx to get control straight back when flying normally.

I also don`t fly with monopole uhf rx antennas, I fly with dipoles after finding they yield far better results

[Xup]

Mark....mine is set exactly as in the pic (mark knows what I'm talking about :))

I'm waiting for this to arrive, just to try out so the antenna is always vertical, might have to shorten the cable , but rather not as it can sit on top of the Van.

http://www.locuradigital.com/en/magnet_bases/mini_mag_sma.htm

Do you have anyone near you with the EZosd  ?, where are you based ?

[markvanhaze]

I fly with tx pointing horizontally, this is so if a failsafe kicks in I raise the tx to get control straight back when flying normally.

I also don`t fly with monopole uhf rx antennas, I fly with dipoles after finding they yield far better results

For exactly the same reason I fly with the antenna horizontally - its a safe warning if I hit the range limit and gives me the chance to increase the range by pointing the antenna up.

Dipole antennas - where do I get those?