#my first mod 😁😳

35 messages Β· Page 1 of 1 (latest)

twilit ridge
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as expected I shredded my Vtx antenna on my first and only FPV so far nanohawk.

I love in middle east so options of parts are very limited so or I wait 2 months for delivery.

Anyway I did this, added a lollipop antenna, it seems heavier, it still flies, (still did not try outdoor)

Question: should I do a retune, PIDs etc...?

Also I would love any thoughts and feedback about this.. should I have done something totally else?

glad nacelle
lilac wind
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that this would be the optimal choice as that antenna's super heavy for that size of quad, but if it works and flies, and you can't get a normal whip antenna... "it's not stupid if it works"

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my only concern is that it's making the rear motors work harder. The front ones can't go to full power otherwise they'll flip the quad backwards. So having the antenna more centered on the quad would be more efficient and probably would fly a little better

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that said, I assume it's hard to solder that large coax cable correctly

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the antenna also has the best reception/transmission when it's perfectly vertical

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but just make sure you have it soldered correctly and that it's not shorting out the VTX pins.

twilit ridge
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I flew it indoor on angle mod and it stayed for like 3.min flying

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I couldn't solder it on the board cause the aux cable is huge

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So I used the old cable and connected to the aux antenna by soldering cable to cable and I know it might not survive long

lilac wind
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did you get the inner and outer pins of both coaxes soldered correctly?

twilit ridge
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I tried between rooms and the original antenna was horrible comparing to what this is doing

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Yes so inner pin to inner and outer to outer wrapped the whole thing with heat shrink and some electric tape

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Regarding to make it centred it's hard.. I had to break the frame to pass it I will try if I open it up again

lilac wind
twilit ridge
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Got great news also, meteor75 just got shipped today, I've been waiting 1 month,

lilac wind
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just make sure that the center pin doesn't become disconnected. If it breaks, then the energy coming from the VTX will have nowhere to go and actually gets "reflected" back into the VTX itself, which could burn it out

twilit ridge
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Is there a RHCP whip antenna?

lilac wind
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I think by their nature, those whip antennas are linearly polarized

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I'm not exactly sure how they work, but those and dipoles I believe are non polarized, or "linearly" polarized

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VitroidFPV probably has an article on it

twilit ridge
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will check it out, thanks for ur response

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I literally disamble it today and had no idea what to do

twilit ridge
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So I broke my goggles antenna and ordered another one since it's available in my country

lilac wind
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there's a few cool 3d diagrams of how linear and circular polarization works in that article

glad nacelle
hidden nova
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No it is polarized

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The field goes wibby wibby in the axis of the antenna

glad nacelle
hidden nova
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All light is polarized, what we call unpolarized light is actually just light where each photon has a random polarization

glad nacelle
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ok

glad nacelle