Is my VTX dead? I crashed the quad and this happens now

Mehigh

Mehigh

Member
Hello,

So yesterday I went for a flight with my quad, and I flipped it in the air and crashed it right onto the VTX, the antenna joints broke and I did the soldering back. The problem now is that once the VTX gets a little hot it messes up the image. When I change band and channel on the VTX, it doesn't change at all, it is stuck on E-3, although the leds show that the channel has been changed, the FPV goggles only get the image on E-3. Is it dead? :(

Video:

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Mehigh said:
Is it dead? :(
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I'm afraid it is more than likely fried.
You see, the final output stage of the amplifier in the transmitter expects to see a load (the antenna) that will dissipate the energy.
If the connection breaks then all that energy is reflected back into the amp and smokes it and often the rest of the circuitry too.
The same thing happens to most any transmitter when their antennas have problems or are disconnected, including your RC transmitter.
 
That blow backs a biatch.
Two of my quads are on pigtails for that reason. I mounted the vtx so it stick out the back, not on top. I have found that receivers are OK to run without an antenna, by mistake.
 
mozquito1 said:
I have found that receivers are OK to run without an antenna, by mistake.
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Yep, receivers aren't generating any power, they're "just listening" and without a connected antenna it's just really quite out there ... lol ...
any TX, on the other hand, tends to "let the magic smoke out" :p

I used to make some decent money "replacing finals" in and "peaking" of CB radios back in the day and (for a little extra $) could get you about
15 watts (instead of 4, as per regs) out of a stock radio :) I just loved those under the dash slide-in brackets they used to sell because the crappy
electrical connections they'd make would often smoke people's radios and keep me plenty busy ;)
 
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