Just started my first analog build and a little stuck with the vtx. Iv soldered to the video out pad and set up in my goggles but no pic as yet..
So was thinking is the pad at the back of vid out “ET” something I have bridge?, not really understanding what the ET tab is for ???.
Have you connected a camera? I ak as you don’t mention it…
Have you enabled Analogue VTX in your betaflight build ?
Use voltmeter to see if you have power on +5v pad
Is yourt goggles on same band and channel as the VTX is?
Which FC is it?
Hey Steve, yes to 5v and yes to same band but not sure about enabling analog in BF what’s that under???
for sometime now, when you flash BFLT because of memory restrictions in some CPU’s you need to select functions you want to use and not others, I’m not sure on the defaults but I wouildn’t be surprised if ‘digital vtx’ has replaced ‘analogue vtx’
This will explain better… starting at 3:30
Are you coming to Big Meet?
Bring it over, I promise not to keep it for three months 
lol …… no I can’t make it due to family commitments
It seems you will have quite a few issues if you haven’t used or know your way around betaflight. Also, make sure you never power up the vtx without an antenna Connected and ensure you have a good air flow across it so you don’t cook thé board.
Where about are you located. It is very difficult to try to explain by text or phone. You could always look on YouTube. Bardwell has some great tutorials over around 10 parts. Takes quite awhile to watch but very well demonstrated and explained.
If your local enough, id be happy to help. I’ve built loads of quads.
The Happymodel CrazyF411 ELRS AIO integrates the flight controller, 20A 4-in-1 ESC, and UART ExpressLRS receiver, requiring minimal wiring for core components.
Power and Motors
Video Transmitter (VTX) Wiring For analog VTX units, the wiring uses specific pads to utilize SoftSerial, as UART2 is reserved for the ELRS receiver:
resource SERIAL_TX 11 A00 ).Telemetry and Peripherals
Configuration Note If using an analog VTX, you must enable SoftSerial in Betaflight and remap the TX pin to the LED_STRIP pad via CLI to avoid conflict with the UART-based ELRS receiver.
You can take all that with a pinch of salt but it does look like there may be some extra faffing to do in BF
Yah iv just been swotting up on it again and I think iv brought an FC that needs a separate VTX 
which is a pain, this analog malarkey is proving a real learning curve 
Yeah, I think so. I
So when you said you’d soldered something to VOUT, was that the camera?
I’ll have a look through my spares boxes, I’ve probably got a spare VTX you could have.
Yah it was mate vout, I knew I should have gone with a betafpv Fc as I wouldn’t have needed a vtx 
..
I you do have a spare that would be great and would be happy to bung you a few quid 
I have one of these in a bag which says “DUFF VTX?” But you’re welcome to have it and give it a go. I should have an antenna knocking about to go with it.
I also have one of these, which appears to be completely brand new. Possibly not so suitable for a toothpick build.
https://www.akktek.com/akk-race-vtx.html
You’re welcome to both of them if you want to tinker. I have no use for them.
I’ll be away this weekend, though. 
Cheer mate happy to trade you a few beers for them
Thank you, I’m normally pretty good it’s just proving a little challenging as I’m a digital guy normally hence where my my knowledge base is
Let me know (a) what your preference of tipple is and (b) your address and when you’ll be in ..
Honestly, I don’t want anything. They weren’t expensive parts in the first place and there’s no guarantee they’ll be any good for you. Just “pay it forward” when you get the chance. 
I’ll be in The Nag’s Head in Belper this evening from 6pm to 9pm, if you’re passing through. Failing that, we can organise a rendez-vous some other time (not this Tuesday evening), or I can even bung it in the post.
Oky doky happy to meet up later in the week if ok with you??? Let me know when and where’s best for you