We all know that lame feeling when you want to fly your FPV racing quad but there is something keeping you from punching that throttle to the top. It could be bad weather, no charged lipos or broken parts waiting to be replaced.
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When getting into the world of fpv racing choosing a good combination of video links could be a jungle. There are many aspects that needs to be covered such as frequency, power, weight and size etc. Reading this will hopefully give you a clearer picture of how this combination works and if it suits your needs.
In this review we will cover the basics of the Boscam RC305 and TS351 including specs, setting them up, connectors/cables and finally a rough range test.
This is a very well proven FPV combination that is used by both new as well as experienced pilots with a combined pricetag of ~35$ depending on where you order it from.
Connecting cables and binding
WARNING! Never connect power to the receiver or transmitter before you have attached the antennas, not even for a few seconds. Doing that could damage the components.
Lets start with the TS351 transmitter. It has a female JST connector included for power supply which is very convenient, you can just connect your favorite battery to it and it will start. The other cable that is included is for audio/video feed and power supply to the camera. The pinout is from left to right: audio in, audio in, video in, power out, ground. The pin headers are spaced the standard 2.54mm (0.1 inches) apart which makes it possible to only use the three outer pins (video in, power out, ground) with a servo lead:
Setting the frequency of the transmitter is done by changing the position of the levers in the DIP-switch. To do this I suggest cutting a small square hole in the shrink wrap attachment below. The position of the levers should correspond to the channel configuration you want to use. There is a picture included in the package (I’ve also attached it here further down) showing this. I recommend using a small needle or screwdriver to change their position, they are really small! The frequency should correspond to the one you set on your receiver.
The RC305 receiver also powered via a JST connector cable which is included in the package. The other cable that is included is a 3.5mm plug with female RCA plugs. The included cable is very short and some FPV monitors needs an female to male adapter. In those cases this longer cable could be used 3.5mm audio/video plug cable. It has male RCA plugs which you can plug straight into the Quanum DIY FPV Goggles for example.
The frequency of the receiver is also set with a DIP-switch. Even though the levers are slightly bigger than on the transmitter I recommend using pliers or a screwdriver to move them. Most of the times you can just set a frequency and stick to it unless you are flying with someone else on the 5.8 ghz band.
Pairing the receiver and transmitter
You could try experimenting which frequency that gives you the best signal, the most important is that you use the same frequency on both the transmitter and receiver. I’ve attached a picture of both the channel layouts below. The channels on both devices is mapped to the same frequency. This is not always the case when pairing a transmitter to a receiver so you must pay attention to that.
Boscam rc305 + ts351 range test
When performing a range test I picked the same location as I normally fly in for several reasons. It’s a big grass field/crop land and I know the terrain, which helps alot when trying to get orientated up in the sky. I used my diy 1.2m foam flying wing as a testbed. The transmitter was located pretty close to the middle and not out in one of the wings as it ideally should be. The receiver was mounted on a pole in my DIY fpv backpack which elevated it to around 2 meters off the ground.
When I launched it and switched to fpv mode the image was crystal clear. It remained so until around 300 meters out where I could start noticing slight interference. When getting close to the 600 meters mark there interference was strong and I started doing a big turn in order to keep the plane leveled. The reason for doing this is to keep the antenna pointing upwards to maintain it’s radiation pattern towards me. A rubber ducky monopole antennas radiationpattern looks like a big donut, with the antenna in the middle of the hole:
I tried a couple of more flights and they all ended around the 600 meters mark.
The cheap pricetag of this FPV tx/rx combination makes it very attractive and I’m sure that most FPV pilots has either used it, is using it or have it as a reserve kit. For people getting into this hobby this is the most recommended FPV combination due to it’s simplicity, low cost, reliability and ease to use. You can buy other antennas to increase the range further – I will be reviewing this Cloverleaf antenna combination together with this FPV combo in the near future, so keep an eye out.
Receiver dip switch is partially hidden under the metal casing, making it harder to change the DIP-switch position.
It’s hard to see what channel the transmitter and receiver is currently set to.
The receiver lacks any good brackets or screw holes which makes it hard to mount.
The ts351 transmitter is quite heavy compared to some other transmitters which are both smaller and lighter with the same power.