ImpulseRC Micro Reverb

By fjulian79 on Aug 17, 2019

10  569  6

This is my second 3 inch build. The first one has been the QAV-Code Red which is also presented here in another build. When I broke a arm of the Code Red I realized that the Bottom Plate alone is not easily available in Europe and I also don't want to spent more then 30€ each time a break a arm. Looking for an alternative Frame makes me falling in love with the Micro Reverb .. so here war are.

What I like most is the compact design, the cheap arms and the easily available spare parts. At first, my plan was to reuse as much as possible from the Code Red but then bought also a new Mamba stack as there has been a offer from Banggood and everyone seems to be exited about the noise characteristics. I also bought a new camera and VTX antenna. The rest is the same gear I have already used before.

Regarding VTX antennas .. I have used Lumenier Micro AXII UFL so far but ALL of them broke in more or less harmless crashes (4 pieces so during this summer, but one of them on this frame). I also have a regular SMA AXII which isn't working anymore but I can't remember a hard crash with it .. So I'm seriously disappointed on their reliability. The Lollipop is now in duty for aprox. 20 packs and still fine!

Regarding the RunCam Phoenix Oscar Edition ... Never have had camera which was good as this one before!! OK there are sometimes some digital artifacts, but on the other side the WDR is awesome and It adopts new light conditions so fast that they are never a issue again! And in the end it's all about to see where you are flying to!

Regarding the TBS Unify Pro32 Nano ... It's just WOW .. I have almost no noise, amazing range and it survived 4 broken/disconnected Antennas in crash situations while it was powered on. So buying this one a second time to have a spare part at hand was useless so far. I plan to use my "spare" it in one of my next builds.

Regarding the Capacitor ... I have used the one which came with the Mamba stack, but I was not able to connect it to the pads directly. The reason for that is the Hellgate Buzzer. My solution was to use AWG18 Wire .. 2 or 3 cm. If this is valid or a good solution? .. I'm not sure! I have no significant video noise so far, so there is nothing to complain about right now .. but maybe just because the batteries are new and I'm only on 4S. Anyway .. for now it works fine :-)

As said before I have flown aprox. 20 packs or more on this frame and I'm more then happy. I'm using the stock BF 4.0.4 PIDS but have disabled the gyro and D term low pass 2 filters as I have a lot oscillations when they are enabled. Without them everything is perfectly fine. I have also enabled DSHOT600 and set the PID loop to 8Khz. Beside of that I have switched to reversed prop directions and I'm happy with that. Can't really say if it flies better that way, I have done it to avoid a crash when hitting branches.

Photos

Part List

Frame

ImpulseRC Micro Reverb 3" FPV Frame (3 builds)
Pyrodrone.com
$39.99

Flight Controller

MAMBA F405 Mini Betaflight Flight Controller & F25 20A 3-4S DSHOT600 FPV Racing Brushless ESC (36 builds)
Banggood.com
$43.99

Motors

4 x T-Motor F20II F20 II 1408 3750KV Brushless Motor 2-4S For 130 140 150 Multi Rotor (18 builds)
Banggood.com
$71.96

Propellers

Gemfan Flash 3052 Tri-Blade 3" Prop 4 Pack - Choose Your Color (44 builds)
Racedayquads.com
$2.99

FPV Camera

Runcam Phoenix Oscar Liang Edition (11 builds)
Pyrodrone.com
$37.99

FPV Transmitter

TBS UNIFY PRO32 NANO 5G8 (80 builds)
Pyrodrone.com
$29.95

Antenna

2pcs Foxeer Lollipop 85.5mm 5.8G 2.3dBi RHCP UFL Super Mini FPV Antenna Red/Black For RC Drone (46 builds)
Banggood.com
$19.99

Receiver

Frsky R-XSR Micro Empfnger 16ch S.BUS / CPPM Telemetrie (749 builds)
N-factory.de
$29.91

Batteries

Tattu R-Line 850mAh 4s 95c Lipo Battery (20 builds)
Getfpv.com
$19.99

Radio

FrSky Taranis X9D Plus 2.4GHz ACCST Radio & X8R Combo w/ case (Mode 2)
$244.99

Goggles

FatShark Dominator HDO 4:3 OLED Display FPV Video Goggles 960x720 for RC Drone (92 builds)
Banggood.com
$499.99

Misc Parts

HellGate FPV Buzzer - HellGate FPV Buzzer (14 builds)
Buzzer.hellgatefpv.com
$23.82

Video Receiver

ImmersionRC RapidFIRE w/ Analog PLUS Goggle FPV Receiver Diversity Module (105 builds)
Banggood.com
$149.00

Backpack

Lowepro QuadGuard BP X3 - Drone Backpack for 4 FPV Quad Racing Drones and 15" Laptop w/Exterior Mounts (Black) (24 builds)
Amazon.com
$286.00
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Discussion

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Jodie Froster   Aug 18, 2019  
1

I've never seen power leads terminated like that, what does your battery side plug look like? What are those called?

Show 2 more comments
fovea   Aug 25, 2019 

if we open an xt30, xt60 or ec conectors there come the bananas out there. is there a way the should pluged in, gnd first?

fjulian79   Aug 26, 2019 
1

Hmmmm not when using just a XT60. If you use my connectors this would be possible or when you add another connector in paralell. On the other side .. why do you have a need for doing so?

fovea   Aug 27, 2019 

i dont understand the meaning, sry. "another conector in paralell" does mean if two batterys paralell?
i cutted ec conectors to fit with a xt60, because there wasnt a spare xt60 and the ec fit if cutted middlepart. inside of this conectors are normal bananas... i thought about use them as bananas because of your example. but the question about plus or minus plug first seems to be unimportant, when i understand your answer.
to make the bananas nearly as save, the wires plus and minus wire in diffrent lenght can give some more savety.

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