Thursday, November 28, 2019

DJI FPV HD System (draft)

I'm preparing the DJI FPV systems review (my current project, lot's of fun, very interesting!).
You can already see my own notes and get a ton of info from it - or you wait until my video is finished and consume it with some popcorn...
The txt file above is a work in progress...

Antennas  - for example - look like this:


First video: Latency test - see what I found while measuring it on the oscilloscope:

Tuesday, November 26, 2019

iFlight Cinebee75HD honest Review and Flight footage


!DISCLAIMER! - Banggood sent me this product for review, you can buy it here   (I DONT use affiliation links - I'm not a sales guy, here you get HONEST reviews and opinions).
Acessories:
4 Pairs Gemfan 3-blade
iFlight 1103 Brushless Motor


Saturday, November 23, 2019

RCSchims Ultimate FPV-Antenna test 2019 (many omnis, patches and helical...


EXCEL RESULTS sheet
Same test 2018
Aaronia Spektran review (the DB measurement device)

!DISCLAIMER! - ORT sent me some antennas for review, you can buy them here
Banggood sent the Foxeer Lollipop 3
I DONT use affiliation links - I'm not a sales guy, here you get HONEST reviews and opinions.

My test-setup:
I use 1mW on the transmitter, 5m distance to a VERY SENSITIVE receiver (Aaronia Spectran HF6065 -150dB!) and take enough samples from the -DB reading on the display to get an average.
The VTX is warmed up before the test - this way I can be sure it stays at the same output level for all antennas. This is not 100% accurate. On start I had 815uW and after 1h testing it showed 1029uW or 1mw - but this should not impact measurements too much!
Time Rank Type -dBm -dBm ant. null (or 90°sideways for directional)
00:21:32 1 dir. -45,3 -64,8 ORT Helix 6 Turn
00:20:14 2 dir. -47,4 -68,6 Circular Wireless Helix 12dB
00:18:23 3 dir. -49,3 -69,1 ORT Helix 3 Turn
00:15:50 4 dir. -50,3 -79,9 Triple Feed Patch 9.4dB
00:16:45 5 dir. -51,3 -70,1 VAS Crosshair Extreme
00:15:00 6 dir. -51,6 -68,5 Triple Feed Patch 8dB
00:09:48 7 dir. -52,2 -65,2 IRC Spironet Patch 8db
00:10:25 8 dir. -52,2 -68,2 Menace PicoPatch
00:14:17 9 dir. -53,4 -67,6 Foxeer Echo Patch
00:11:54 10 dir. -54,4 -67,7 ORT DualShield
00:11:02 11 dir. -55,9 -67,4 ORT Shield
00:03:42 12 om. -56,6 -70,2 Foxeer Lollipop 1
00:03:23 13 om. -57,5 -76,5 Aomway SPW blue
00:08:07 14 om. -57,8 -78,3 ORT 6Lobe SPW
00:07:40 15 om. -58,8 -68,6 Foxeer Long coax Pagoda pro
00:04:20 16 om. -58,9 -70,6 Foxeer Lollipop 2
00:06:55 17 om. -59,6 -80,0 ORT Pagoda
00:05:59 18 om. -59,8 -71,5 SpeedyBee Antenna
00:04:50 19 om. -60,0 -72,7 Foxeer Lollipop 2 Stubby
00:05:34 20 om. -60,0 -69,8 Foxeer Lollipop 3