Gender
Male
About
Location
Oklahoma
About Me:
Retired US Army Paratrooper, Combat Vet of Afghanistan, Iraq, Saudi Arabia, and more. I know the value of UAVs and am a long time RC pilot, Amateur Radio Operator and embedded programmer who is really excited about DIY'ing them.
Please tell us a bit about your UAV interest
Most interested in long loiter time and medium to long distance operating.
Hometown:
Stratford
Activity Feed
"Monroe, Parallax makes the Basic Stamp & several other PIC microcontroller-based boards (among a large number of other items), but they in no way originated the PIC chip, which is made by the Microchip company [url]http://www.microchip.com/[/url]."
"The maximum range of any radio is the result of many elements, mainly antennas and altitude. As for the power output of the 3DR radio, it is listed in the information supplied by them. The max output is 100 milli Watts, but it can be reduced through…"
"After 25 years carrying around 100-150 lbs on my back, up and down the mountains, deserts and jungles around the world, I don't notice little things like a few pounds hanging around my neck. Be that as it may, I also tend to sit down and put this on…"
"I made this solely with items I had in the shop, and it is version 1... I will probably make another one out of aluminum sheet after a few tests for usability and practicality.
A couple more…"
A couple more…"
"Okay, here are some pictures of my tray.CameraZOOM-20140418082833257.jpgCameraZOOM-20140418082910154.jpgCameraZOOM-20140418082858950.jpg"
"I'll post some a little later today"
"I built a transmitter tray which holds a monitor, my tablet, vid receiver & recorder, LiPo battery & a 5V BEC - the radio & bluetooth to my tablet are zip-tied to the tray."
"Depending on what your receiver will do and how you connect it to the Pixhawk, you should be able to either connect to the servos on the receiver directly, or configure the servo output of the Pixhawk to "pass through", which will simply do exactly…"
"Part of my reply was culled because of the html-like angle brackets I used.
I said "I believe it's a half wavelength" before 'length' in my previous post."
I said "I believe it's a half wavelength" before 'length' in my previous post."
"Travis, I can't provide a reference right now, but using a length of 75 Ohm coax is a standard technique for transforming the impedance seen by the radio."
"What an elegantly simple solution! I am using the same combination of frequencies in my X8,so have been following your comments to Iskess closely. I will model a couple of options in EZNEC and test them in real life, and post my findings as well.…"
"Joe, many thanks for the great explanation. I am a longtime Ham - KM5MM - but have never "gotten into" VHF/UHF, preferring HF CW contesting, so that is one antenna book I have never read.
Anyway, I appreciate the detailed theory which will allow me…"
Anyway, I appreciate the detailed theory which will allow me…"
"That would be wonderful James. Thanks in advance!"
"You really need to drill down on some details, mostly involving your payload - what kind of sensors/cameras/etc. are you going to be carrying - and what kind of duration do you need? Are you going to be mapping urban lots, or farm fields of hundreds…"
"Joe, thanks for a very informative post. Can you provide details on the tube balun calculations needed to determine dimensions for different frequencies? I am very familiar with conventional balun construction but had not heard of this concentric…"
