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  #141  
Old 09-12-2015, 07:08 AM
chepburn's Avatar
chepburn chepburn is offline
 
Join Date: Apr 2006
Location: Ottawa , Canada
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Received my pi on Friday,, waiting for the SDRadio stick next week.

I'm planning to add a USB serial out to the go code to feed my Odyssey's ADSB in...looking forward to integrating this.

Once done, I will share it.

Chris
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  #142  
Old 09-12-2015, 01:24 PM
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Charles C Charles C is offline
 
Join Date: Apr 2014
Location: Orlando, Fl
Posts: 157
Default Any ideas

I have bought my Stratux and love it so far. I was wondering what people are using as a case and other options for the antennas. I was hoping to find a way to clean it up and keep the wires contained and maybe some type of quick disconnect for the antenna.

The main reason I am asking is because I went on my trip to ATL and had to fly back on the airlines due to weather and my wife made me dissemble it, split up the pieces and put in in several different bags. She didn’t want to have the TSA holding me for several hours trying to get it through security…LOL. Also I was at work before I left for the trip and had it was sitting on my desk and a K9 deputy (friend of mine) came in the hanger and he thought he might have to go get his dog to do a sweep of the device to make sure it was safe.….He was joking .

Also is there a need for the dual attennas?

So any photos would be nice. Thanks.
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Last edited by Charles C : 09-12-2015 at 01:41 PM.
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  #143  
Old 09-12-2015, 02:29 PM
Scrabo Scrabo is offline
 
Join Date: Dec 2008
Location: Phoenix, Arizona
Posts: 285
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Flew today with it again, didnt take long for it to shutdown on the glare screen, but sitting on the backseat it was fine.
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  #144  
Old 09-12-2015, 02:47 PM
emuyshondt emuyshondt is offline
 
Join Date: May 2009
Location: Leander, TX
Posts: 166
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Anybody know how well this stub antenna would work with the Raspberry Pi setup? The return loss graph in the datasheet makes it look like it should work ok. It is much better than the graph for the antenna used by the Skyguard TWX setup.
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  #145  
Old 09-12-2015, 03:01 PM
Scrabo Scrabo is offline
 
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Location: Phoenix, Arizona
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I used these today with good results

http://i.imgur.com/JNBFRmm.jpg?1
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  #146  
Old 09-12-2015, 04:41 PM
Darin Watson Darin Watson is offline
 
Join Date: May 2011
Location: Calgary, AB
Posts: 147
Default 2 radios

Quote:
Originally Posted by Scrabo View Post
I used these today with good results

http://i.imgur.com/JNBFRmm.jpg?1
So being a neophyte...is this setup for dual band?
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  #147  
Old 09-12-2015, 05:05 PM
Scrabo Scrabo is offline
 
Join Date: Dec 2008
Location: Phoenix, Arizona
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Quote:
Originally Posted by Darin Watson View Post
So being a neophyte...is this setup for dual band?
Yes

Its just slapped together with velcro straps and rubber bands until I find a better way to package it
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  #148  
Old 09-12-2015, 06:47 PM
PaigeHoffart PaigeHoffart is offline
 
Join Date: Jun 2005
Posts: 375
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Quote:
Originally Posted by emuyshondt View Post
Anybody know how well this stub antenna would work with the Raspberry Pi setup? The return loss graph in the datasheet makes it look like it should work ok. It is much better than the graph for the antenna used by the Skyguard TWX setup.
I'm not sure what skyguard is using, but a 4dB return loss isn't good. The higher the return loss number, the better (lower) the SWR is.

Simply stripping the shield off a piece of the coax, leaving 2 7/8" of insulated center conductor exposed would probably work better. For best performance use a $20 transponder antenna on your belly and connect it to the SDR dongle.

Paige
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  #149  
Old 09-12-2015, 07:33 PM
Scrabo Scrabo is offline
 
Join Date: Dec 2008
Location: Phoenix, Arizona
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Quote:
Originally Posted by PaigeHoffart View Post
I'm not sure what skyguard is using, but a 4dB return loss isn't good. The higher the return loss number, the better (lower) the SWR is.

Simply stripping the shield off a piece of the coax, leaving 2 7/8" of insulated center conductor exposed would probably work better. For best performance use a $20 transponder antenna on your belly and connect it to the SDR dongle.

Paige
Skyguard uses these and this is their supplier.. I use these myself.

http://www.digikey.com/product-detai...SMA-ND/1139580
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  #150  
Old 09-13-2015, 02:58 AM
emuyshondt emuyshondt is offline
 
Join Date: May 2009
Location: Leander, TX
Posts: 166
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The datasheet for the Skyguard antenna is at https://www.linxtechnologies.com/res...916-cw-hwr.pdf and says the antenna is recommended for 900 to 930 MHz. It has a pretty sharp VSWR curve that is at a minimum just below 916MHz. If tha antenna works well, the other one I posted should look even better. I haven't tried either, though, and Skyguard seems to get enough performance out of theirs.
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