Odroid XU4


Rob Robinett
 

I have finished my work on the WD 3.0 servers and am turning my attention to WD 3.0 clients. 
As a first step I added a command to show new error lines in the 200+ log files in the 27 channel KFS system, and was surprised to find frequent wdprd decode job timeout errors when the Thinkcenter couldn't finish decoding in 110 seconds.
So Pi4 and Odroid systems may be useful only for sites with less than 20 receive channels
 


Rolf Ekstrand
 

Jim,

Sounds like a deal to me as any X86 unit would be a bit more expensive.   I think I'll try the XU4  

-Rolf

K9DZT

  

 


Jim Lill
 

I run the XU4 headless, no monitor or keyboard. I just ssh into it and do everything that way.  I run 26 channels on it without as issue. 630-10M on from one kiwi and 2200-12M from a 2nd kiwi. The kiwi's each have a different type of antenna system.


-Jim

WA2ZKD


On 3/23/22 14:20, Rolf Ekstrand wrote:
Jim,

I would like to try it as Odroid seems to have them in stock now.   This as even raspberries are getting in short supply these days  and I don't like the HDMI connections as they loose connections over time if you move the unit around.  This more so on the 400 even if you use the short flexible  HDMI to micro transition cable.  

I think you said way back that you are using 14 channels on your XU4  and that would be plenty for me.   Still battling heavy interference here between 2.0 - 3.0 Mhz  and  I changed to RTL-SDR 2,6 Mhz High pass but that is not enough to knock down the racket.  I am thinking of using high performance 5 Mhz or there about to knock it out of the Kiwi and then  use single band very narrow band band pass ahead of a high dynamic range RX's  for 3.5  and below. This together with single band magnetic loop for each band and rx. 

Thus I'll run the Kiwi on 7 -  28 Mhz  ( 7 channels as I am running right now) and hopefully 3.5 and 1.8 on single band separate rx's.   I am using the Kiwi with a BB Black here so I am limited to  8 Channels on the Kiwi anyway.     

-Rolf

K9DZT


Rolf Ekstrand
 

Jim,

I would like to try it as Odroid seems to have them in stock now.   This as even raspberries are getting in short supply these days  and I don't like the HDMI connections as they loose connections over time if you move the unit around.  This more so on the 400 even if you use the short flexible  HDMI to micro transition cable.  

I think you said way back that you are using 14 channels on your XU4  and that would be plenty for me.   Still battling heavy interference here between 2.0 - 3.0 Mhz  and  I changed to RTL-SDR 2,6 Mhz High pass but that is not enough to knock down the racket.  I am thinking of using high performance 5 Mhz or there about to knock it out of the Kiwi and then  use single band very narrow band band pass ahead of a high dynamic range RX's  for 3.5  and below. This together with single band magnetic loop for each band and rx. 

Thus I'll run the Kiwi on 7 -  28 Mhz  ( 7 channels as I am running right now) and hopefully 3.5 and 1.8 on single band separate rx's.   I am using the Kiwi with a BB Black here so I am limited to  8 Channels on the Kiwi anyway.     

-Rolf

K9DZT


Jim Lill
 

I may be the only one who uses one of those for WD, but just in case there are others...

I compiled from source the latest version of wsprd and jt9 and have them running.

An easy install and if anyone wants copies, let me know

-Jim

WA2ZKD