Two Kiwi's in a hard drive box
For some reason I have been interested in putting Two KiwiSDR's in one box with simplified wiring.
So far I have two sdr's, a wireless router, two DC-DC supplies and a single Power over Ethernet cable coming in.
I have had an issue with one not starting the network in this configuration (this is the first time I've powered it up) but I've seen that before and I think I am causing the issue by having the SMA's grounded and connected to remote grounded feed lines, might also be the router sharing one DC-DC but that worked for a similar device before.
I intend to put power switches on the back and maybe some extra electrolytics in there, there's plenty of room ;-). The idea for the router was to have it wirelessly bridging to another but this three port thing just doesn't do it like the other Mikrotik hAP's I've tried, it seem to connect but is not routing and I decided to move on as I should be able to fix that later.
Of course my local QRM is running full bore right now so I'll have to defer noise tests or wait until I have it somewhere else. The POE should handle about 8-24V so I'll feel happier carting this somewhere and sticking a linear up the cable.
So far I have two sdr's, a wireless router, two DC-DC supplies and a single Power over Ethernet cable coming in.
I have had an issue with one not starting the network in this configuration (this is the first time I've powered it up) but I've seen that before and I think I am causing the issue by having the SMA's grounded and connected to remote grounded feed lines, might also be the router sharing one DC-DC but that worked for a similar device before.
I intend to put power switches on the back and maybe some extra electrolytics in there, there's plenty of room ;-). The idea for the router was to have it wirelessly bridging to another but this three port thing just doesn't do it like the other Mikrotik hAP's I've tried, it seem to connect but is not routing and I decided to move on as I should be able to fix that later.
Of course my local QRM is running full bore right now so I'll have to defer noise tests or wait until I have it somewhere else. The POE should handle about 8-24V so I'll feel happier carting this somewhere and sticking a linear up the cable.
Comments
I have found the SDR to be a bit better on current than the specs would suggest, the two Kiwi's on the linear PSU are showing (if I can trust the meters) 1.35A @ 5.2V, the router is max 3.5W.
I had taken your previous comments about heat into consideration and will run the fan at 12V when we get the heatwave we are predicted..
The supply on this is a 13.5V 1A wall wart and that is quite warm.
Thanks for the reminder, wont't leave it on while at work just yet.
currently these should be accessible at
stucapon.plus.com:8075 -with outside antenna (waving in the wind, neighbour has his spark transmitter running)
Second one :8076 -with 50 Ohm termination
Something at 2.9MHz, and the general noise floor higher up the band but still less than local noise here.
Will try ferrite and I did plan to put a mesh shield between the Kiwi's and the back part.