WA2ZKD

all systems running now... 2 unloaded kiwi/BBAI run 31 deg. and the 2 with 14 channels of continuous kiwiclient run 34 deg, in my cool basement

Project is done mechanically, just needed to update the firmware in everything, configure and hook up antennas.
Pix may be viewed at https://www.dropbox.com/sh/x7tt18loi84bpg3/AADLeN3iU6g7ZoPi520opbQpa?dl=0

Almost ready... removed paper ducts and with 4X 14 ch installed max temp at 100% CPU is 44 deg C, a 19C rise

Since I've found an adequate cooling scheme, see: http://forum.kiwisdr.com/discussion/1939/alternate-cooling-method#latest

I have gone on to finalize my "kiwi cluster", 4ea BBAI based units combined with a common fan.



I went this route to reduce fan noise. The box on the back is a plenum for a single 90 X 90 mm AC fan. I used a best quality ball bearing fan.

Initially (see other thread) I had some ducting in the inlet side of the kiwi enclosure. I found today that was no longer needed, I stay below 44C, only 19 deg above room ambient.

Some of you may say "wow, that's a lot of dollars"... I can duplicate that for $1400 or $25/channel (there's the potential for 56 channels there). Better performance and less money that dongles!!

Almost ready... removed paper ducts and with 4X 14 ch installed max temp at 100% CPU is 44 deg C, a 19C rise

The evolving kiwi cluster

The evolving kiwi cluster

The evolving kiwi cluster

simple alum. and yes I designed it and made them with a water-cutter. I'll publish the drawing. I have that cardboard baffle there to defleact the air to a more favorable path.

Relative to that topic, is there any how-to, guide or documentation anywhere to improving and tuning reception quality on your KiwiSDR?

I do not think there is anything in one spot. There are many excellent posts here in this forum. Here's a summary of my experiences:

• Have a reasonably good antenna and keep it away from known RFI sources.
  
• Be conscious of things like MW BC overload and apply filters as required
  
• Avoid switching PSU, some are quiet but most are not so try to use linear PSU
  
• Understand Common Mode Interference, read up on it, applies the easy remedies like use of ferrite core and intermediate grounding on your feedline
  
• Watch for spurious using the [SPEC] display on a KiwiSDR client webpage, much noise can be noted by "lumps" of noise or spurs carriers at repeating spacing across a band
  
• ID noise spurious by turning things on/off within your dwelling ot near the antenna
  
• a partial list...