Original setup upto 5 am on April 22, 2016:
Cantenna >> 20 cm pigtail >> generic DVB-T pluged into OPi. Dump1090 gain setting = max
Current setup starting from 5 am on April 22, 2016:
Canceiver using Pro Stick, plugged into OPi using USB 270 degrees bend male/female. Dump1090 gain setting = 30 dB
The location of Cantenna is exactly same in both the above cases.
Observations:
(1) Gain setting of dump1090 above 30 dB greatly reduces performance.
(2) At gain setting of 30 dB, the performance is less than the generic DVB-T, all other parts of system and antenna location being same.
Conclusion:
I have to add a Filter. With filter most likely I will be able to increase the dump1090 gain 40+ dB, in which case the performance of Pro Stick will become better than generic DVB-T.
Have to order a Filter. My wallet will be CDN$ 27 lighter!
I have used SMA-male to F-female adapter for Can - Pro Stick combo.
The F- female is up and protruding outside the can. The 1/4 wavelength whip is inserted into it.
The SMA-male is inside the Can pointing down, and the Pro Stick is screwed to it