The SS9900 has made its way back into the car, connected to the cigarette lighter as before however this time it is plugged into that lead using Anderson Powerpole connectors, which should ensure a satisfactory connection.
The radio was connected to the antenna as well and powered on during my shift last night, popping it into 11-meter mode after I watched a video by fredintheshed on YouTube I had a listen on 27.555 USB (I don't TX on it) and found it was busy compared to other times I have listened in, which more or less correlates with the fredintheshed video, bearing in mind he was receiving on a proper CB antenna and using a Yaesu FT-450D, which is a better setup than my mobile antenna and CRT SS9900, though I have no issues at all with the 9900.
I'm going to have to get the antenna retuned for 10-meters, I just need to shorten the whip as far as I can and hope to do this when I get 5 minutes as it looks like conditions may be picking up and I can start to think about operating 10-meters.
Before I do that I'm going to be trying to do some CB tests using the RTL-SDR at a distance and the legal CBs on a clear enough channel, using the antenna on the car of course, and put the results up to YouTube, most of my CBs are now also on Anderson Powerpole connectors so can use the same lead.
After this I can tune the antenna for 10-meters
73 de 2E0EIJ