Thank you Frank and Tony.

I think we have looked at all the issues you suggested. I maybe wasn’t clear that this is a motorglider and indeed there is no noise with the engine stopped!

The antenna is embedded in the fin and I believe is an end-fed sleeve dipole. I have checked it with a SWR/VNA. In ...

We recently replaced the Becker 4201 radio in our Stemme 10 motorglider with a Becker 6201.This is a direct plug-compatible swap. We now have dreadful interference which I’m 99% certain is due to radiated ignition noise (it sounds right and disappears when the antenna is unplugged). The previous ...

Apologies if I've missed it elsewehere, but was there any follow-up on this? Is a skills test included, if the examiner is an LAA member?

Also, all of the ORS documents say the aircraft must be "jointly owned", so would a sole owner be covered? A literal interpretation would suggest not, to my mind ...

If you have a laptop, this is a superb piece of free software:

http://www.tunelab-world.com/rpmsound.html

It analyses the engine sound using the built-in mic, determines the fundamental frequency, and displays the corresponding engine RPM. Out of curiosity, I took my laptop for a walk while ...