Maybe shielding your regulator inside an Isothermal bag (those that are lined up with Aluminium) would help?
It may be some sort of military radar, but it is normal to hear the beeps in the headset when parked close to the rotating radar antenna. Can you not hear anything at all in that situation?
Yes I've had the beeping in ANR headsets at Cherburg.
Delayed my departure for a minute while I tried to figure out what was causing the beeping! Figured it was easier to solve on the ground than in the air. After checking everything that I could thinking, I looked outside while thinking and noticed that the timing matched the radar rotation :)
But it affecting the O2D2 or something similar when it is held next to the antenna is at least plausible, isn't it?
The transponder is transmitting only when pinged by SSR, which in flight is almost all the time.
That's what happens if one replies to two posts in one... of course the transponder does not affect the ANR headset, otherwise we would all go bonkers [in fact one of our school fleet does have a transponder crackle in the intercom.. I try to avoid it]
But it affecting the O2D2 or something similar when it is held next to the antenna is at least plausible, isn't it?
The ANR headset beeps can't be transmissions from my own transponder because if they were then I would hear them all the time in flight. The transponder is transmitting more or less continuously, because SSR is everywhere.
It may be some sort of military radar, but it is normal to hear the beeps in the headset when parked close to the rotating radar antenna. Can you not hear anything at all in that situation?
I only heard them with ANR headsets, not in classic ones, so I assumed the radar interferes with the ANR electronics, not the audio signal directly.
Unlikely, transponder pulses aren't very high power (150W or so), and a lot of people would be affected by that.
But the antenna is a LOT closer.
Could very well be that the signal from the transponder antenna was interfering with the O2D2 regulator...
Unlikely, transponder pulses aren't very high power (150W or so), and a lot of people would be affected by that.
Some french joint civil/military airfields (such as Dijon) do have high powered radar (primary military, I guess) close to the runway.
Why are you turning on the regulator manually? There is the D5 (or D10) option, which will activate the unit automatically when passing FL50 (or FL100).
You have to turn it right off after a flight, otherwise it always draws a bit of power.
This is not the terminal radar for the airport but some long range radar, correct?
It may be some sort of military radar, but it is normal to hear the beeps in the headset when parked close to the rotating radar antenna. Can you not hear anything at all in that situation?
That is an interesting observation, Peter.
I once had the situation that the O2D2 regulator was on the floor behind the front seats, and it started beeping. I took it on my lap, and the beeping was gone.
Could very well be that the signal from the transponder antenna was interfering with the O2D2 regulator...
PS: Why are you turning on the regulator manually? There is the D5 (or D10) option, which will activate the unit automatically when passing FL50 (or FL100).
This is not the terminal radar for the airport but some long range radar, correct? I have been to many airports with surveillance and approach radar and never heard the pulses. The only pulses I've heard were from my 150W beacon but this one is gone for good.
Maybe the French are researching a new method to burn your KFC225 servos? 
