On Wednesday, July 23, 2014 5:49:00 PM UTC-6, 6PK wrote:
On Sunday, July 20, 2014 5:29:59 PM UTC-7, jfitch wrote:

On Friday, July 18, 2014 9:19:00 PM UTC-7, Doug Mueller wrote:



Is anybody else having noise issues when the Oudie is hard wired







to ships power. I know two aircraft that have the squelch turned on







to try to drown out the noise on the radio. I believe it is from the







Oudie while it is being charged. I recently added the Oudie to the







aircraft and now the radio will not cancel out after receiving a







transmission. I have tried wrapping the wiring of the oudie and the







gps cables to try andshield them but it isnt helping. After I turn off







the Oudie the radio returns to normal. Thanks, Doug







Not an Oudie but the closely related Avier. I had used this last year without issue, just reinstalled it and now the radio breaks squelch with it on. After some tracing I have discovered it is the unit itself, radiating modulated RF, mostly down its data/power cable. Disconnecting the cable at the PDA end solves most of the problem. Disconnecting at the vario end sometimes solves it. Just touching a screwdriver (as an example) to the shield of the Avier mini-usb plug causes it with no other cable plugged in. Seems to be related to the LDC screen driver, as it is dependent to a large extent on what is being displayed on the screen. Switching the (switching) power supply to it on and off makes no difference. I was able to mitigate most of it by careful reroute of the data/power cable keeping it away from the radio and close to other conducting material. But it is a bit black magic. I didn't have a ferrite to try and will try that next opportunity.



Ditto. Same issue with the Avier/Vertica2. I did try the ferrite beads as well and it did nothing. Sent in my antique Dittel radio to Nick in Florida who charged me $175 and sent it back with a clean bill of health, could not find anything wrong with the radio. I was going to mess with the internal squelch than but when plugged all in; it all worked!

Talking about magic?!

6PK

I also had occasional radio noise issues. When I unplugged the Vertica 2, the radio noise interference stopped. I then plugged the V2 back in, moved the 12V power converter over to the far side of the panel and all the noise issues stopped. With the V2 again plugged in, I moved the power converter again close to the radio, the noise interference started.
Now I have the 12V power converter moved to its new location....no noise interference on the radio.
I did try the Ferrite couples from Radio shack and they didn't help.

Best, #711.