Humming EX1r

[jeddv]

Hi,

I get an annoying amount of hum from the headphone circuit of my EX1r. It happens when the camera is switched on and is not related to whether there is a microphone plugged in or not, nor to monitor or recording levels.

I use Sennheiser HD25 headphones which have an impedance of 70 ohms but the problem is still there with some Beyerdynamic DT250s.

I would appreciate any other EX1r owners reporting on whether they experience the same thing before I send the camera back to Sony. Alternatively, do I need to use headphones with a different impedance (this seems unlikely because the Sennheisers work well at sensible monitor levels)?

Cheers,
Jonathan

 

[LeavingTheCandy]

No hum at all on mine. Is it both channels?

 

[jeddv]

No hum at all on mine. Is it both channels?

It's entirely independent of channel selection.

 

[LeavingTheCandy]

Sorry to say, you must have something wrong with the audio circuitry. Mine is quite clean and does a great job with audio.
I suppose it's not interference from something in the room?

 

[Jason Davenport]

Simply play back audio on different system, if it's not there. It's just the noise from the headphone amplifier in camera.

 

[jeddv]

Simply play back audio on different system, if it's not there. It's just the noise from the headphone amplifier in camera.

Yes, it's not there when I play back clips on the computer. I just wanted to check if it was standard with the EX1r headphone circuit or whether there was a problem with my machine in particular.