PTR2 Humming sound through headphones when connected to mains
- From: "Ankers, Dave \(UK\)" <Dave.Ankers@xxxxxxxxxxxxxx>
- To: <ptr1-users@xxxxxxxxxxxxx>
- Date: Thu, 15 Mar 2007 10:00:28 -0000
Hi all,
When I connect my PTR2 to the mains I hear a humming noise through the
headphones(Bose noise reduction). If I plug in my external mic(Sony
ECMMS907) and touch the metal, the humming stops. The same happens if I
plug in a double ended line in lead and touch that.
I also use a Re-tel Intelligent recording interface to record telephone
conversations. When this device is used with the mains connected to the
PTR2, there is a loud buzzing on the phone which is even louder on the
other end. Once the mains is disconnected from the PTR2, no humming or
buzzing can be heard.
I have returned the unit to the RNIB, and they tested it but could not
hear any humming through the headphones(Standard headphones). I have
also tested Brian Hartgen's PTR2 and that does exactly the same as mine.
It is a shame to have to disconnect the mains when using the unit, has
anyone else experienced this?
Regards,
Dave Ankers
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