buzz in audio

[tg]

I bought a cheap thingy off ebay that enables me to record one side of a
telephone conversation: this thing...
http://cgi.ebay.co.uk/Telephone-Cal...57238QQcmdZViewItemQQ_trksidZp1713.m153.l1262
Item number: 220321741431

it works ok but it causes a background buzz in the handset and it's
irritating when trying to have a phone conversation. The noise comes in
as soon as the audio jack plug touches any socket to record. Is there
any quickfix or handy gadget one can get that will eliminate this noise?
Here's a 13 second sample of it - starts with audio plug in, I pull the
plug out for a couple of seconds and then push it back in again.:
http://home.freeuk.net/tonj/buzz.mp3
thanks for any pointers.

 

[William Sommerwerck]

Is the recorder connected to the AC line? If so, that is likely the cause of
the problem. Try using a battery-operated machine.

RadioShack sells a similar device. I've used it several times, and had
absolutely no problem.

 

[[email protected]]

I bought a cheap thingy off ebay that enables me to record one side of a
telephone conversation: this thing...
http://cgi.ebay.co.uk/Telephone-Cal...57238QQcmdZViewItemQQ_trksidZp1713.m153.l1262
Item number: 220321741431

it works ok but it causes a background buzz in the handset and it's
irritating when trying to have a phone conversation. The noise comes in
as soon as the audio jack plug touches any socket to record. Is there
any quickfix or handy gadget one can get that will eliminate this noise?
Here's a 13 second sample of it - starts with audio plug in, I pull the
plug out for a couple of seconds and then push it back in again.:
http://home.freeuk.net/tonj/buzz.mp3
thanks for any pointers.

It could be the wires on your phone are reversed. There is a right
and wrong way to connect them. Normally a red and a green on single
line systems. Try reversing them.
I this thing is plugged into an AC outlet, and dont have a ground
prong, reverse the plug in the outlet.

LM

 

[tg]

It could be the wires on your phone are reversed. There is a right
and wrong way to connect them. Normally a red and a green on single
line systems. Try reversing them.
I this thing is plugged into an AC outlet, and dont have a ground
prong, reverse the plug in the outlet.

thanks I tried that, no joy. I should mention this is a cisco ip phone,
not an ordinary phone and it is powered from the mains through a 48v
adaptor, so there's no disconnecting it from mains. Even if I disconnect
the ethernet cable and switch off everything else the buzz is still
there. At this moment I don't have a battery powered recorder, only
mains powered units. I think my only solution here is to find some way
or device that was specifically made to filter out this buzz, which I
think is a standard 50Khz mains buzz. I'm sure I saw something like this
once but can't remember where...