[I'm not sure if this newsgroup is still alive, but here goes.] This week I finally installed my OldBird 21c microphone and I'm having some noise issues. In my setting I use a Marantz solid state recorder for my recordings. When I power this recorder with its standard AA batteries, things are fine but it does not allow me to record for more than a few hours. When I use AC power for the recorder instead, a lot of noise shows up at 1500Hz, 1620Hz, 1740Hz, 1860Hz, etc. Likely this has to do with the fact that the recorder and the OB21c microphone use the same AC outlet.
What is the best solution to this problem? Thanks Wim van Dam Solvang, CA, USA -- NFC-L List Info: Welcome and Basics � http://www.northeastbirding.com/NFC_WELCOME Rules and Information � http://www.northeastbirding.com/NFC_RULES Subscribe, Configuration and Leave � http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm Archives: The Mail Archive � http://firstname.lastname@example.org/maillist.html Surfbirds � http://www.surfbirds.com/birdingmail/Group/NFC-L Birding.ABA.Org � http://birding.aba.org/maillist/NFC Please submit your observations to eBird! ��http://ebird.org/content/ebird/ --