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Thank you, I am going to look into that today. The Impedence transformer I bought from a music shop, I thought they might know what they are doing, but again this is camera tech and not music, so maybe it could have been a mistake easily overlooked.
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How can I find out the impedence that my camera is looking for so I can match it up to the mic? It is a pana 852...
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Unfortunately, I could not find it in the manual. I have email Pana and hope they get back to me about it. I wanted to phone, but I was on hold for about 20 minutes, paying the long distance charges...
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lol! Aint that the tooth.
I am looking thru the manual again, I will see what comes up. Thanks for all your help and support Steve., |
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The xformer I'm talking about is <$40 from BH Photo ... http://www.bhphotovideo.com/bnh/cont...ughType=search |
Got this message back from Panasonic :
Thank you for your email. In regards to the mic input on the camera all that is listed for it is the sensitivity which is -50 DB. In the case of the camera a 4Ohm impedance mic should be just fine in the device so long as it has the appropriate adaptor to physically fit in the device. Best Regards, Panasonic Canada Inc Customer Care Centre SM |
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I am guessing it is
40 Ohm, |
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I emailed them back about this, and your response - but I haven't heard anything yet Steve. Hoping by next week!
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RE: Panasonic, you have encountered the incompetence and willingess to pull facts and advice out of the air that is typical of well-meaning customer service people. Because of the nature of the circuits they feed, cam mic jack inputs are relatively high; typically around 15K. Personally, I've never seen one spec'd at below 5K.
Equivalence between mic output impedance and cam input impedance is not the ideal. That would deliver the most power, but not the most voltage. Cam mic input circuits are voltage driven. You want the impedance of the mic to be on the order of about 1/10 or less of the cam input. That way most of the voltage developed by the mic is dropped across the cam input, not the mic innards. So any mic in the range of 150 to 600 ohms should be fine. The matching transformer that Steve mentions can help a bit with signal level because as it steps up the impedance it also steps up the voltage. I think of hiss as electron traffic noise occuring at the molecular level in conductors and electronic components. It's often high when oxidation occurs in connections that are made between surfaces in contact, or at high resistance points like connections that are almost broken. Well chosen materials and designs in minimize it. If the mic and the cam aren't inherently noisy, it could be cheap or faulty cables. If all else fails, SoundSoap is pretty good at removing such noise. |
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