On Tue, 4 Mar 2003 22:32:54 +0000 (UTC), "Maurice" <maurice_vidents@btconnect.com> wrote:

[...]

>One thing I had discovered early on was that some electret external mics

>connected to the 100 gave a very noticeable hum, even a Sennheiser, whilst

>others didn't. No rhyme or reason that I could see. I just had to make a

>note of which mics I could and couldn't use. The cleanest sound came from

>using the Sony mic off my DSR 300 which makes one wonder if Sony hasn't

>built in some fiendish bit of circuitry to make sure everyone uses their

>mics!. Dynamic mics don't seem to have that problem

The VX2000 also shows this effect - but it turns out not

to be an electrical problem but a mechanical one. When I

physically better-isolate my Sennheiser MKE-300 by removing

it from the shoe, or by placing a vibration-isolator between

it and the shoe, the "hum" goes away. BTW, you can feel

this "hum" as a faint vibration while holding the camera

while it is in "camera" mode with tape in...

[was the PD100A adapter box used...?]