Zoom H4, and batteries, trouble?

Mikkel Nielsen · 8th April 2009

Hi there

Last night I was hoping to do a worldizing session with some stuff I needed for a short.
I was using a borrowed H4, running on batteries.
I plugged in my Mkh416, turned on the phantom power, and heard this constant high pitched tone, through my headphones???
Turned off the phantom, and the tone was gone.
Needless to say, the session was completely useless.
I tried to put regular power to the H4 when I got home, and everything was fine.

Any of you can help me with this one?

Best wishes and thanks.

Mikkel

riffster · 8th April 2009

This has happened to me before with similar units and onboard phantom power from video cameras. I had to eq, notch out the offending freq.

Mikkel Nielsen · 8th April 2009

Thanks alot for helping me out riffster.
Unfortunately this tone is so present in volume, that I wouldnt be able to eq it away!

Mikkel

Fran Guidry · 8th April 2009

You can check the Zoom forum Zoom Gear & Home Recording Forum • View forum - Zoom H4, H4n & H2 to see if there's been a firmware upgrade to address that issue.

If not, I seem to recall that an external battery pack is a workaround. Cobble something up that provides the same voltage as the H4 wall wart and apparently that gets around the offending circuit.

Or get the new Zoom H4n which has eliminated the issue.

Fran

Mikkel Nielsen · 8th April 2009

Thanks alot Frank.
I´ll check it out

Best wishes,

Mikkel

8th April 2009	#1
Mikkel Nielsen Gear addict Joined: Dec 2005 Posts: 328 Thread Starter	Zoom H4, and batteries, trouble? Hi there Last night I was hoping to do a worldizing session with some stuff I needed for a short. I was using a borrowed H4, running on batteries. I plugged in my Mkh416, turned on the phantom power, and heard this constant high pitched tone, through my headphones??? Turned off the phantom, and the tone was gone. Needless to say, the session was completely useless. I tried to put regular power to the H4 when I got home, and everything was fine. Any of you can help me with this one? Best wishes and thanks. Mikkel Last edited by Mikkel Nielsen; 8th April 2009 at 01:42 PM.. Reason: spelling:)

8th April 2009	#4
Fran Guidry Gear maniac Joined: Apr 2004 Location: Walnut Creek, CA, USA Posts: 249	You can check the Zoom forum Zoom Gear & Home Recording Forum • View forum - Zoom H4, H4n & H2 to see if there's been a firmware upgrade to address that issue. If not, I seem to recall that an external battery pack is a workaround. Cobble something up that provides the same voltage as the H4 wall wart and apparently that gets around the offending circuit. Or get the new Zoom H4n which has eliminated the issue. Fran __________________ E ho`okani pila kakou ma Kaleponi Slack Key in California - www.kaleponi.com Homebrewed Music - recording fingerstyle acoustic guitar at home

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8th April 2009	#2
riffster Gear maniac Joined: Aug 2006 Location: Cleveland, Oh Posts: 228	This has happened to me before with similar units and onboard phantom power from video cameras. I had to eq, notch out the offending freq.

8th April 2009	#5
Mikkel Nielsen Gear addict Joined: Dec 2005 Posts: 328 Thread Starter	Thanks alot Frank. I´ll check it out Best wishes, Mikkel