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  #1  
Old 06-13-2008, 05:46 PM
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born2fly born2fly is offline
 
Join Date: Aug 2007
Location: Los Gatos, CA
Posts: 80
Default Tip: Headset Power

I cooked up a simple scheme for letting ship's power drive my headsets. They happen to be Zulu, but this will work for any headsets that use AA batts.

Get a DC-DC converter (I got mine from Digikey). For the Zulus, it has to be a fully isolated one, they will barf if you connect power to ship's ground.

Wire up the DC-DC converter with appropriate capacitors and connectors. I also put a bleed load on mine. Mount the connectors near your headset jacks.

Cut some 1/2" wooden dowling to the same length as an AA battery. Drill it through lengthwise and string a wire up through the hole. Put a screw into one end and that's your first battery contact-turned-ship's-power-erminal. Do it twice and you have the other terminal. Mark the dummy-batteries for how they get inserted.

I ended up mounting mine inside the center post between the seats. Hooray, no more headset batteries, no more running out of ANR mid-flight, no more nagging passengers to turn off the headset.

Some headsets, like the Zulus, have to be manually turned on every flight. No big deal.

I do not have a schematic, so please don't ask. This setup is really easy for anyone that knows which end of a soldering iron to hold. I couldn't get Flickr to host the image of the pieces, but here's a link:
http://www.flickr.com/photos/illesg/2510424852/

Have fun,
G.
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Greg Illes, RV6 - N164JH
RHV, San Jose CA
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  #2  
Old 06-13-2008, 06:06 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,570
Default I power mine off the intercom.

My PS1000II intercom has a 9 volt output pin. Many ANR headsets work on 9 volts.
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Mel Asberry..DAR since last century
A&P/BGI/EAA (LifeTime) Tech Counselor/Flight Advisor/Nat'l Test Pilot School
Specializing in Amateur-Built and Light-Sport Aircraft
<rvmel(at)icloud.com>
North Texas (8TA5)
RV-6 Flying since 1993, 172hp O-320, 3-Blade Catto (since 2003)Sold
Legend Cub purchased 12/2017
FRIEND of the RV-1
Eagle's Nest Mentor
Recipient of Wright Brothers "Master Pilot" Award
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  #3  
Old 06-13-2008, 06:12 PM
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born2fly born2fly is offline
 
Join Date: Aug 2007
Location: Los Gatos, CA
Posts: 80
Default Differences

That intercom power sounds super-handy.

All the Lightspeeds I've had were 2-AA types. But the general approach is the same, you just cook up a suitable power level, run connectors to the right place, then dummy-up the battery(ies) that your unit needs.

If the headset already has an auxiliary-power input (mine didn't), you get to skip the dummy-battery step.

G.
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  #4  
Old 06-13-2008, 06:34 PM
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born2fly born2fly is offline
 
Join Date: Aug 2007
Location: Los Gatos, CA
Posts: 80
Default Pix

Just figured out how to post images from Flickr.
Here are the pieces of the kit I described:



The two little black objects are panel-mount power connectors. The faux-battery cable plugs into one of them. Circuit board mounts wherever.

G.
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