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David & Clark conversion?



 
 
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  #1  
Old January 1st 05, 07:24 PM
Greg Copeland
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Default David & Clark conversion?

My brother is a helicopter pilot in the military. He gave me a D&C
H10-76XL headset. I understand that there is an impedance issue with
using a military headset in GA. So, I began looking for an impedance
adapter. In doing so, I found what I thought I needed. But, after
doing a little more checking, I'm finding that the H10-76 and H10-76XL,
specifically, are said not to work with the impedance adapter. In stead,
some sites recommend simply getting a heli-GA plug and replace the
dynamic mic with an electret mic. I've done some googling and find
conflicting reports, so it's hard to know for sure exactly what I need.
In some old posts, some people say that the adapter will work while others
say they won't; following up with supporting statements that the mic does
have to be replaced.

Any so, now my questions. Does this mean that my headset is actually a
high impedance headset? If not, why don't I need an impedance adapter?
Why would I need to replace the mic? Can I simply get away with using the
dynamic mic? If not, what's involved with replacing a mic on this
headset? Soldering required, or can I simply unplug the old mic and plug
in the new one? If I send it into D&C, what would it cost to have them do
the conversion? Estimates?

Thanks in advance!

Best Regards & Happy New Year,

Greg

  #2  
Old January 5th 05, 03:45 AM
SSG B
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Default

all you need to do is get the conversion plug for the U-78 cord to a general
aviation cord, and then get an electret mic and install it. I did it on
mine, and it works great. I got the cord from www.Sportys.com and the mic's
from www.pilotmall.com I believe...Good luck.

"Greg Copeland" wrote in message
news
My brother is a helicopter pilot in the military. He gave me a D&C
H10-76XL headset. I understand that there is an impedance issue with
using a military headset in GA. So, I began looking for an impedance
adapter. In doing so, I found what I thought I needed. But, after
doing a little more checking, I'm finding that the H10-76 and H10-76XL,
specifically, are said not to work with the impedance adapter. In stead,
some sites recommend simply getting a heli-GA plug and replace the
dynamic mic with an electret mic. I've done some googling and find
conflicting reports, so it's hard to know for sure exactly what I need.
In some old posts, some people say that the adapter will work while others
say they won't; following up with supporting statements that the mic does
have to be replaced.

Any so, now my questions. Does this mean that my headset is actually a
high impedance headset? If not, why don't I need an impedance adapter?
Why would I need to replace the mic? Can I simply get away with using the
dynamic mic? If not, what's involved with replacing a mic on this
headset? Soldering required, or can I simply unplug the old mic and plug
in the new one? If I send it into D&C, what would it cost to have them do
the conversion? Estimates?

Thanks in advance!

Best Regards & Happy New Year,

Greg



  #3  
Old January 5th 05, 03:53 AM
SSG B
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Posts: n/a
Default

Also, there is no need to solder...just a jewler's screwdriver to loosen
the tiny screws in the mic. I also had to bore out the holes on the new
electret mic's to fit the bushing on the David Clark mic boom. Be careful if
you are using a hand drill, as it's really easy to crack the mic assy...As
far as the impedence issue, I really don't know, but I have flown with it
for about 5 hours now in a Cessna 172 and I have not noticed any problems so
far.


  #4  
Old January 7th 05, 01:03 AM
Greg Copeland
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Default

On Tue, 04 Jan 2005 20:45:51 -0600, SSG B wrote:

all you need to do is get the conversion plug for the U-78 cord to a general
aviation cord, and then get an electret mic and install it. I did it on
mine, and it works great. I got the cord from www.Sportys.com and the mic's
from www.pilotmall.com I believe...Good luck.


First, let me say thanks for replying!

By any chance, did you look at using this? This is what D&C came back and
recommended.
http://www.davidclark.com/Store/Prod...x?productID=41

But you're saying that you used something like this:
http://www.mypilotstore.com/mypilotstore/sep/1251
with a mic like this:
http://www.mypilotstore.com/mypilotstore/sep/2162

If I did it my self, it looks like it will cost ~$82.00 + shipping. If I
order directly from D&C, it will cost ~$130.00. Hmmm...

I'm thinking the new mic sounds pretty good! That about what you paid?

Thanks again,

Greg




  #5  
Old January 27th 05, 01:52 PM
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Default

That's what I did.

I did pay around $80.00 to convert it.


 




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