Bose a20 into alpha eagle 900

Gizmos and gear used in Helicopter Op's
Izzy17
New Member
New Member
Posts: 6
Joined: Oct 2012

Bose a20 into alpha eagle 900

Postby Izzy17 » Fri May 31 2013, 10:46

Hello, is it possible to install Bose a20 coms into a alpha eagle 900 helmet?
User avatar
Twistgrip
4th Dan
4th Dan
Posts: 1048
Joined: Sep 2006

Re: Bose a20 into alpha eagle 900

Postby Twistgrip » Fri May 31 2013, 12:11

Yes:). I had a buddy of mine do it last fire season, I was lucky enough to wear his coveted helmet with the conversion and it sounded just like a Bose believe it or not!.
"You can watch things happen, you can make things happen or you can wonder what happened"
User avatar
Ben Slocombe
Silver Wings
Silver Wings
Posts: 33
Joined: Dec 2012

Re: Bose a20 into alpha eagle 900

Postby Ben Slocombe » Fri Sep 19 2014, 03:23

Has anyone else done this and converted a 900 with A20 comms? Any advice on how I go about getting this done?
Is it possible to do it yourself?

Cheers,
Ben
User avatar
James Hall
Silver Wings
Silver Wings
Posts: 44
Joined: Aug 2008

Re: Bose a20 into alpha eagle 900

Postby James Hall » Fri Sep 19 2014, 03:37

I have done it myself with Zulu lightspeed, but also looked at the A20...even easier! As the cable is external to the head band, very simple to dismantle and install in the helmet. Then just a matter of soldering the existing mic from helmet, probably a gentex electret into the headset ear cup cable/connector. No doubt will void warranty on A20 because of the modification, but will make a far better setup than standard alpha gear. Just be mindful that the Bose cups are slightly thicker than the standard alpha ones, so if your helmet already is quite snug width wise, u may not fit the cups in. I can no longer use my comfort liner after the retro fit as simply not enough room, and the tightening mechanism is nearly redundant also.
colby
Silver Wings
Silver Wings
Posts: 21
Joined: Mar 2009

Re: Bose a20 into alpha eagle 900

Postby colby » Fri Sep 19 2014, 07:22

I did it approx 12 months ago. I was disappointed with the quality of the ANR in my new Alpha helmet and was about to throw it away but I thought I would try fitting the Bose headset guts into the helmet. Works well best move Ive made in a long time.

Colby.
User avatar
Jabberwocky
2nd Dan
2nd Dan
Posts: 422
Joined: Dec 2007

Re: Bose a20 into alpha eagle 900

Postby Jabberwocky » Fri Sep 19 2014, 08:09

How has the ANR worked in doors off scenarios in comparison to normal Alpha ANR?
agrimuster
Silver Wings
Silver Wings
Posts: 13
Joined: Sep 2013

Re: Bose a20 into alpha eagle 900

Postby agrimuster » Fri Sep 19 2014, 08:33

I have done this with the Lightspeed, it works just fine doors off. As does my friends Bose/alpha set up. The Bose has thinner ear cups than the Zulu and is easier to pull apart. If I was doing it again I'd go with Bose. We are both using the original mic btw.
Learn from others mistakes as you wont live long enough to make them all yourself
User avatar
Ben Slocombe
Silver Wings
Silver Wings
Posts: 33
Joined: Dec 2012

Re: Bose a20 into alpha eagle 900

Postby Ben Slocombe » Fri Sep 19 2014, 13:33

agrimuster wrote:I have done this with the Lightspeed, it works just fine doors off. As does my friends Bose/alpha set up. The Bose has thinner ear cups than the Zulu and is easier to pull apart. If I was doing it again I'd go with Bose. We are both using the original mic btw.


The reason I want to install the Bose gear is because I'm having a hard time with the mic. Flying doors off and have to turn the squelch up high to get rid of the wind noise but with the squelch high I can't communicate clearly with my crew member. I have more mic trouble with doors on than I do with doors off. And my bose ANR was fine with doors off. Does anyone have any suggestions as to what I can do about this? Is there any adjustment I can make on the helmet?
Guy Incognito
Silver Wings
Silver Wings
Posts: 42
Joined: Jun 2010

Re: Bose a20 into alpha eagle 900

Postby Guy Incognito » Fri Sep 19 2014, 18:51

Wrap some thicker foam around your mic.
agrimuster
Silver Wings
Silver Wings
Posts: 13
Joined: Sep 2013

Re: Bose a20 into alpha eagle 900

Postby agrimuster » Fri Sep 19 2014, 21:27

I would install the Bose, the avionics are so much better all around.
Learn from others mistakes as you wont live long enough to make them all yourself
User avatar
Ben Slocombe
Silver Wings
Silver Wings
Posts: 33
Joined: Dec 2012

Re: Bose a20 into alpha eagle 900

Postby Ben Slocombe » Sat Sep 20 2014, 00:24

agrimuster wrote:I would install the Bose, the avionics are so much better all around.


Did using the Alpha mic make any difference to using a Bose mic?
agrimuster
Silver Wings
Silver Wings
Posts: 13
Joined: Sep 2013

Re: Bose a20 into alpha eagle 900

Postby agrimuster » Sat Sep 20 2014, 02:01

I haven't seen them with the eagle mic
Learn from others mistakes as you wont live long enough to make them all yourself
User avatar
hoverthrust
Gold Wings
Gold Wings
Posts: 144
Joined: Aug 2010

Re: Bose a20 into alpha eagle 900

Postby hoverthrust » Sat Sep 20 2014, 14:44

Anyone got information on how to do the bosea20 into alpha eagle? I'm curious as a friend tried the lite speed and ended up with a bunch of parts it wouldn't fit. Any tips on what parts to dismantle?
HeliC
Silver Wings
Silver Wings
Posts: 23
Joined: Jan 2011

Re: Bose a20 into alpha eagle 900

Postby HeliC » Sat Sep 20 2014, 22:28

Ben, I've seen both issues. The mic problem you are having I've had new pilots start with their brand new alpha helmet and we had to put a wrap of masking tape around the mic under the foam because they do not have the adjustment like the old mics. This seemed to fix the problem, but one pilot did say he had to take it off when he was out on his own later on.
The bose we put into a eagle in about 30 minute in the lounge room, some velcro tape and a screw driver. The hole for the mic had to be drilled a little bigger is about as hard as it got. Works really well in all situation.
SIR_SMP
Gold Wings
Gold Wings
Posts: 163
Joined: Jun 2009

Re: Bose a20 into alpha eagle 900

Postby SIR_SMP » Sun Sep 21 2014, 22:01

I have an Alpha 900 fitted with an electrec mic from a gentex (with the foam) and I have no problems with the doors off, maybey try that first as its a pretty cheap and easy changeover

my 900 has the factory ANR which is ok but it chews through batteries (3x 9V) every couple of hours but it does not compare to the Bose that's for sure

Question for you guys doing the conversion, are you stuffing the guts into the alpha cups or transferring the whole cups etc into the helmet?
agrimuster
Silver Wings
Silver Wings
Posts: 13
Joined: Sep 2013

Re: Bose a20 into alpha eagle 900

Postby agrimuster » Sun Sep 21 2014, 23:19

Transfer the ear cups much easier
Learn from others mistakes as you wont live long enough to make them all yourself
OldAviator
New Member
New Member
Posts: 3
Joined: Oct 2014

Re: Bose a20 into alpha eagle 900

Postby OldAviator » Mon Oct 6 2014, 15:07

I've asked Bose about installing A20 ear cups in a helmet.
They told me there was no reason it wouldn't work, but they didn't think it would pass a lateral (ear cup) impact test.

According to the US Army, 30% of helmet impacts are on the side of the helmet.
With rigid ear cups, the result is often a basal skull fracture.
That is why the US Army developed energy-absorbing ear cups (25 years ago) that crush when struck in an accident.
They work like the crumple zone in a car.
I think Australian Army helmets have energy absorbing ear cups, too.

I don't know if the Bose ear cup is rigid. It doesn't matter much in a headset but does in a helmet.
Also, the ANR stuff inside the ear cup might prevent the ear cups from crushing.

Be careful before you mess with your helmet.
It's not only the helmet shell that protects you.
It is the crushable stuff inside the shell that absorbs energy and saves you.
Dahamburglar
New Member
New Member
Posts: 1
Joined: Jan 2019

Re: Bose a20 into alpha eagle 900

Postby Dahamburglar » Wed Jan 2 2019, 05:24

What do you attach the a20 ear cups to in the helmet?
SIR_SMP
Gold Wings
Gold Wings
Posts: 163
Joined: Jun 2009

Re: Bose a20 into alpha eagle 900

Postby SIR_SMP » Sat Mar 9 2019, 22:29

Anyone can hack a headset into a helmet but to do this properly requires some specialist knowledge and parts which I have spent a long time developing

If anyone wants a bose into an alpha or Gallet PM me
Attachments
659D1520-E55B-4FFE-B63D-C2B45EE75899.jpeg
659D1520-E55B-4FFE-B63D-C2B45EE75899.jpeg (41.37 KiB) Viewed 267 times

Return to “Equipment”

Who is online

Users browsing this forum: No registered users and 1 guest