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Author Topic: RA195 Military Headset Cable Pinout  (Read 2605 times)
OE5EWL
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Posts: 3




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« on: November 24, 2013, 01:30:56 AM »

Hi,

I recently got a Clansman/Racal R195 headset. But sadly without the connector fitted, only the cable...
As this is a nice headset with reportedly good audio I'd like to put it in active use. Maybe one of you can help out with the color-coding of the connection cable? So far I found out: White should be ground for the headphones, blue the right ear and orange the left ear. Mic could be red. My headset has the ANR option fitted, so where to apply the 18v?

Regards and 73, Wolfgang - OE5EWL Sad

PS: I asked google already, but nothing turned up. Maybe I used the wrong search terms, but I tried a lot.
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G3RZP
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Posts: 4477




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« Reply #1 on: November 24, 2013, 02:12:38 AM »

From memory, the microphone capsule is red with a coloured stripe. The sort of microphone - dynamic, carbon etc depends on the stripe colour. The best bet for info is the Vintage and Military Amateur Radio Society, VMARS. There's likely to be someone there who knows - they may even have the info on their web site.
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W9GB
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Posts: 2616




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« Reply #2 on: November 24, 2013, 12:06:38 PM »

Esterline Technologies Corporation
500 - 108th Avenue NE, Suite 1500
Bellevue, WA 98004
http://www.esterline.com

Support for Rest of World (excluding USA):
http://www.esterline.com/communicationsystems/ContactUs/ContactRacalAcoustics.aspx
Racal Acoustics Ltd.
Waverley Industrial Park
Hailsham Drive
Harrow HA1 4TR
U.K.
Tel. +44(0)20 8515 6200
Fax +44(0)20 8427 0350

RA195 Combat ANR Headset
http://www.esterline.com/communicationsystems/PersonalCommsProtection/MediumHighNoiseHdsts/RA195CombatANRHeadset.aspx
Originally designed for the British Army Mk VI combat helmet,
the RA195 has been field proven and has received a number of product improvements.

RA195 i-Combat Headset
http://www.esterline.com/communicationsystems/PersonalCommsProtection/MediumHighNoiseHdsts/RA195iCombatHeadset.aspx
The i-Combat Infantry headset is based on the in-service British Army RA195 Combat. The headset has proven acoustic performance capable of meeting the latest health & safety legislation in high noise levels such as those found in V430 and Warrior vehicles.

Racal Acoustics History
http://www.esterline.com/communicationsystems/Overview/History/RacalAcoustics.aspx
In June 2000, Thomson-CSF acquired Racal and in December 2000 renamed the group of companies Thales Defence Limited.

In March 2004, Thales announced the sale of the Acoustics Division to J.F Lehman and Company, which resulted in the reforming of Racal Acoustics. Following very successful sales growth and profit, the company ownership again changed when ECI Partners, the UK mid-market acquisition specialist, backed a management buy-out in July 2005.

In December of 2008, Racal Acoustics was acquired by Esterline Corporation and became part of its Communications Systems platform.
« Last Edit: November 24, 2013, 12:15:57 PM by W9GB » Logged
OE5EWL
Member

Posts: 3




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« Reply #3 on: November 25, 2013, 02:43:58 AM »

Dear OM,

many thanks for your information. I dropped notes to VMARS and easterline already. If I get some information back, I'll post it here. Maybe someone else is interested.

Regards,
 Wolfgang OE5EWL
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OE5EWL
Member

Posts: 3




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« Reply #4 on: November 27, 2013, 11:29:33 PM »

Hi Folks:

As far I found out via various Measurings and some Informations I got:
Pin   Color    Text
A     red      Microphone +
B     green    Microphone -
C     n/c?     not used here?
D     orange   Left Headphone +
E     white    Common Ground except Microphone
F     black    DC+ input for ANR circuit
G     blue     Right Headphone

Things I found out:

a) The Microphone is completely on its own; no ground connections to somewhere else. It seems that this needs no bias voltage?
b) The headphones work without DC input on the black wire too, but at low volume. With DC supply the sound is not hifi, but really nice.
c) DC Input works from about 12V onwards, I believe 24V and up are originally supplied in military gear.
d) The ANR works nice but tends to hum if the headset is not reassembled carefully. The hum has nothing to do with the DC input Voltage. Even on battery use with a signal generator als Sound Device hum occours.
e) The Microphone sounds a bit tinny, but I think this not the badest thing in the headsets native environment. Reports were (besides my voice sounded like through a pringles-chips-can) good.
f) You definately want to use some kind of wind blocker on the mic. Every black foam-thingy that fits on the boom mic should work.

If someone has further suggestions, it'd be great.
I hope someone else can use this.

73 es 55 Wolfgang OE5EWL
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