Headset Services Limited is the UK’s authorised Alpha helmet and spare part reseller. We are able to offer an array of spare parts as well as accessories at very competitive prices. Our highly skilled sales team are on hand if you require any further assistance, and please note that we only use spare parts supplied to us from the Original Equipment Manufacturer (OEM), all of which are supplied with a Certificate of Conformity.

Model M-7A Microphone

Code: 09168P-33

The Model M-7A is an Electret, noise-cancelling microphone designed to operate in place of carbon and amplified dynamic microphones. Provides clear, crisp voice transmission. It will not operate in circuits that do not supply a DC bias voltage. Most modern aviation communications equipment do supply this required voltage. If unsure, consult with your radio technical manual or with your local avionics shop.

Model M-7 / DC Microphone

Code: 09168P-31

The M-7/DC Electret Microphone is a noise canceling type designed to operate in place of carbon and amplified dynamic microphones. The microphone provides clear, crisp voice transmission while dramatically reducing omni-directional ambient noise. It will not operate in circuits that do not supply a DC bias voltage. Most modern aviation communications equipment do supply this required voltage. If unsure, consult with your radio technical manual or with your local avionics shop. It is intended for use with wire booms.

Microphone Windsock

Code: 40062G-02

Microphone and O-ring assembly ensure secure positioning over the microphone and provide clear, crisp voice transmission. Foam microphone protectors help remove unwanted, ambient sounds that are typically picked up by uncovered microphones. The foam prevents the condenser from picking up the sound of air moving across the mic. This helps eliminate a breathing or breathy sound, while also reducing clicks, pops and hiss. Minimum order quantity is 5.

M87 Dynamic Microphone

Code: M87 150 OHM

The M87 Dynamic Microphone can be attached to the Alpha helmet via the twin wire boom arm and microphone cable. The M87 is a moving voice coil type microphone and has a 150 Ohm impedance. It is intended to provide audio communications under high noise conditions found in military, civilian and general aviation aircraft.

Twin Wire Boom Arm (Silver)

Code: 439226SP

The twin wire silver boom arm is designed to attached to a helmet mount and secure an M7/DC or M87 microphone using the easily adjusted thumb screws. The boom arm assembly has a hinge to allow movement for the microphone to gain a suitable position.

Microphone Cable

Code: CX4434/U

The boom microphone cable is for connecting an M7/DC, M7/A and/or M87. The cable length is approximately 12 inches long and is terminated with U-173/U connectors on either end.

Visor Clear (Small)

Code: MP01011SP

The clear polycarbonate visor is for use with the Alpha Eagle helmet. The small visor is suitable for the Medium and Medium Long Alpha Eagle helmet. The visor is 3mm thick and has 3 holes on either side for the placement of the visor mechanism screws. The clear visor is ideally suited for open co-pit flying and can be locked into place providing impact protection.

Visor Clear (Medium)

Code: MP01012SP

The clear polycarbonate visor is for use with the Alpha Eagle helmet. The medium visor is suitable for the Medium Broad and Large Alpha Eagle helmet. The visor is 3mm thick and has 3 holes on either side for the placement of the visor mechanism screws. The clear visor is ideally suited for open co-pit flying and can be locked into place providing impact protection.

Visor Yellow (Small)

Code: 2MP3113SP

The yellow polycarbonate visor is for use with the Alpha Eagle helmet. The small is suitable for the Medium and Medium Long helmet. The visor is 3mm thick and has 3 holes on either side for the placement of the visor mechanism screws. The yellow visor is ideal flying in poor visibility when the result of a combination of fog and/or clouds moving in which, in combination with snow, cause what is referred to as a 'white-out'.

Visor Yellow (Medium)

Code: 2MP3114SP

The yellow polycarbonate visor is for use with the Alpha Eagle helmet. The medium is suitable for the Medium Broad and Large helmet. The visor is 3mm thick and has 3 holes on either side for the placement of the visor mechanism screws. The yellow visor is ideal flying in poor visibility when the result of a combination of fog and/or clouds moving in which, in combination with snow, cause what is referred to as a 'white-out'.

Visor Tinted (Small)

Code: MP01013SP

The tinted polycarbonate visor is for use with the Alpha Eagle helmet. The small visor is suitable for the Alpha Eagle helmet when only requiring one visor. The visor is 3mm thick and has 3 holes on either side for the placement of the visor mechanism screws. The tinted visor is ideal for flying in sunny weather as it will offer glare protection.

Visor Tinted (Medium)

Code: MP01014SP

The tinted polycarbonate visor is for use with the Alpha Eagle helmet. The medium visor is suitable for the Medium and Medium Long Alpha Eagle helmet. The visor is 3mm thick and has 3 holes on either side for the placement of the visor mechanism screws. The tinted visor is ideal for flying in sunny weather as it will offer glare protection.

Visor Tinted (Large)

Code: MP01015SP

The tinted polycarbonate visor is for use with the Alpha Eagle helmet. The large visor is suitable for the Medium Broad and Large Alpha Eagle helmet. The visor is 3mm thick and has 3 holes on either side for the placement of the visor mechanism screws. The tinted visor is ideal for flying in sunny weather as it will offer glare protection.

Rigid Visor Cover (M/ML)

Code: MP01019SP

The Semi Rigid Visor Cover is used to protect the polycarbonate visors when not in use. The visor mechanism will allow the visors to retract underneath the cover. This visor cover is 5mm thick and would be able to fit a Medium or Medium Long Alpha Eagle helmet.

Rigid Visor Cover (MB/L)

Code: MP01020SP

The Semi Rigid Visor Cover is used to protect the polycarbonate visors when not in use. The visor mechanism will allow the visors to retract underneath the cover. This visor cover is 5mm thick and would be able to fit a Medium Broad or Large Alpha Eagle helmet.

Rigid NVG Visor Cover (M/ML)

Code: MP01120SP

The carbon-fibre Rigid Visor Cover supports the ANVIS 9 Night Vision Aviator's Goggles and is used to protect the polycarbonate visors when not in use. The visor mechanism will allow the visors to retract underneath the cover. This visor cover is 5mm thick and would be able to fit a Medium or Medium Long Alpha Eagle helmet.

Rigid NVG Visor Cover (MB/L)

Code: MP01121SP

The carbon-fibre Rigid Visor Cover supports the ANVIS 9 Night Vision Aviator's Goggles and is used to protect the polycarbonate visors when not in use. The visor mechanism will allow the visors to retract underneath the cover. This visor cover is 5mm thick and would be able to fit a Medium Broad or Large Alpha Eagle helmet.

Velveteen Visor Cover

Code: 2MP1384SP

The Velveteen Cover is a one size fits all and attaches to the Alpha Eagle helmet via snap fasteners and is able to protect and cover two visors. Available in the colour Black only.

Receiver 300 Ohm

Code: MP01026SP

This speaker, which is often referred to as a Transducer and/or a Receiver provides an efficient, highly reliable earphone. It is made of a rugged insert of light weight construction and can connect to a typical wiring loom by the two screw connection points. This version has an impedance of 300 Ohm and is sold separately.

Receiver 1200 Ohm

Code: MP01027SP

The speaker, which is often referred to as a Transducer and/or a Receiver provides an efficient, highly reliable earphone. It is made of a rugged insert of light weight construction and can connect to a typical wiring loom by the two screw connection points. This version has an impedance of 1200 Ohm and is sold separately.

Coiled Downlead with UK NATO Plug

Code: MP01034SP

The loom is ideally designed to work with the Alpha range of helmets and is extremely easy to install. The high quality loom comes complete with connections for speakers and microphone and has a coiled cable with UK NATO plug. The length of the coiled cable un-stretched is approximately 1 metre, and can be extended to 2 metres.

Straight Downlead with UK NATO Plug

Code: MP01041SP

The loom is ideally designed to work with the Alpha range of helmets and is extremely easy to install. The high quality loom comes complete with connections for speakers and microphone and has a straight cable with UK NATO plug. The length of the straight cable is approximately 1 metre.

Coiled Downlead with U174 Plug

Code: MP01031SP

The loom is ideally designed to work with the Alpha range of helmets and is extremely easy to install. The high quality loom comes complete with connections for speakers and microphone and has a coiled cable with U174 plug, also referred to as a US NATO plug. The length of the coiled cable un-stretched is approximately 1 metre, and can be extended to 2 metres.

Coiled Downlead with 8 Pin Lemo Plug

Code: HSMP3928C

The loom is designed to work with HSL's ANR Kit and can be installed into the Alpha range of helmets. The high quality loom comes complete with connections for the ANR modules and microphone and has a coiled cable with 8 Pin Lemo Plug. The length of the coiled cable is approximately 1 metre. This loom can also support the 6 Pin Redel Plug (Code: HSMP3928C-REDEL).