(sold for      intercom function only,      in NZ)           

This is probably one of the better value for money  pillion to rider intercoms available in NZ at the moment.         It is easy to use, easy to install into your helmet without  damage or modifications, Runs on 3 alkaline  AA penlight cells, and has either PTT via a handlebar switch  or side button on the unit and has an user adjustable VOX mode 

These are 5 channel synthesised lightweight, compact, short range radios operating in   the  USA 49Mhz band. They consist of a small pocket size unit containing the 3 "AA" size batteries and radio and a 800mm cable connecting the adaptable microphone-headset unit. The radios have five, thumbwheel selectable frequencies, volume control ( only for the radio, not the intercom  volume as  this is preset inside the unit )  and variable vox sensitivity.

They also have an integral "Push to Talk" button and a "PTT" extension cable, which could be attached to the handlebar of a motorcycle and activated via a thumb. The sets are switchable from automatic (vox operation) to manual (PTT). There is a "Low Battery" indicator light that comes on when the batteries get down to 3.2 Volt and should be replaced.   

The unit has the  facility to plug in an extra headset to enable a rider and  pillion to communicate (optional pillion headset is supplied ) when switched to "Intercom mode" the pillion headset/rider function does not have "access" to the the radio transceiver .

The headset assembly consists of a detachable boom microphone, whip antenna and earphone. The unit comes supplied with Velcro strap to attach the remote "PTT" thumb-switch to the handle bars and self adhesive Velcro patches to enable the detachable short flexible whip antenna, boom microphone and earphone to be affixed to a motorcycle or safety  helmet, comfortably.         

The  unit can be placed in a convenient pocket or clipped to the belt at the waist. Note: this  radio equipment is not waterproof, so place the unit in a good quality zip lock bag. The headset components are not quite so fragile and would be somewhat protected from rain if fitted to a full face helmet.                   For proper Vox use it is almost necessary to install this unit inside a full face helmet

Acoustically, a full face helmet is much more quiet than an open face helmet due to the lower wind and engine noise on the open microphone etc. You will experience more false triggering with an open-face helmet, because of ambient noise ,ie engine and wind, this may  require the use of the manually operated handlebar mounted PTT button.

MORE VOLUME : If you are going to run the Maxon HX-49 purely as  a  rider pillion unit with the radio part disabled ( unsolder one leg of the 10.240 MHz reference  crystal)  then the volume in the headsets of the unit can be increased markedly by turning up the deviation control!! ( very small white variable resistor in the centre of the circuit board) (see picture)                 Mark its position with an indelible marker BEFORE you move it so you can put it back to how it was if needed! 

                HX-49  circuit board                           Deviation control ( affects intercom headset volume)

 The receiver volume control has no effect on the intercom function,  how ever the volume control can be implemented with a few circuit modification.  if this is really required email  me about this,  it is not difficult to do.

Specifications: ( radio transceiver disabled for NZ sales)

power source:                       4.5V "3 AA Batteries"  (alkaline type recommended)

frequency range:                   USA (49 MHz) a 49.830,b 49.845,c 49.860,d 49.875,e 49.890        

  49 Mhz is Ch 1 TV here in NZ and only TV is allowed on these frequencies ! forget the possibility of talking through your neighbor's TV they are too low power to do that! However you will RECEIVE interference from the very high power TV transmitters on that frequency, , all you hear on the HX-49 is    BUZZ  HISS  BUZZ GARBLE GARBLE  *?!#%&  it  gets bloody annoying ! and which makes the two way radios almost unusable!

Current drain:                          Transmit 40 mA, Receive 30 mA, Standby 20 mA  .                            Weight:                                   6 oz nominal (no Batteries)  

Size :                  1" thick ,5.5" long by 3" wide                                                 

Receiver:            Dual conversion superhet first IF at 10.7 MHz, second 455 kHz     Transmitter:                                Synthesised true FM  with     RF output    +10dBm (10 mW)         deviation of 4.5 kHz                            Stability:              +/- 2 kHz  over -10 C to   +50 C                                              Sensitivity:         1 uV for 20 dB         unsquelched   1 uV (not user adjustable!)

PTT:                   Internal and by Remote  cable (supplied)

Vox:                   User variable preset and manual over-ride                             

Range:                Quoted as around 200-400 meters line of sight with no obstacles, less in foliage and                            buildings or from in vehicles. Motor cycles tend  to get line of  sight range on the                            open  road.                       

Intercom:         by user selected switch on case and connected optional  pillion headset ( supplied)