Article by Alex Varv
The Rino 120 GPS/Radio by Garmin
)belongs to a new generation of instruments. It was designed to enable the owner to communicate with others and to navigate as well. This model also has a very interesting feature: it can track other Rino users and show their location.
Needless to say that this feature, for us PPG pilots, is very useful, especially when we fly in a group. In case of an emergency landing of one of us, the Rino will track him down enabling a prompt rescue operation.
Like most of the new radios, the Rino has a single socket for both, the microphone and the headset.
After I purchased mine, I realized I needed to change the jack on my headset cable.
Mr. Gary Brown of West Chicago (Illinois) was kind enough to help me in transforming my headset cable which had double jacks (mic and headset) into a single jack system.
For this, we need to remove the existing double jack by cutting it away and installing a new "stereo" one. This jack can be purchased at any Radio Shack store and the part number is:
This jack is a 90 degree angle type will swivel while connected to the radio. It is called Stereo Right Angle 3-conductor Submini Phone Plug and the Radio Shack part number is: 274-298.
After removing the old jack, we split the cable cover and make sure we identify the four cables which are as follows: one microphone wire with a ground and one headset wire with a ground.
The two "grounds" can be soldered together and connected to the ground of the new jack.
Next, according to the pictures below, the microphone jack and the headset one,need to be soldered to the appropriate parts of the new jack.
The picture below illustrates how the connections were made on a NAAC 2000 radio helmet with self-contained side-tone.This helmet was purchased from Ohio Powered Paragliding
The helmet has a side tone and the radio needs to be set to:"boom microphone with VOX".
For helmets without side tone the radio needs to be set to: "boom microphone with PTT"
If this setting is incorrect no transmission or reception can be done!
To additionally secure the cable into the jack, I used heat shrink tubing which of course needs to be installed on the cable prior to making all the soldering.
The heat shrink tubing, dissipating the tensions, will also prevent a cable rupture by the jack.