Installing A Cel-Fi Go Mobile Phone Signal Booster

A brand new Cel-Fi GO mobile booster pack was sitting there, waiting for me to install into our truck based camper. Powertec Telecommunications recommended I use an authorised installer, however I was keen to do it myself. You see, I wanted to learn as much about this package as I could.

So how easy is a Cel-Fi GO to install?

What Do You Get For Your Money?

We bought the Cel-Fi GO Repeater For Telstra – Trucker/4WD EDGE Pack. Why this one? It’s suitable for vehicle installations and the external antenna has the most gain. This simply means the antenna is the best one available for picking up weak mobile signals in flat country.

You get an external antenna, an internal antenna, a Cel-Fi GO repeater unit and 12V power cord.

In hindsight, we should have bought the Cel-Fi GO Repeater For Telstra – Trucker/4WD Mini Pack. With a cabover truck (flat nose), the metal on the front of the cab interferes with the incoming signal.

And because the external antenna is so tall, it looks straight through the windscreen. This means isolating the external and internal antennas is difficult, as they need to be isolated by metal.

For more details on antenna isolation, go to the section in this article, titled “Isolation And Clear Space”.

The Mini Pack includes a much shorter external antenna. This can be mounted on a mirror bracket or even at the top of our tray’s headboard. There, it will have clear air round it and also be isolated from the internal antenna.

External Cel-Fi antenna could be mounted on mirror or at top of tray.
External antenna could be mounted on the mirror bracket or at the top of the tray’s headboard. This would eliminate interference from the truck cab.

The downside? The Mini antenna doesn’t have as much range as the taller EDGE antenna. In our case however, I expect this will be more than compensated for by the smaller antenna having no interference from the cab.



Finding A Location For The Repeater Unit

When choosing a position for the Repeater Unit, you need to consider 3 things. Where is the 12V power supply coming from, is the external antenna cable long enough to reach the unit and is the internal antenna cable long enough to reach the unit?

Actually, 4 things. Make sure the Repeater Unit is protected from accidental damage.

The Cel-Fi GO tucks neatly up under the drawers.
The Cel-Fi GO Repeater Unit tucks neatly up out of the way. Ignore the messy cables, they need to be tidied up!

We had the perfect spot for ours, a drawer system inside the truck. On one side of this, we have a power supply coming directly from a 12V second battery system. This power supply terminates at two terminal blocks, a positive and a negative. Further, the positive terminal block doubles as a fuse block.

Above this is a 350W inverter. Above the inverter was a clear space, ideally sized for installed the Cel-Fi Go Repeater Unit. So it was a simple matter of drilling some holes and bolting it on.



Supplying Power To The Repeater Unit

The Cel-Go package comes with a power cable. It has a lighter plug, so you can plug it into a standard lighter socket.

However it wasn’t quite that easy for us. Firstly, the truck runs on 24V, so the lighter socket is a 24V unit. Secondly, these connections are notoriously unreliable. They wobble and fall out, especially in a truck.

The On/Off switch for our Cel-Gi GO.
On/Off switch for the repeater Unit was mounted into an existing light switch terminal box.

So we decided to hard-wire the unit. We already had our 12V power supply close by. We had also fitted LED lighting in the back seat of the truck, so we also had a small terminal box with a switch.

It was simply a matter of installing a second switch for the Cel-Fi GO Repeater Unit and running some cables. We cut the lighter plug off the supplied power cable and hard-wired it.

We used 7.5A twin cable, more than enough for the unit. A 5A blade fuse completed the job. So now we had a reliable 12V power supply and a means of turning the Repeater Unit on and off. Perfect!

Negative terminal of power supply for Cel-Fi GO.
The negative terminal of the power supply from our second battery system. The Cel-Fi cable is the white one at bottom left.
Positive terminal with fuse to supply power to Cel-Fi GO.
Positive terminal from our second battery system, with facility for blade fuses. The Cel-Fi cable is at far left.

Installing The External Antenna

The external antenna’s cable is pretty thick. So it takes a bit of thought to get a neat cable run. With the antenna bolted to the bullbar, we found a way to get the cable through the firewall.

For all you Isuzu N Series owners, I’ll give you a tip. Take out the left headlight and you’ll find a grommet hidden in there, with factory cables already running through the firewall. That’s the spot!

Now this is where it gets tricky. The cable is quite short, for a truck at least. Ours just reaches the Repeater Unit without being tight. Be careful, check this before you decide on a location for the Repeater Unit and the antenna.



Where To Mount The Internal Antenna?

This antenna should be easy to install. With some double-sided tape on the back, you should be able to select a spot and stick it on.

However, we had the isolation issue I mentioned earlier. So I decided to temporarily mount the internal antenna with a couple of cable ties. This was a good decision, as I’ve already moved it around a couple of times.

Once we change our external antenna, I’ll mount the internal one permanently.

Internal Cel-Fi antenna temporarily mounted.
Internal antenna temporarily cable tied to bar behind passenger seat. The black cable running diagonally up behind the seat is the external antenna cable. It just reaches, not ideal.

Summing Up

So that’s it. The installation is complete. Sounds easy doesn’t it? Except it’s not.

Have a read through this article before you attempt your own installation. I can’t over-emphasise the importance of isolation between the two antennas. It is absolutely critical to achieving maximum boost from the Cel-Fi GO.

This is where authorised installers come into the picture. They should (hopefully) be far more experienced in the subtle art of antenna isolation than you and me.

Despite our less-than-perfect antenna isolation, we now have a Cel-Fi that significantly extends our mobile phone coverage. We’ve been to several places where previously we had effectively no signal. Now we can send and receive mobile calls, check emails and so on.

There’s no doubt the unit does the job. We’re really happy with it and for us, it’s money well spent. After all, our livelihood depends on being able to connect online.

You can also buy Cel-Fi Go products here.

Questions or comments? Ask away in the Comments section below.

Any errors or omissions are mine alone.

Note: This article contains an affiliate link to Amazon Australia.

 


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