Jeff Welton, has worked with Nautel for 25+ years. He is currently the Nautel Sales Manager for U.S. Central Region but previously he spent 16.5 years as a Nautel Customer Service Technician.
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Happy end of summer to all; lightning season is starting to wind down over a good portion of the planet and we haven’t quite gotten to snow and ice season yet. It’s a good time to start looking at all the little maintenance and “to do” projects that we’ve been stockpiling over the busy months. On that note, I’ve collected some input from a couple of customers who I’ve heard were doing some pretty interesting things over the past few months and added a few tidbits of my own…
Surface Mount Solution for A3 Board
First, this bit of budget engineering came from Sam Lewis in Chattanooga, TN, by way of our Customer Service department (thanks, Sam and Nelson!).
“I believe I’ve found a non-expensive (temporary) solution for the problems with the A3 board. [Jeff’s note: A3 is a board in the M50 exciter, populated mostly with surface mount components].
I noticed that the two main processing chips on board A3, were BGA mounted chips. Typically, around 2006 or so, manufacturers liked to utilize non-lead-based solder for Ball Grid Array soldering. Typically they use microwave radiation to solder BGA chips, but there is a technique used by some hobbyists to re-melt the solder under the BGA chips. You may be familiar with the technique, it is typically called “re-flowing”. I tried the process and it worked for me. Now my M50 is up and working again!
The technique is to use a heat-gun to heat the chip and solder to a temperature that will re-melt the BGA connections. You hold a heat gun approximately 2″-3″ away from the chip and move the heat-gun in a circular motion about the chip for approximately 45 seconds and it sometimes will re-melt the solder joint without damaging the chip.
I did this for both U9 and U11 and the exciter is operating normally again. Hope this may help others in this situation.”
If you’ve got a board with surface mount components that’s starting to display an intermittent symptom, this might be a way to get a temporary solution – on the other hand, it might make the intermittent symptom a permanent one, so approach with caution! The side benefit is that a permanent symptom is easier to troubleshoot than an intermittent one!
AUI and Using your Mobile as a Pager
Next, we move over to the AUI and getting the most out of it. Sean Mattingly, with Woof Boom Radio in Muncie, IN, provides some detail on an app he uses to allow the email functionality of his GV20 AUI, to replace dial up remote control messaging – even when his phone is in silent mode.
“I just installed a new GV20 transmitter. It works great. Normally I am accustomed to wiring transmitters to a conventional dial up remote control. If a meter reading is exceeded, the remote control seizes an analog phone line and calls my pager and cellphone alternately. At night, I turn off the cellphone ringer so random callers don’t wake me up. The pager stays on 24-hours so transmitters can call me.
The Nautel has an IP connection, but I didn’t want to wire it to a conventional remote control for alarms. I searched for an Android app that can accept a text message or email, and trigger my phone to ring in a special way, even if the phone ringer is off.
After testing 3 or 4 different “pager” apps on my smartphone, I found that they lacked in various ways. Finally I found in the Google Play Store an excellent free app called “FireAlert2”. Two photos are shown (right). The first shows the app icon so you know what the installed app “FireAlert2” looks like.
The second photo shows one of the set up screens. Here, you set up a trigger that will make the phone notify you. In this case, I gave the trigger a name, checked the box to enable it, then checked the box to make it save a history of events. Under “Trigger (Sender)”, put the email address that your Nautel transmitter sends “from”. Under “Trigger include”, tell it what words appear in the subject that make it trigger an audio alarm on the phone. I picked “at WLBC Nautel” because that phrase is always in the alarm emails that come from the transmitter. You would use the word “at” then [your transmitter name] then “Nautel”.
Upon receiving an alarm email or text, the app sounds the alarm loud and clear. It has a screen that requires the user to acknowledge the audio and visual flashing alarm by sliding a bar across the screen. It works great.
As a bonus, this app can also be programmed to make an alarm noise on a schedule. And it can make an alarm if a phone call comes in from a certain phone number, such as the one you use for your conventional dial up remote controls.
It is nearly a pager substitute.”
AUI and Flash (Yes, I know…)
At least once a week, I get asked when we’re going to move the AUI away from Flash. The answer is, “it’s on the list.” However, in the meantime, there are apps available to let you access a flash based device from a non-flash supporting device (such as, since the last OS upgrade, my Blackberry). Here are a few of the ones we’ve used and my notes on each, in no particular order.
That wraps it up for this issue – until next time, be safe and happy engineering!