This contactor was used to replace the Furnas contactor installed as original equipment when the transmitter was manufactured in 1986. Furnas is no longer in business, thus the ABB A145-30 was substituted. It was purchased directly from Broadcast Electronics for an FM35A transmitter:
ABB A145-30 contactor
It was installed about 18 months ago and has been in nearly continuous use since. The broken white plastic housing surrounds the contactor coil and is responsible for pushing and holding down the contact fingers.
ABB A145-30 contactor coil cover
Looks like the coil is running too hot and damaging the plastic. This resulted in a failure of the contactor to make and no high voltage to the transmitter PA. Obviously a problem. I spoke to BE about this and they did not have a good answer. Actually, what they said was “That contactor is rated for 220 amps,” which is true enough. The only thing that I can think of is the coil is rated for 208 volts and the transmitter is connected to a 240-volt delta service.
A new contactor was ordered and installed yesterday.
I will investigate the coil voltages further, but for now, the 27-year-old transmitter remains on the air.
Update and bump: The many great comments about the SBE certifications got me thinking about what a Broadcast Engineer actually does. I remember typing something about it quite some time ago, thus, I dredged up this old post originally from August 8, 2009 out of the archive.
Enjoy:
The other day, the NTR (Non-Traditional Revenue) person came to me and said “Great news! We hired a new web guy, he knows all about engineering too!”
Really?
So I spoke to the new Web Master/Broadcast Engineer for a bit. As it turns out, he knows how to do things like reboot the XDS satellite receiver, and reboot an Audiovault server, he has been to a transmitter site a few times to take meter readings. I suppose these days, that is what counts as being a broadcast engineer. Someone with this level of experience could get by for a bit until something really bad happened.
Sadly, I think (my former employer) upper management and ownership believe that this guy could do my (old) job. To them, I am an employee number, with a salary and benefits package worth X. If they can replace me with someone that makes <X, that would represent savings. Plug that guy into this spot, everything will go on as it did before.
I don’t think they understand exactly what a Broadcast Engineer does. On any given day, I may:
Program an automated computer
Change the battery on a backup generator
Change the battery bank in an 18 KVA UPS
Clean a transmitter
Aim a satellite dish
Troubleshoot a DS-1 Circuit
Troubleshoot a T-1 MUX
Repair a microwave transmitter or receiver
Take a set of monitor points
Repair a tower light flasher circuit
Install a console (analog, digital, IP routing, TDM routing)
Repair a CD player
Troubleshoot a transmitter RF module
PM a generator
Work with a tower crew to place an antenna on a tower
Install an RF connector on 3-inch transmission line
Wire an air conditioning unit at a transmitter site
Repair lightning-damaged ATU
Troubleshoot an AC unit
Aim an STL antenna
Repair an RPU transmitter
Design a computer network
Troubleshoot and repair an FM transmitter
Wire a new rack room
Coordinate a complex format change
Install a translator
Program and wire a new satellite receiver
Wire a transmitter remote control
Hike to a transmitter site after a natural disaster
Troubleshoot an audio hum
Pass an FCC inspection
Install and program an EAS unit
Wire a new studio
Design a tower light monitor circuit
Fix a studio phone system
Install an audio router
Match an AM transmitter to a new tower
Wire an ethernet patch panel
Program a wireless access point
Install an IP router
Manage a new tower project
Install a new transmitter
Re-install an old transmitter
Make NRSC measurements on an AM transmitter
Repair a corrupt OS
Replace a hard drive
Reboot a server
Fix a reel-to-reel machine
Install a computer program
Clean a console
Pass an inspection by the fire marshal
To name a few. In other words, there are a lot of complex systems at a multi-station radio facility. Some of this can be learned at various schools and colleges. A lot of it is experience. There is no substitute for an experienced veteran broadcaster who has seen almost everything and can think on his or her feet.
I have had this discussion with the market manager, and he gets it. I know that he understands and knows more about the ins and outs of all of our studio and transmitter sites. Things like, where is the water shutoff, the handle is broken off of the toilet on the second floor. Of course, I know it is downstairs in the furnace room next to the fire sprinkler system.
I know where the skeletons are buried. I have the inside numbers for the utility companies and the phone company. I know the code enforcement officer for most of the municipalities where we own buildings and property.
I am toying around with the idea of reinstating my SBE certifications. At one time, I was certified as a Senior Radio Engineer. That certification lapsed several years ago for a variety of reasons. First and foremost was my desire to find another career outside of radio. At the time, I was working for a giant flaming asshole who prided himself in causing his subordinates health problems; things like strokes and heart attacks. The sign over his desk read “The floggings will continue until morale improves.” I was also busy at home with a new, very young child and an old, broken-down house. There was not enough time to come up with enough professional points to re-certify or study for a test. So, it went by the wayside.
Lately, however, I am beginning to see some advantages of having an SBE certification:
It comes in handy as a skills benchmark for potential clients and others
It lends some amount of credibility among fellow broadcast engineers
There is a support network for job searches
Thus, when I went to the SBE website and found the Jubilee Project, I was intrigued. The SBE is offering to reinstate those former members with lapsed certifications until April 2014 provided the applicant can supply enough recertification points. I am also contemplating taking the Certified Broadcast Networking Engineer test for much the same reasons listed above. I will let you know how it goes.
Incidentally, my ability to deal with giant flaming assholes as increased in the intervening years. What doesn’t kill you makes you stronger.
This came up in one of my earlier computer classes. When installing new systems, often we are required to download applications such as web browsers, media tools, runtimes, etc individually. Ninite.com allows an IT person to create a custom installer with all of the freeware applications desired. Once created and downloaded, this installer can be used on multiple machines across a network.
If one were using Windows Server with active directory, this installer could be either published or installed with the computer node at first boot up.
