Something is not right

The Goddamnitnotagain edition:

PA module with burned open output transformer

I went to do maintenance at one of our sites and noticed that a certain transmitter was running at half power. Followed the path of the fault log and found this. When I mentioned it to the station staff, they said, “Yeah, we noticed it sounded a little funny…”

This is the second time this has happened with this particular transmitter. In any case, this is what I get paid for, so I am certainly not complaining. If only every problem where this easy to find.

When I get back out there to replace this, I will bring out my network analyzer and sweep the antenna and transmission line to make sure there are not issues with that. In addition, I will double check all the grounding to make sure the copper thieves have not made off with any critical components like the ground buss bar or #2 solid down lead wires.

A few pictures

Some things I have been working on lately:

A nice row of transmitters
A nice row of transmitters

Finishing up a transmitter site rehab.  The BE FM20T is nearly 20 years old.  The BE FM2C transmitters are new.  There is also a rack of new fiber equipment and CODECs.  This site has good utilization; there are three stations on one tower with a shared STL antenna and generator.

Energy Onix ECO-6
Energy Onix ECO-6

Energy Onix ECO-6 tube type transmitter.  One of Bernie’s better designs, a grounded grid tube with solid state driver section.  This one needed some fans replaced and a new tube.

AM transmitter site.  Looks like these vines have not been cut in a couple of years.
AM transmitter site. Looks like these vines have not been cut in a couple of years.

I wonder how much the guy tensions have changed…

Noticed this after some particularly strong thunderstorms
Noticed this after some particularly strong thunderstorms

The reason why you do not use a POTS line phone during a thunderstorm.

USS Slater radio room
USS Slater radio room

I took a tour of the USS Slater, a museum ship in Albany, NY.  The museum has painstakingly restored the ship to its WWII configuration.  The main transmitter is the RCA TBL-8 seen in the left/center of this picture.  This unit put out 200 to 400 watts CW or 150 watts AM phone.  During the hostilities it was turned off as allied ships observed radio silence unless they were sinking (and sometimes even then).

A little ChiFi tube type RIAA phone preamp.
A little ChiFi tube type RIAA phone preamp.

I have been fooling around with this little 6AK5 preamp.  I find it works very well and sounds better than the built in phone preamp on my Kenwood VR-309.  The FU-29 tube amp did not come with a phone preamp.

This is a short video clip of an audio processor at one of our transmitter sites. The fancy lights around the control knob are designed for the program director. They are saying “Buy me… Buy me…”

Another FAX 5 install

At the risk of becoming redundant, here are a few pictures of a GatesAir FAX-5 install recently completed in Westerly, RI.  This was installed in a recently vacated Verizon cell site next to the old transmitter building.  The old transmitter building and the equipment contained therein had seen better days, to be sure.

UPDATE:

As requested, the only pre-installation photo I can find:

Some Verizon equipment still in place
Some Verizon equipment still in place

That photo was taken back in October 2018, when we first looked at the Verizon shelter as a viable alternative to the current transmitter site.

FAX-5 transmitter with fancy logo, placed in position

Transmitter in place, AC mains and RF connections made

Ground strap installation

Test mode, clamp on AC current meter, measuring amps per leg at full power

FAX-5 transmitter and equipment rack, on the air

Transmission line, supported by unistrut

Delta coax switch and Electro impulse dummy load, salvaged from old installation

FAX-5 running into antenna for the first time

Overall, the transmitter sounds great.  Much better than the old unit which had an AM noise problem.

If it wasn’t so far away, this would have been a pretty easy project.  There were minor miscues along the way that added up.  I will say that I learned a few good life lessons about the reliability and responsibility of people.

Hoth

Alternate title: Winter in the Northeast

For all you southerners and west coast people, we have been having an average winter here in the Northeast. While many of our transmitter sites are drive ups, we have several located at ski area mountain peaks.  Technically, those mountain top transmitter sites are a fantastic way to get the Height Above Average Terrain (HAAT) way up there.  Logistically, they are much more difficult to deal with.  Installing a new transmitter or even refueling a generator takes major effort.  Working in the cold and wind is much more fatiguing and requires paying special attention protective clothing, hydration, exposure, etc.

Here are a few pictures from Killington and Pico mountain ski areas in Vermont

Your ride is here.
Your ride is here.

The snow grooming machine is the only way to bring anything up to the top of the mountain during the winter time. In this case, I needed to replace a BW Broadcast TX 1500 watt transmitter.

Trail from ski lift to tower
Trail from ski lift to tower

Even with the snow grooming machine, the last few hundred yards needs to be walked. Fortunately, the snow is packed and not too deep here.

Tower on Pico Mountain
Tower on Pico Mountain

Tower is encrusted with ice. I can tell the tower climber is having a great day:

Tower climber working on ice encrusted towe
Tower climber working on ice encrusted tower

Riding the chair lift back down the mountain gets plenty of strange looks from those skiers coming up:

Pico chair lift
Pico chair lift

Over on Killington Peak, conditions are actually worse.

Killington Peak tower
Killington Peak tower

The ERI antenna heaters cannot keep up with the ice buildup.

ERI two bay antenna with ice.
ERI two bay antenna with ice.

The general manager insists that this winter is not too bad and everything should be working right. My statement to her: Based on my 27 years experience, your shit is fucked up. But if you know how to fix this, come on up and show me.  She deferred.

FM transmitter building and antenna
FM transmitter building and antenna

What the fire tower looked like last winter.

Killington peak fire tower
Killington peak fire tower

Train from the Gondola to the tower
Train from the Gondola to the tower