Longtime Engineer's Corner readers know that we've had, well, "issues" with the STL or "Studio/Transmitter Link" for our 88.1FM signal in Providence. The STL is what carries the audio from our studios in downtown Providence to the transmitter/tower at the Wheeler Farm in Seekonk.
Now a couple weeks ago we revealed that half of a new wireless microwave STL was installed, and that the other half would be installed soon. Today, we fired it up for the first time and the results were gratifyingly positive!
Not nearly as romantic as "Lost in Austen", but the hefty thunderstorms that roared through Wednesday morning dumped a lot of rain and dropped a lot of lightning, both of which conspired to take RIPR's 102.7FM (and MVYradio's HD2) off the air for an hour or two.
UPDATE @ 1pm : 88.1FM is back at normal power! Pics are available on our Twitter feed here, here, here and here. By the way, many of these pics were taken with a stock iPhone 5S using this telephoto lens attachment. Pretty good for $45!
On Wednesday June 18th, beginning around 9:30 or 10am, 88.1FM will be running on the backup transmitter & antenna for a few hours to install new equipment on the top of the tower. We must run on the lower-power backup for the health & safety of our tower climber.
The backup operates using a one-bay vertically-polarized omnidirectional antenna and about one-tenth our normal power.
THIS WILL NOT IMPACT OUR 91.5 OR 102.7FM SIGNALS, NOR OUR WEBCAST.
The morning of April 30th saw several odd "dropouts" in the audio on 88.1FM, usually lasting 5 to 8 seconds each, happening as often as 2 or 3 times a minute, but more commonly once every 10 to 15 minutes.
There was also an odd "repeating audio" effect some people noticed, when the audio came back.
In light of ongoing issues with the Studio/Transmitter Link (STL) for WELH 88.1, we have implemented a new STL schema. If you heard a lot of odd audio dropouts on 88.1 today, that was the reason.
The good news is that we should have a pretty good temporary solution in place, and a solid path for a permanent solution is on the horizon (tentatively scheduled for mid-March). Best of all, I was able to put in a new(er) Orban Optimod 8100A audio processor to replace the less-capable Inovonics DAVID-III. There's a little sibilance still, so I need to tweak the settings. But overall the sound should be much louder, fuller, and more consistent.
UPDATE (Jan.10): Verizon sent a trio of techs today to examine the Digital Lines. They found a splice point on a pole near the Wheeler Farm end of the circuit where water had gotten past the weatherproofing. The splice was re-done, with fresh (and better) weatherproofing sealant applied, and a weather box placed around it.
That's likely the culprit here: the problems started during the snowstorm, so probably water got in there and expanded/contracted repeatedly as the water froze and melted. That expansion wreaks havoc with (relatively) fragile copper telco wiring.
As of 3pm we are back on our main STL. We've noticed the volume levels seemed to have changed somewhat with this repair, too, so we're still tweaking things.