theec

Engineer's Corner
10:17 am
Thu May 22, 2014

TheEC: Air Conditioning at 88.1FM

New portable A/C. Note the pink foam insulation along the walls.
Credit Aaron Read RIPR

Regular readers of the ENGINEER'S CORNER might recall my story about air conditioning at our 102.7FM transmitter in Narragansett Pier.   Well now I'm pleased to report that we have air conditioning at 88.1FM WELH in Seekonk as well!

In many ways, this is an even bigger deal; 102.7 had a hefty vent fan system that could move a lot of air.  Sure, if the air outside was hot, it means the air inside was hot, too.  Usually you can't cool a room using outside air below about +10F degrees above outside air temps.   So if it's 90F outside, it's 100 to 105F inside...ugh!  

And at 88.1, we didn't really have even that.  The transmitter site is an 8x10ft shed with a single 12 inch desk fan blowing air out one of the wall vents, and no insulation whatsoever on the walls or ceiling.  Temps routinely broke 120F inside, even when it was only 70 to 80F outside.

Read more
Engineer's Corner
2:24 pm
Fri May 2, 2014

TheEC: NAB2014 in Vegas

Your intrepid engineer presents at PREC.
Andrea Toven

As promised, here are some pics of my six days and seven nights in Las Vegas for the 2014 National Association of Broadcasters (NAB) show, one of the biggest conferences in the USA, with over 98,000 engineers, managers, vendors and content creators all crammed into the truly massive Las Vegas Convention Center (LVCC).

Read more
Engineer's Corner
12:42 pm
Wed April 30, 2014

TheEC: Audio Dropouts on 88.1FM

Can you hear me now?

UPDATED 5/8/2014.

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.

Read on for the explanation of both!

Read more
Engineer's Corner
1:11 pm
Thu April 10, 2014

TheEC: Heartbleed and Donations to RIPR

The big news in computing this week is Heartbleed, a serious security problem with secure websites.   Specifically, it's a two-year-old bug in the near-ubitiquous OpenSSL (Secure Socket Layer) protocol...most commonly recognized when there's a "https" (instead of "http") at the beginning of a website address.

It's a big problem, and I'll explain why in a second, but first I wanted to let everyone know that the RIPR donations website is secure and never was vulnerable to Heartbleed.   They use a hardware-based implementation of SSL, not OpenSSL.

So if you have donated or plan to donate to RIPR, you have nothing to worry about in regards to Heartbleed and that donation.  Whew!

Read more
Engineer's Corner
12:46 pm
Tue March 18, 2014

TheEC: $18 Million Dollar Typos

The RIPR AudioVault

  This time on The Engineer's Corner, I want to look back three weeks ago, and look back over fifty years ago.  And how little typos can have a big impact when it comes to engineering.

Read more
Engineer's Corner
5:00 pm
Sun February 23, 2014

TheEC: FullChannel Proves Imitation is the Highest Form of Flattery

FullChannel Engineer: Jamie Griffin
Credit FullChannel

Our good friends at FullChannel cable, available to residents of Barrington, Warren and Bristol, are not only nice enough to put RIPR's audio on channel 799.   But also their engineer, Jamie Griffin, has started his own "Engineer's Corner" email newsletter for cable TV folks.

Read more
Engineer's Corner
5:08 pm
Mon February 3, 2014

TheEC: Prison Radio

Sony SRF-39FP
Credit Museum of Everyday Objects

A recent article in the New Yorker about radio in prison piqued my interest.  Besides providing a window into a world that many of us know little or nothing about, it caught my eye that these Sony SRF-39FP ("FP" for "Federal Prison") radios are actually remarkably good receivers.  

Read more
Engineer's Corner
10:08 pm
Mon January 27, 2014

TheEC: 88.1 Studio/Transmitter Link

Screenshot of the Comrex BRIC Link web GUI
Credit Aaron Read

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.

Read on for more details...

Read more
Engineer's Corner
11:49 am
Tue January 21, 2014

TheEC: Browser Extensions that Spy on You

Credit howtogeek.com

Taking a break from broadcast engineering this time on TheEC, and instead we'll look at the other side of my job: computers.   In particular, here's a heads-up to a recent story that's lit-up the geekier realms of the internet, but may not have percolated to your inbox just yet.  It has to do with BROWSER EXTENSIONS and how they might or might not...probably might...be spying on you.

Read more
Engineer's Corner
4:58 pm
Fri January 3, 2014

TheEC: Digital "Chirps" on 88.1

PCAU cards. Left is WELH's Main STL encoder. Right is an unused spare.
Credit Aaron Read / RIPR

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.

----------------------------

ORIGINAL POST (Jan.3): Ever since the hefty snowstorm and extreme cold on Thursday night, our 88.1 signal in Providence has been experiencing "digital chirps" now and then.  

Read more

Pages