Search found 69 matches

by Lee_Wheeler
Tue May 16, 2017 1:16 pm
Forum: Everything else
Topic: L-810 LED Side Markers
Replies: 1
Views: 76

Re: L-810 LED Side Markers

One of the American Tower Corporation towers that I have a couple of FMs on has been replacing the incandescent fixtures with the LED equivalents as the sockets or the lenses break. They don't last forever and I think they had to replace one of them when they came in and re-lamped the tower a couple...
by Lee_Wheeler
Tue May 16, 2017 1:04 pm
Forum: AM Radio
Topic: Daytime Impedance high?
Replies: 4
Views: 211

Re: Daytime Impedance high?

Sounds like you need to get an actual OIB or some other bridge on the ATU output and see what the impedance really is. With a 433 Ohm tower you aren't going to get anything accurate with a common point bridge since it is designed to monitor something at or near 50 Ohms. If the ND tower impedance is ...
by Lee_Wheeler
Tue Apr 25, 2017 6:45 am
Forum: FM Radio
Topic: Vertical or Circular polarization FM Broadcast
Replies: 7
Views: 217

Re: Vertical or Circular polarization FM Broadcast

It will work either way but the rabbit ears analogy falls apart a bit in that the listener, the end user, rarely has any control over the orientation of the antenna at any given time. The nice thing about C-pol is that it is effectively in all planes all the time, not just H and not just V. It gives...
by Lee_Wheeler
Mon Apr 24, 2017 2:50 pm
Forum: FM Radio
Topic: New Sound Board
Replies: 8
Views: 298

Re: New Sound Board

It all comes down to features and quality. You can get decent audio through a $200.00 Mackie but things like remote starts and on-air lighting circuits take a more broadcast oriented console to make those connections easy and reliable. For multiple studios the AOIP (Audio Over IP) digital consoles m...
by Lee_Wheeler
Fri Apr 21, 2017 7:54 pm
Forum: FCC Discussion
Topic: More TV mergers coming soon.
Replies: 3
Views: 173

Re: More TV mergers coming soon.

Technically it makes no sense whatsoever but be careful what you wish for. The queue is already forming at the bankruptcy court for some of the major radio groups.

...Lee
by Lee_Wheeler
Wed Apr 05, 2017 4:48 pm
Forum: Internet Streaming
Topic: Streaming monitoring?
Replies: 2
Views: 176

Re: Streaming monitoring?

I use the Linux Pulse Audio Volume Control package to direct stream audio to the system as a recording input. I think you can set up the PyAudio to threshold detect and then take it from there. There are some threshold detection settings on PyAudio that are discussed in this Raspberry Pi thread: htt...
by Lee_Wheeler
Fri Mar 31, 2017 10:36 pm
Forum: FM Radio
Topic: SWR/Return loss question???
Replies: 7
Views: 354

Re: SWR/Return loss question???

Trimming coax to deal with a bad match really doesn't change the load whatsoever, what it can do is alter the relationship to the directional coupler with the standing wave reflection. What it essentially does is trick the measurement rather than changing the load. If you do add a fine matching sect...
by Lee_Wheeler
Thu Mar 16, 2017 8:23 am
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 100
Views: 4264

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

What that is is a really bad execution of a bad idea. The tower behind it is a 1000' Stainless G-10 and it was doomed from the start. I think some fly-by-night data service put that in and then leased a subcarrier. I think they were out of business before the first ice storm so I guess from that per...
by Lee_Wheeler
Wed Mar 15, 2017 4:51 pm
Forum: Ask the Engineers
Topic: EAS over Barix
Replies: 8
Views: 274

Re: EAS over Barix

As with anything digital, the higher the bitrate the better it can be reassembled at the other end. I have only run into one instance where the header tones were degraded enough to make a difference. This particular station is a LP1 and the Wheatstone audio processor rendered the tone unreliable on ...
by Lee_Wheeler
Wed Mar 15, 2017 3:43 pm
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 100
Views: 4264

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

My Eb/No looks really bad.
20170315_095744.jpg
...Lee
by Lee_Wheeler
Wed Mar 08, 2017 4:44 pm
Forum: General Computers
Topic: Unplayable audio files
Replies: 9
Views: 416

Re: Unplayable audio files

I have a whole server full of them but that was after the crypto-lock malware attack that the stations got hit with a few years ago.

...Lee
by Lee_Wheeler
Tue Mar 07, 2017 1:00 pm
Forum: FM Radio
Topic: High Pitched Tone in FM Audio?
Replies: 23
Views: 1121

Re: High Pitched Tone in FM Audio?

Fascinating that they developed an audible whine with the problem in the RF stage. Those IPA to PA cables have cooked on my FM25k rigs (I have 2 pair, 4 transmitters) but I never noticed an audio problem. The problem manifested itself as purely an RF problem where a transmitter would dump for no app...
by Lee_Wheeler
Sun Mar 05, 2017 8:43 am
Forum: FCC Discussion
Topic: FCC AM Database
Replies: 8
Views: 476

Re: FCC AM Database

I am still using my old EDX DOS based versions of AMGW and AMW but, after the CDBS conversion, it got tricky. The FCC continues to publish and update the old VAX flat files but they wouldn't run on the database conversion program. The files looked the same but they wouldn't convert. I did a hex dump...
by Lee_Wheeler
Mon Feb 27, 2017 6:43 pm
Forum: STL Engineering
Topic: Starlink LAN
Replies: 18
Views: 822

Re: Starlink LAN

I am fascinated by this as well. How did you go about getting the Ubiquiti radios to work without cross polarization? I thought the way Ubiquiti did duplex was to send and receive on the same frequency but on the other polarity (ie: TX-Horizontal, RX-Vertical). I would love to buy some cheap Ubiquit...
by Lee_Wheeler
Sun Feb 26, 2017 1:26 pm
Forum: Radio Automation Systems
Topic: Audiovault question
Replies: 1
Views: 110

Re: Audiovault question

I installed some new monitors on a BE Audio Vault Express (I think - it was some sort of lightweight Audio Vault) several years ago and, after I got the proper monitor drivers to load on Windoze, it all kind if took care of itself. With the Generic PNP Monitor drivers it was all messed up.

...Lee