Search found 97 matches

by Lee_Wheeler
Sun May 06, 2018 11:36 am
Forum: Ask the Engineers
Topic: STL Frequencies
Replies: 12
Views: 269

Re: STL Frequencies

In the continental United States, no. 47 CFR 74.432 (e) In Alaska, Guam, Hawaii, Puerto Rico, and the Virgin Islands, base stations may provide program circuits between the studio and transmitter or to relay programs between broadcasting stations. A base station may be operated unattended in accorda...
by Lee_Wheeler
Mon Mar 19, 2018 1:48 pm
Forum: AM Radio
Topic: GatesAir suspends AM TX sales (Radio World)
Replies: 33
Views: 1096

Re: GatesAir suspends AM TX sales (Radio World)

Just curious, beyond a few FM's going with lower gain antenna's and higher power TX's to clear tower space, and an even fewer that builds full power aux sites rather than lower power for RF exposure rules, how does the TV repack affect FM transmitter sales substantially? There are not that many. I ...
by Lee_Wheeler
Fri Mar 16, 2018 7:13 pm
Forum: Everything else
Topic: RadioWorld Magazine
Replies: 18
Views: 483

Re: RadioWorld Magazine

I got an email from them last week with a link to the most poorly constructed survey that I have ever seen. They wanted to rank how often you use various forms of media when researching equipment - on a 1 to 30 scale - with no guidance on which is more or less. If I use say Google a lot does it get ...
by Lee_Wheeler
Thu Mar 15, 2018 8:44 am
Forum: FM Radio
Topic: band pass filter recommendations
Replies: 12
Views: 296

Re: band pass filter recommendations

My RF Specialties guy has been selling my clients Shively cavities for the translators where the translator antenna is very close to another FM. They seem to work fine. They can be bought in single, double, or triple cavity versions and that decision is made based on the channel spacing between the ...
by Lee_Wheeler
Sun Mar 11, 2018 11:37 pm
Forum: AM Radio
Topic: ground strap thickness
Replies: 10
Views: 540

Re: ground strap thickness

Depending on the way the electricians and, more importantly, the inspectors read code then most broadcast operations can be out of compliance. Code wants one, and only one, bond between ground and neutral and that bond is to be located in the main service entrance panel. Adding ground straps off of ...
by Lee_Wheeler
Tue Feb 27, 2018 9:32 pm
Forum: FM Radio
Topic: Pira 132 best practice
Replies: 5
Views: 333

Re: Pira 132 best practice

They are all pretty much the same. Just loop it though and set the modulation and injection levels. On a loop through it should automatically phase lock. Obviously morning drive is a bad time to do it. I'm guessing that you aren't going to send out song and artist data and just scroll the station id...
by Lee_Wheeler
Mon Feb 12, 2018 1:02 pm
Forum: FM Radio
Topic: Translator Question...
Replies: 11
Views: 496

Re: Translator Question...

An alternative plan would be to find a low power transmitter (I assume the transmitter got flooded) & feed it into a long wire under an STA. Since the station is then on the air, the translator could continue to operate. Maybe, The conductivity in Tennessee is so awful that it may take a bunch of t...
by Lee_Wheeler
Sun Feb 11, 2018 10:04 pm
Forum: FM Radio
Topic: Translator Question...
Replies: 11
Views: 496

Re: Translator Question...

If this is a recent grant I would say no. All of the CP's that have been granted out of the latest round of windows have carried a restriction that, nighttime operation for a daytimer notwithstanding, they may not operate absent the AM signal. If the AM signal is diminished the FM signal must be red...
by Lee_Wheeler
Sat Feb 10, 2018 7:30 pm
Forum: Radio Studio Engineering
Topic: Digital console, remote operation
Replies: 1
Views: 154

Re: Digital console, remote operation

Most of the present crop of IP consoles have means to run the console from a GUI. With Wheatstone you can use the Screen Builder software to layout a full control console on a laptop and run it via VPN from a remote location. The software is fairly graphical but I don't think it takes a ton of bandw...
by Lee_Wheeler
Fri Jan 26, 2018 9:35 am
Forum: AM Radio
Topic: Delta DAM-1
Replies: 3
Views: 389

Re: Delta DAM-1

He was over to the station yesterday and no joy. I guess it went with the monitor to wherever it went.

...Lee
by Lee_Wheeler
Sun Jan 21, 2018 6:38 pm
Forum: AM Radio
Topic: Delta DAM-1
Replies: 3
Views: 389

Re: Delta DAM-1

I had one of those at a station I contracted for years ago. It got replaced by a Gorman Redneck somewhere along the line but they may still have the manual for it. Let me check with the current contract engineer to see.

...Lee
by Lee_Wheeler
Fri Jan 12, 2018 2:05 pm
Forum: FM Radio
Topic: Harris FM K5 Freq Change
Replies: 18
Views: 877

Re: Harris FM K5 Freq Change

Q what is - the driver matched to the grid on the PA. On the 10 and 20 there is some( * "bend tuning" involved. EXPLAIN *) There is an inductor that is physically in the form of a thin strap that is shaped somewhat like a "Z" on the bottom of the PA tube socket on the 20s. It is likely about the sa...
by Lee_Wheeler
Wed Jan 10, 2018 9:33 pm
Forum: FM Radio
Topic: Harris FM K5 Freq Change
Replies: 18
Views: 877

Re: Harris FM K5 Freq Change

I can't recall if I've ever done a freq change on a 5K but I have done some 10Ks and 20Ks and their H3 variants. For sure on the 20K and I think the 10K the low pass filter had three different part numbers based on which segment of the band the operating frequency was. It was just dumb luck but on a...
by Lee_Wheeler
Mon Jan 01, 2018 9:56 pm
Forum: FM Radio
Topic: Wanted reliable monitor amp
Replies: 11
Views: 644

Re: Wanted reliable monitor amp

Interesting...have a D-75 I'll take a second look at. As I remember, it didn't quit but got noisy. One I can't recommend is the Alesis RA-150. Have two sitting in the equipment mortuary--both lost one channel of the amp. The pots are terrible and they tend to get real noisy or have a channel just d...
by Lee_Wheeler
Mon Dec 11, 2017 3:11 pm
Forum: FM Radio
Topic: BE FM 25T Wandering Readings
Replies: 4
Views: 402

Re: BE FM 25T Wandering Readings

I had a bunch of trouble with the Arc Plus readings on the Continental 816s looking like a modulation monitor but in the last firmware and software revs there is an option to increase the sample time which settled the readings down tremendously. I think I gave them a 2 second averaging time on the t...