Search found 681 matches

by TPT
Wed Jan 17, 2018 6:10 pm
Forum: Ask the Engineers
Topic: Why does the same radio station go from clear to staticky on two different frequencies in a 2 square mile area
Replies: 4
Views: 137

Re: Why does the same radio station go from clear to staticky on two different frequencies in a 2 square mile area

Radio-Locator.com will give you a rough indication of both the strength of various stations, given a location, as well as maps showing areas covered by each station. Enter a town, and they show you what you can expect to find on your FM dial. The maps are kind of "generalized,"--if there is a mounta...
by TPT
Wed Jan 17, 2018 7:22 am
Forum: Ask the Engineers
Topic: Why does the same radio station go from clear to staticky on two different frequencies in a 2 square mile area
Replies: 4
Views: 137

Re: Why does the same radio station go from clear to staticky on two different frequencies in a 2 square mile area

Not unusual for non-commercial stations (that's where they reside in the U.S.--between 88.1 and 91.9) to have both limited coverage areas, even using directional antennas, as well as low power translators to rebroadcast that main signal. So, for example, your 88.3 signal may be a translator of the 8...
by TPT
Tue Jan 16, 2018 4:42 pm
Forum: FCC Discussion
Topic: Revitalized AM Translators
Replies: 16
Views: 322

Re: Revitalized AM Translators

If the CP was issued under the 250 mile move-in window from 2016, that translator is tied to the AM for a 4 year period. If the CP was granted before this window, there is nothing to prevent another station from buying the CP and changing the primary station. Same would be true if a translator was g...
by TPT
Mon Jan 15, 2018 5:38 pm
Forum: FCC Discussion
Topic: Revitalized AM Translators
Replies: 16
Views: 322

Re: Revitalized AM Translators

In answer to W9WI's post--the C.P. I was looking at with this condition was issued last Friday.
by TPT
Mon Jan 15, 2018 7:29 am
Forum: FCC Discussion
Topic: Revitalized AM Translators
Replies: 16
Views: 322

Re: Revitalized AM Translators

Ah, hill country thinking.... I am used to our poor conductivity. Though the wording is confusing and subject to two different interpretations. Section 1201(g) would allow an FM translator for an AM to be built 50 miles away from the AM transmitter site...IF this translator site was within the 2 mv/...
by TPT
Mon Jan 15, 2018 7:12 am
Forum: FCC Discussion
Topic: Revitalized AM Translators
Replies: 16
Views: 322

Re: Revitalized AM Translators

Something does not jibe here. Look at 47 CFR 1201 (g). A translator may be licensed anywhere within the greater of either the daytime 2 mv/m contour or a 25 mile radius of the AM transmitter site--providing that the translator's 60 dbu doesn't extend beyond either the contour or 25 mile circle. So, ...
by TPT
Wed Jan 10, 2018 4:03 pm
Forum: FM Radio
Topic: Blue tooth mixer and high school games
Replies: 22
Views: 1041

Re: Blue tooth mixer and high school games

Off-topic, but look for a lot of wireless mike systems to suddenly "die."
by TPT
Wed Jan 10, 2018 4:01 pm
Forum: AM Radio
Topic: What is this? A 5 kw Dummy Load or what?
Replies: 22
Views: 2162

Re: What is this? A 5 kw Dummy Load or what?

Some of the early hard line designs were 51.5 ohms. I can remember pulling up what looked like copper water pipe --with little ceramic insulators holding the center conductor--that was part of the late 30's installation at WSPD Toledo.
by TPT
Tue Jan 09, 2018 2:09 pm
Forum: FM Radio
Topic: Blue tooth mixer and high school games
Replies: 22
Views: 1041

Re: Blue tooth mixer and high school games

We've run into sites with no wires to the football press box...you can try an IP connection over cell, but good luck on that. So we fall back to cell. We've run into sites with just one cell provider in the area--so we have the "home phone" boxes for both GSM AT&T and CDMA Verizon. We've run into sc...
by TPT
Tue Jan 09, 2018 9:03 am
Forum: TV Engineering
Topic: Silent spot
Replies: 3
Views: 166

Re: Silent spot

The worst ones were those with black in the first few seconds of the spot....but that's back in the day when I actually did the switching & everything was either video tape or film chain.
by TPT
Tue Jan 09, 2018 7:19 am
Forum: FM Radio
Topic: Blue tooth mixer and high school games
Replies: 22
Views: 1041

Re: Blue tooth mixer and high school games

If I understand what they want to do--the Bluetooth would be used to connect their mixer to a cellphone. Google "Verizon home phone." This is a cell phone with an RJ11 (modular jack). All you need then is a regular telephone or telephone-like device to communicate...J K audio has a variety at all pr...
by TPT
Sun Dec 31, 2017 7:56 am
Forum: FM Radio
Topic: Wanted reliable monitor amp
Replies: 11
Views: 391

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.
by TPT
Sat Dec 30, 2017 12:57 pm
Forum: FM Radio
Topic: Wanted reliable monitor amp
Replies: 11
Views: 391

Re: Wanted reliable monitor amp

Comes down to $$$.

I've been buying the Chinese made Crowns recently. The "300 watt" is only $230 on Amazon. So far they seem to be working OK.
by TPT
Thu Dec 21, 2017 6:25 pm
Forum: FM Radio
Topic: simulcasting
Replies: 2
Views: 154

Re: simulcasting

§73.3556 Duplication of programming on commonly owned or time brokered stations.

Can't duplicate more than 25% of the programming where there is a 50% or greater overlap of the 70 dbu contours.
by TPT
Wed Dec 20, 2017 10:15 am
Forum: Radio Studio Engineering
Topic: Broadcast Electronics Console Model 5S150 Issues
Replies: 21
Views: 670

Re: Broadcast Electronics Console Model 5S150 Issues

With no meter switch--console designed that way. If you need a way to monitor audition levels then the best solution is a couple of outboard VU meters in a minibox. Look at the "Precision Stereo VU Meter Kit " from Jameco for $45.