Search found 832 matches

by TPT
Sat Apr 13, 2019 7:20 am
Forum: Ask the Engineers
Topic: Audio dropouts on Yankees game broadcasts
Replies: 28
Views: 610

Re: Audio dropouts on Yankees game broadcasts

Yes, most satellite receivers can handle multiple programs at once. Typical geosynchronous satellite has a number of different block converters that receive an up-linked signal from a ground station in the 6 ghz band and re-transmitted in C band (3.5~4.2 ghz). Each transponder typically serves a par...
by TPT
Mon Apr 08, 2019 6:19 am
Forum: Ask the Engineers
Topic: Audio dropouts on Yankees game broadcasts
Replies: 28
Views: 610

Re: Audio dropouts on Yankees game broadcasts

Understand that many of these airborne military radars have moved into the Ku band, so shouldn't be a problem now. Usually you could tell what they were because you would get a pattern of increase then decrease as the plane or helicopter passed by: burp....burp....burp.burp.burp.burp..burp...burp......
by TPT
Sun Apr 07, 2019 6:46 pm
Forum: Ask the Engineers
Topic: Audio dropouts on Yankees game broadcasts
Replies: 28
Views: 610

Re: Audio dropouts on Yankees game broadcasts

The bandpass filter is probably an "AWACS" filter, airborne radar used with military planes runs just outside of the satellite frequencies.
by TPT
Sun Apr 07, 2019 8:31 am
Forum: Radio Studio Engineering
Topic: How to bridge 600 ohm balanced line to monitor or record?
Replies: 7
Views: 292

Re: How to bridge 600 ohm balanced line to monitor or record?

All three connections are (probably) balanced audio. So you don't want to hook any kind of unbalanced amp or computer across the program line, since this may introduce hum or RF into the audio. You can find Henry matchbox devices on E-bay fairly cheap--be aware that everything is labeled backwards o...
by TPT
Wed Mar 27, 2019 7:12 am
Forum: STL Engineering
Topic: STL recommendations
Replies: 3
Views: 207

Re: STL recommendations

In ascending order: 1. Haven't heard much good said about Nicom 2. Have a pair of Marti composite units in service at one location I look after. The newest pair is about 7 years old. The power supplies in the Marti's are prone to failure, however, they are Meanwell supplies so replacements are not d...
by TPT
Wed Mar 20, 2019 6:03 am
Forum: TV Engineering
Topic: Cheap Chyron
Replies: 5
Views: 179

Re: Cheap Chyron

Older switcher, don't know the model.
by TPT
Tue Mar 19, 2019 8:32 am
Forum: TV Engineering
Topic: Cheap Chyron
Replies: 5
Views: 179

Cheap Chyron

Last time I worked in TV we worked with a high band Ampex 1000--which finally got pulled to create space for an Ampex cart player (ACR-25?) I take care of a college radio station, just got off a call with the prof. who teaches radio/tv production. Her "Chyron" in their TV production studio died, rep...
by TPT
Sat Mar 16, 2019 4:43 pm
Forum: Radio Automation Systems
Topic: Suppressing Windows 10 Update and Forced Reboots
Replies: 24
Views: 1002

Re: Suppressing Windows 10 Update and Forced Reboots

Isolating an air machine from the internet would be the simple solution. However, we have two studios 20 miles apart, --and my ops manager is in Denver. Need remote access.
by TPT
Sat Mar 09, 2019 5:10 pm
Forum: AM Radio
Topic: AM Translators
Replies: 10
Views: 285

Re: AM Translators

As long as the translator 60 dbu stays inside the 25 mile circle from the AM transmitter, cutting back from 50 kw to 250 watts would not make any difference --even if the translator's 60 dbu now extends outside the AM station's reduced 2 mv/m.
by TPT
Sat Mar 09, 2019 6:23 am
Forum: AM Radio
Topic: AM Translators
Replies: 10
Views: 285

Re: AM Translators

over 1600 meters AHAAT (or 5300 feet) for 54 km. But that's not the point. The rule on translator location is the GREATER of 25 miles or the 2 mv/m contour. So if your 2 mv goes out 54 kilometers (33 miles) you could put a translator in a town 26 miles out with a 6 mile 60 dbu contour. At 250 watts,...
by TPT
Fri Mar 08, 2019 3:32 pm
Forum: AM Radio
Topic: AM Translators
Replies: 10
Views: 285

Re: AM Translators

We had an 11 day power outage in 2012 when a "derecho" came through Now let's suppose the AM is without power, but the translator is on because it is in the same tower as a TV station with back-up power. I suspect the Commission would not fuss if you kept programming that translator. If the AM trans...
by TPT
Fri Mar 08, 2019 11:58 am
Forum: AM Radio
Topic: AM Translators
Replies: 10
Views: 285

Re: AM Translators

Let's start with Section 74.1231 which permits a translator for a daytimer to stay on when the AM station is off: (h) An FM translator station that rebroadcasts a Class D AM radio broadcast station as its primary station may originate programming during the hours the primary station is not operating...
by TPT
Wed Mar 06, 2019 1:01 pm
Forum: Radio Automation Systems
Topic: STORQ Users--Look at the new Storq 2
Replies: 12
Views: 1226

Re: STORQ Users--Downgrade coming

I kept Simian in line for both our stations. We carry Delilah on one station in the evenings, and another show--Mike Harvey--on the weekends. On the other station we take an internet feed for a morning show (off a Barix) and Alice Cooper at night off satellite. As well as Steelers during football. L...
by TPT
Tue Mar 05, 2019 3:40 pm
Forum: Everything else
Topic: Making a case for factoring malicious use of potent energy
Replies: 11
Views: 650

Re: Making a case for factoring malicious use of potent energy

Some suspicion that the effects noted by US diplomats in Havana ( headaches, blurred vision) might have been the result of relatively high-powered microwave energy aimed at their building. It is possible to listen to conversations by aiming microwave carriers at windows, then detecting the minute am...
by TPT
Tue Mar 05, 2019 7:23 am
Forum: Ask the Engineers
Topic: Remote Start AEQ BC 500 - Automation
Replies: 10
Views: 294

Re: Remote Start AEQ BC 500 - Automation

The simple solution may be a small plastic box with a push button. We have the new STORQ combo sat receivers/automation system for WW One programming. A simple contact closure is needed to start the programming back up after a local break. Normally our Simian automation commands this with an externa...