Search found 317 matches

by Dave Loudin
Thu Mar 20, 2014 6:19 am
Forum: AM Radio
Topic: Is AM radio "Dead Man Walking"? It doesn't have to be!
Replies: 23
Views: 3684

Re: Is AM radio "Dead Man Walking"? It doesn't have to be!

Well, I suspect you may not have captured my bottom line point. I perceive that you see RF broadcasting as one of a multiverse of methods of connecting listeners to specific program streams not hosted by the transmitting station. My contention is broadcasters are ALREADY relaying off-site program st...
by Dave Loudin
Mon Mar 17, 2014 7:04 am
Forum: AM Radio
Topic: Is AM radio "Dead Man Walking"? It doesn't have to be!
Replies: 23
Views: 3684

Re: Is AM radio "Dead Man Walking"? It doesn't have to be!

Cottagefarmer, believe it or not, but a large number of AM and FM stations are essentially streaming channels now. What might seem to you as a local oldies station likely originates in a studio in another Texas town and is delivered to the station via satellite. Your station plays prerecorded locali...
by Dave Loudin
Wed Sep 04, 2013 10:37 pm
Forum: Ham Radio
Topic: Takeoff Angle of Vertical Monopole
Replies: 1
Views: 911

Re: Takeoff Angle of Vertical Monopole

We struggled with this at VOA when trying to model a nominal whip antenna located at a random height for reception. Obviously, the result was a statistic, not an actual measured pattern, but the it was consistent with what you are showing. We needed some rigor in order to properly use the propagatio...
by Dave Loudin
Mon Jun 17, 2013 5:00 am
Forum: AM Radio
Topic: AM Day & Night Power ??
Replies: 14
Views: 2539

AM Day & Night Power ??

In my haste, I was talking about a similar situation, a tornado warning that happened just before critical hours. I dropped power as usual, but was told I could have stayed at the full kW.
by Dave Loudin
Fri Jun 07, 2013 7:53 am
Forum: AM Radio
Topic: AM Day & Night Power ??
Replies: 14
Views: 2539

AM Day & Night Power ??

If I recall correctly, if you get an EAS alert, you can stay on with day power, even in the absence of nighttime authorization.

Ok, enough thread drift.
by Dave Loudin
Sat Jun 01, 2013 10:06 am
Forum: AM Radio
Topic: AM Day & Night Power ??
Replies: 14
Views: 2539

AM Day & Night Power ??

Although your country may not have any regulations, Vietnam has likely notified an international coordination body of your existing operations. Check with your regulatory body to see if or what that may be. If your operation has already been coordinated internationally, any changes will have to also...
by Dave Loudin
Thu Mar 07, 2013 2:17 pm
Forum: FM Radio
Topic: What type of contours?
Replies: 12
Views: 2357

What type of contours?

I've noticed the same for translators.
by Dave Loudin
Wed Feb 06, 2013 8:08 pm
Forum: TV Engineering
Topic: Lynx Alarm Muting
Replies: 6
Views: 1459

Lynx Alarm Muting

Insane text pages would be an excellent rock band name.
by Dave Loudin
Thu Jan 31, 2013 6:36 am
Forum: Digital Television
Topic: RF Analog DA for Digital?
Replies: 9
Views: 2738

Analog DA for Digital?

So, without the DA, reception is spotty or nonexistent? Another thing about Rat Shak amps - high noise figures. If that DA has a higher noise figure than your tuner, then it will not help at all. You sure you are looking for the right RF channel and that your antenna is actually designed for that ba...
by Dave Loudin
Thu Dec 13, 2012 10:16 pm
Forum: AM Radio
Topic: Dinosaur question
Replies: 22
Views: 3371

Dinosaur question

How about another departure? Towards the end of my time at VOA engineering, I was part of a team that visited some of the older sites to start planning for possible rehab projects. When we first visited Bethany, an original 100kW beastie was still there and in use (perhaps pushing 10 kW on a good da...
by Dave Loudin
Tue Nov 27, 2012 9:56 pm
Forum: AM Radio
Topic: WBAL Experimental Permit
Replies: 23
Views: 4395

WBAL Experimental Permit

WBAL's site is on the western edge of Baltimore County, so they would not need a synchro to fill in missing metro coverage, even though the pattern is pretty tight to the west (about 90 mV/m/km). There's not many potential listeners in the null until you get to Frederick, which may be too far away f...
by Dave Loudin
Tue Nov 27, 2012 2:54 pm
Forum: AM Radio
Topic: WBAL Experimental Permit
Replies: 23
Views: 4395

WBAL Experimental Permit

WBAL is a Class A on 1090. I sincerely doubt CBS would shut the analog off, except, perhaps after midnight. They have zero coverage west to protect KAAY.
by Dave Loudin
Mon Nov 19, 2012 5:52 am
Forum: Administrator Announcements
Topic: Time sure flies...
Replies: 11
Views: 4676

Time sure flies...

That's the remote meter in the manager's office, right? Too bad the station is a Class C.
by Dave Loudin
Thu Nov 15, 2012 11:22 pm
Forum: AM Radio
Topic: BE AM 6A Mod
Replies: 21
Views: 5881

BE AM 6A Mod

Yes, that was Streisand singing a Gibb song. The arrangement was classic Bee Gees.