Search found 116 matches

by Slab Bulkhead
Mon Nov 07, 2016 1:02 pm
Forum: FM Radio
Topic: Theory Discussion: Circular Polarization Vs. Vertical Polarization
Replies: 46
Views: 4300

Re: Theory Discussion: Circular Polarization Vs. Vertical Polarization

Here's what an RF friend of mine thinks: "Circular polarization is probably not the best idea for FM. Broadcasters use circular polarization because they are limited in the amount of power they can broadcast with. In some states, they are limited to 100kW on an open channel- so they usually broadca...
by Slab Bulkhead
Fri Oct 21, 2016 11:49 am
Forum: Radio Automation Systems
Topic: Simian & Windows Updates
Replies: 4
Views: 736

Re: Simian & Windows Updates

Windows 10 on an automation computer would scare the snot out of me, unless I had it blocked from all internet access.
by Slab Bulkhead
Mon Oct 10, 2016 8:28 am
Forum: Everything else
Topic: Wildlife, towers, and security cameras
Replies: 10
Views: 1222

Re: Wildlife, towers, and security cameras

I need to set one of these up in my back yard. What kind of camera is that?
by Slab Bulkhead
Mon Oct 10, 2016 8:27 am
Forum: Radio Studio Engineering
Topic: Off-air monitors?
Replies: 19
Views: 3102

Re: Off-air monitors?

That's odd, I have mine running at 44.1. I think the RadioShark went through a number of different hardware iterations, maybe yours has a 32k sample rate instead. I had 2 different Shark units for testing since they were going for so cheap on eBay, one is an original white model and the second is a ...
by Slab Bulkhead
Mon Sep 26, 2016 1:28 pm
Forum: AM Radio
Topic: Setting ideas for an Optimod 9100a
Replies: 24
Views: 2930

Re: STL options

Fixing to add a translator feed over the same circuit but using Tieline Bridge-its, another pair of which we are currently using to feed another translator (no hot backup). I don't like them all that much but most of the time they're ok. Also have Cox on both ends for this other connection. The Bri...
by Slab Bulkhead
Thu Sep 15, 2016 6:58 am
Forum: FCC Discussion
Topic: Any word on the length of the pending NPT?
Replies: 25
Views: 2511

Re: Any word on the length of the pending NPT?

So, it will then be cut off at 2:00 minutes by all those decoders that haven't been recently decoded. Or perhaps even by those decoders that have been upgraded--if they left the 2 minute limit in place for the NPT. Three minutes to control the audio of all radio, TV and cable outlets in the country...
by Slab Bulkhead
Tue Sep 13, 2016 12:48 pm
Forum: On-Air Studios
Topic: Remoting sat receivers off site
Replies: 7
Views: 973

Re: Remoting sat receivers off site

Some of the Comrex units have up to four closures...Met. Opera uses this system for stations that can't use the NPR satellite. More closures? A problem. In theory should work--touch tone encode/decode devices. Worked well for me when I had to lash up 8 contact closures for a satellite program betwe...
by Slab Bulkhead
Tue Sep 13, 2016 12:44 pm
Forum: STL Engineering
Topic: Good ole analog
Replies: 22
Views: 2936

Re: Good ole analog

W2XJ wrote:Be careful. Your license is only valid for one form of emission unless you have two separate frequencies licensed.
Both systems have licenses on the books.
by Slab Bulkhead
Tue Sep 13, 2016 12:37 pm
Forum: AM Radio
Topic: Setting ideas for an Optimod 9100a
Replies: 24
Views: 2930

Re: Setting ideas for an Optimod 9100a

Microwave is not an option when one fails to deal with line of sight issues. Thought actually expressed by a corporate engineer: "(not an exact quote) go find those trees impinging on the Fresnel zone and have them cut down!" This same individual would probably recommend bringing in a wrecking ball...
by Slab Bulkhead
Mon Sep 12, 2016 1:33 pm
Forum: AM Radio
Topic: Setting ideas for an Optimod 9100a
Replies: 24
Views: 2930

Re: Setting ideas for an Optimod 9100a

I help take care of an outfit that has an 8k analog circuit feeding an AM and a 15k digital (nailed up ISDN) feeding the FM translator. Since the telco charges on distance, and the sites are just 2-3 miles from the station, it was cheaper to use PTP circuits. I suppose we are screwed if they decide ...
by Slab Bulkhead
Mon Sep 12, 2016 1:26 pm
Forum: Everything else
Topic: On the venerable TRS plug.....
Replies: 6
Views: 866

Re: On the venerable TRS plug.....

if you're on Verizon it isn't active & you can't activate it This is why I don't "buy" subsidized phones. This. Never again...unlocked secondhand devices for me, please. This sounds like just another example of Apple's "too hip for the room" attitude and penchant for forcing the user to buy expensi...
by Slab Bulkhead
Mon Sep 12, 2016 1:23 pm
Forum: STL Engineering
Topic: Good ole analog
Replies: 22
Views: 2936

Re: Good ole analog

I have one of the Nicom analog units as a backup. Haven't used it for a while but it worked last time it was tried. The primary is a Starlink digital which works great since the path is short (2.5 miles). The transmitter site is in a metro area but was a black hole for internet. The only service ava...
by Slab Bulkhead
Fri Sep 02, 2016 9:33 am
Forum: Radio Studio Engineering
Topic: Off-air monitors?
Replies: 19
Views: 3102

Re: Off-air monitors?

Sure! I'll try and go from memory as I had to do a lot of fiddling with it to get it to work. Most of this involved the code to control the RadioShark which is somewhat old now and depends on old USB HID libraries that weren't available on the Raspbian package archives, so I had to hunt them up and ...
by Slab Bulkhead
Tue Aug 30, 2016 8:52 am
Forum: Radio Studio Engineering
Topic: Off-air monitors?
Replies: 19
Views: 3102

Re: Off-air monitors?

I made the mistake of getting one of those RS80 tuners for an air monitor at an LPFM station. Bad move. The reception was noisy more often than not, and I have a feeling it was either lack of sensitivity (the tower was about 2.5 miles away) and lack of adjacent channel rejection as the LP was on a 2...
by Slab Bulkhead
Fri Aug 19, 2016 7:58 am
Forum: FM Radio
Topic: Whistling Birdie in FM signal
Replies: 29
Views: 3182

Re: Whistling Birdie in FM signal

When I first got into engineering at a college radio station, we always had this problem with a birdie in the air monitor. I have to think it was the heterodyne from our dinky 8 watt ERP signal not having enough oomph to override the co-channel 50kW boomer that we were on the far fringe of.