Search found 894 matches

by w9wi
Fri Dec 14, 2018 9:15 am
Forum: FM Radio
Topic: High Reflected Power Puzzle
Replies: 19
Views: 426

Re: High Reflected Power Puzzle

Agreed with Ray, I wouldn't be putting that thing back on the air until you know why it's oscillating off-frequency. I am decidedly NOT a communications lawyer but... Has the FCC been notified the station is off the air? https://www.law.cornell.edu/cfr/text/47/73.1740 , if you're off for more than t...
by w9wi
Mon Dec 10, 2018 3:36 pm
Forum: TV Engineering
Topic: Computer-controlled small L-band switches?
Replies: 9
Views: 254

Re: Computer-controlled small L-band switches?

The last three places I've worked in have all used Quintech gear. The current place I am in uses an Evertz. I called Quintech on Friday & was told Evertz has bought the company. Quintech also seems to be Compusat's recommendation. I've got literature on the way.. (edit: always read ALL the replies ...
by w9wi
Thu Dec 06, 2018 5:16 pm
Forum: TV Engineering
Topic: Computer-controlled small L-band switches?
Replies: 9
Views: 254

Computer-controlled small L-band switches?

We use Compusat software to control assorted IRDs and four steerable dishes. Part of the mix.. are three old Standard Agile Omni analog receivers. They're used only as RF switches, H/V and C/Ku. We figure they aren't going to live forever. (although given how long they've been up, maybe they *are* i...
by w9wi
Mon Nov 05, 2018 10:41 am
Forum: Everything else
Topic: Eastern Time CAP RWT last week?
Replies: 1
Views: 203

Eastern Time CAP RWT last week?

We didn't get one. We did get the Central Time RWT. Anyone else miss this?

It doesn't seem to be a "sticky" issue as *this* week's Eastern Time CAP RWT went active 40 minutes ago.
by w9wi
Fri Oct 19, 2018 7:11 pm
Forum: Radio Automation Systems
Topic: Suppressing Windows 10 Update and Forced Reboots
Replies: 17
Views: 745

Re: Suppressing Windows 10 Update and Forced Reboots

I've managed to suppress it on the machine in my hamshack. (having it force a reboot during a contest "run" would likely result in the uttering of some words not suitable for broadcast. Although since I work mostly CW, only Ms. Cat would hear them..) Of course, that happened long enough ago I'm not ...
by w9wi
Wed Oct 03, 2018 3:02 pm
Forum: Everything else
Topic: RING MY BELL
Replies: 21
Views: 507

Re: RING MY BELL

Worked fine (both smartphones and EAS) in Nashville.

We did see IPAWS go offline *after* the test, between 3:28 and 3:40 Central. (has anyone else seen that?)
by w9wi
Mon Aug 27, 2018 6:13 am
Forum: TV Studio Engineering
Topic: Genlock
Replies: 6
Views: 1172

Re: Genlock

If you're recording each camera to its own recorder, you don't need genlock. Genlock is necessary only if you're connecting the cameras to a video switcher and recording all three on the *same* recorder. If you did need genlock it would need to be applied to all three cameras. It would not strictly ...
by w9wi
Sat Aug 25, 2018 10:56 am
Forum: General Computers
Topic: computer dropping off network
Replies: 11
Views: 635

Re: computer dropping off network

Power management?

Hams have been reporting issues with ports being turned off by Windows when it (wrongly) concludes they aren't in use.
by w9wi
Tue Aug 14, 2018 8:33 pm
Forum: FM Radio
Topic: 500w translator
Replies: 16
Views: 721

Re: 500w translator

A check of the FCC database shows twenty-seven FM translators authorized with ERPs in excess of 250 watts. Thirteen are in Alaska where the Commission has waived various translator rules for some time. (the biggest is K220AD Valdez, running 1.09kW. ) W297BT New Britain, Connecticut seems to be a typ...
by w9wi
Tue Aug 14, 2018 6:24 am
Forum: Everything else
Topic: WWV WWVH
Replies: 16
Views: 775

Re: WWV WWVH

I'm curious about the telephone service, which I frequently use as a "sanity check" of NTP installations & GPS clocks. The article says "NIST said eliminating funding currently “supporting fundamental measurement dissemination...” which leads me to believe they do mean everything that has to do with...
by w9wi
Tue Aug 07, 2018 6:46 pm
Forum: FM Radio
Topic: 500w translator
Replies: 16
Views: 721

Re: 500w translator

If you look at the application https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/forms/prod/cdbsmenu.hts?context=25&appn=101787282&formid=1&fac_num=166073 that's exactly what happened. Reference Exhibit 7 for what the ERP & TPO *should* be. Weren't C4 stations supposed to get 12kW? At 10.5kW I'd su...
by w9wi
Wed Jul 04, 2018 6:21 am
Forum: AM Radio
Topic: Anyone Home?
Replies: 13
Views: 630

Re: Anyone Home?

...and the station aired a combination of "This is the Yankees Radio Network" and 1000 Hz tone, from around 11pm until the morning show started at 5am. This is not at all unfamiliar to DXers, who encounter this kind of thing on various frequencies with amusing and frustrating frequency... =========...
by w9wi
Fri Jun 22, 2018 2:16 pm
Forum: Ask the Engineers
Topic: RF Triangulation - number of devices
Replies: 10
Views: 333

Re: RF Triangulation - number of devices

Is it possible to use several RTL SDR DVB-T dongles (RTL2832U+R820T) to determine the number of devices within different zones? (traingulation) I am interested in being able to record the number of active devices (smartphones, cell phones) in different locations in space/time. I don't have to know ...
by w9wi
Wed Jun 20, 2018 1:30 pm
Forum: Ask the Engineers
Topic: Peaking a dish alone
Replies: 5
Views: 246

Re: Peaking a dish alone

I was rather surprised at the Arris. I expected to have to manually enter PIDs, but best I can tell there is no way to do so on that IRD. It worked fine on the old SD feeds. On hindsight.. my boss tuned the RX8200 & he didn't say anything about having to manually enter PIDs. Although he used Compusa...