Search found 899 matches

by w9wi
Tue Jun 12, 2018 7:58 am
Forum: From the Trenches
Topic: Strange skills learned
Replies: 10
Views: 1742

Strange skills learned

A broadcast engineer is, of course, expected to learn on the job. Sometimes, one is expected to learn skills WAY outside the job description. Like deer herding. As I'm sure is the case at many of your stations, our employee parking lot is fenced & gated. Yesterday morning, a fawn decided to follow o...
by w9wi
Thu Jun 07, 2018 6:24 am
Forum: AM Radio
Topic: Restoring a small transmitter
Replies: 24
Views: 5151

Re: Restoring a small transmitter

Sounds like it may be an AL-811, with three 811A tubes in parallel. A copy of the manual (with schematic) is available on http://www.ameritron.com/Downloads/index.php?productid=AL-811&filename=AL-811.pdf&company=ameritron . I would be cautious about operating this amplifier at 400 watts output in br...
by w9wi
Thu May 31, 2018 3:12 pm
Forum: Everything else
Topic: Tomato Soup Incident
Replies: 22
Views: 1149

Re: Tomato Soup Incident

1. I wonder what the lab director said when he saw his vat of expensive demineralized water contaminated? :D 2. Touring a UHF TV transmitter... saw , in the middle of a few feet of insulating hose, a metal fixture with a wire attached. Seemed strange, as there was no other electrical connection. (at...
by w9wi
Thu May 24, 2018 4:24 pm
Forum: Everything else
Topic: Full Compass: online ordering issues?
Replies: 0
Views: 122

Full Compass: online ordering issues?

Anyone else having trouble with Full Compass' website? Twice this week I've tried to order something online & found the external credit card processing site never responds. I seem to have developed a bit of a sore throat at the Hamvention & was trying to avoid using my voice but it looks like that's...
by w9wi
Wed May 23, 2018 7:57 pm
Forum: FM Radio
Topic: Compression Question
Replies: 9
Views: 511

Re: Compression Question

Let me second that. We want it normalized, but would rather handle any further processing ourselves.
by w9wi
Sun May 13, 2018 6:35 pm
Forum: Everything else
Topic: Am I a possible engineer candidate?
Replies: 7
Views: 414

Re: Am I a possible engineer candidate?

Curt, so far you've heard from radio people. The situation in television is better, although I'm not going to say it's a bed of roses. - The money is better in TV. Not great, but better. I do suspect you're doing better in your current job. I will say, most folks I've run into trying to make the mov...
by w9wi
Fri May 11, 2018 3:24 pm
Forum: Ask the Engineers
Topic: Leitch Panacea reclocked outputs
Replies: 11
Views: 368

Re: Leitch Panacea reclocked outputs

Strangely enough, the Panacea manual ( http://www.imaginecommunications.com/sites/default/files/documentation/panacea_frames_and_modules_user_guide_20110501.pdf , see page 31) doesn't list 720p50 as a valid format: „ Standards of operation ‰ 525 60/1.001 ‰ 625 50 ‰ 720p 60/1.001 ‰ 720p 60 ‰ 1080i 50...
by w9wi
Fri Apr 13, 2018 8:11 am
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 2046

Re: X-Y protocol??

Thing is, you're using it for its intended purpose:)
by w9wi
Thu Apr 12, 2018 9:28 pm
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 2046

Re: X-Y protocol??

I had a frustrating issue with something similar.... I can't find it on the BMD website now, but they at one time sold a DVI extender which pushed SDI over 1694A. Worked fine for the intended purpose, but one guy thought he could use it as a DVI-to-SDI converter. Problem is, it told the computer it ...
by w9wi
Mon Apr 09, 2018 4:28 pm
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 2046

Re: X-Y protocol??

So I wasn't imagining things about RS-422. It's been a few years (like fifteen) since I've had to work on an X/Y system.

When we went digital (and before we went HD) I had to get a small Jupiter working as the back-end for a Saturn MCR. I still have nightmares.
by w9wi
Mon Apr 09, 2018 11:32 am
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 2046

Re: X-Y protocol??

That's indeed a rather broad question:) It's a way of connecting control panels to a router, introduced by Leitch. (later Harris later Imagine which still sells X/Y products) Physical connections are a 75-ohm coax bus terminated at both ends. I have a vague recollection there's a way to make it work...
by w9wi
Fri Mar 23, 2018 8:46 am
Forum: TV Engineering
Topic: Replacement for HD-Star
Replies: 6
Views: 341

Re: Replacement for HD-Star

They let me have ours back:) From the Main Menu; - Sig Info - ANC Status Any ancillary signal that's present shows up in white. (it's grayed out if it's not present) It'll also show red if the packet is present but has errors. The Setup button lets you define the three User-n options at the bottom o...
by w9wi
Thu Mar 22, 2018 4:26 pm
Forum: TV Engineering
Topic: Replacement for HD-Star
Replies: 6
Views: 341

Re: Replacement for HD-Star

Of course, one of my guys is using ours somewhere else right now... There is a screen that shows a present/not present for a variety of well-known DID/SDID combinations. At the bottom of that screen there are (IIRC) three "User" combinations you can set to anything you want. I was having problems wi...
by w9wi
Thu Mar 22, 2018 5:42 am
Forum: TV Engineering
Topic: Replacement for HD-Star
Replies: 6
Views: 341

Re: Replacement for HD-Star

We also have a Phabrix. Upsides: - Far more available tests. (for example, it will check for specific DID/SDID combinations in the ancillary data. Like NBC Namedropper cues.) - Reads AES audio. - Appears to be better built physically. - Networkable. (although we haven't looked into that function yet...
by w9wi
Sat Mar 17, 2018 10:44 pm
Forum: FCC Discussion
Topic: FM translators of AM stations
Replies: 4
Views: 328

FM translators of AM stations

I was curious -- ran a query against the facility and int_translator tables of the CDBS database this evening. 73.9% of all authorized AM stations are the listed primary of at least one FM translator license, construction permit, or application. That figure does not include AM stations which are rel...