Search found 615 matches

by PID_Stop
Mon May 20, 2019 6:35 am
Forum: TV Engineering
Topic: VHF Low Band OTA antennas
Replies: 3
Views: 269

Re: VHF Low Band OTA antennas

These folks make some nice made in USA antennas,, UHF and VHF types: https://store.antennasdirect.com/HD-TV-antennas.html We have a number of viewers who have used their antennas quite successfully -- but our market is all UHF. I could be wrong, but I don't recall any of their models extending down...
by PID_Stop
Mon May 13, 2019 7:11 am
Forum: Ask the Engineers
Topic: BVH-2000: Color flickering
Replies: 6
Views: 447

Re: BVH-2000: Color flickering

But it's just funny to know while having an early 70's Soviet b/w VTR also using a 1" tape with very similar tape mechanism design (single-head helical scan drum with almost 360° grip) that is surprisingly able to write in SECAM with stable colors (on a originally black-and-white machine that doesn...
by PID_Stop
Fri May 10, 2019 7:33 am
Forum: TV Engineering
Topic: VHF Low Band OTA antennas
Replies: 3
Views: 269

Re: VHF Low Band OTA antennas

Solid Signal has several candidates that extend down to the VHF low band. Here are several, in no particular order:

Xtreme Signal HD8200XL, $119.99

Winegard HD8200U, $134.99

Channel Master CM3016, $69

Channel Master CM3020, $119.99

Jeff
by PID_Stop
Thu May 09, 2019 2:52 pm
Forum: FM Radio
Topic: Harris HT-35CD No filament voltage.
Replies: 8
Views: 464

Re: Harris HT-35CD No filament voltage.

AS I recall, the schematic I was looking at said we should have 11V triggering the SSR, which we checked for and it was present. If you have a scope handy, you might want to take a closer look at that trigger voltage and make sure you really have solid DC on the relay input and not a train of pulse...
by PID_Stop
Thu May 09, 2019 7:57 am
Forum: Ask the Engineers
Topic: BVH-2000: Color flickering
Replies: 6
Views: 447

Re: BVH-2000: Color flickering

(If you remember the old Ampex 2" quad machines, the corrector for horizontal error was called AMTEC, and the corrector for color was COLORTEC.) Just to be clear: AMTEC and COLORTEC are pre-digital systems, and worked by passing the RF signal from the tape through voltage-controlled variable analog...
by PID_Stop
Thu May 09, 2019 7:47 am
Forum: Ask the Engineers
Topic: BVH-2000: Color flickering
Replies: 6
Views: 447

Re: BVH-2000: Color flickering

Yes, this BVH-2000 allows to install 4 cards on it. Even very early revisions of the BVH-2000 had the four slots assigned for the plug-in TBC, but you would need to modify some of the other cards before it would work. Only a machine above a particular serial number would take the BKH without doing ...
by PID_Stop
Tue May 07, 2019 3:22 pm
Forum: Ask the Engineers
Topic: BVH-2000: Color flickering
Replies: 6
Views: 447

Re: BVH-2000: Color flickering

Yes indeed, the unstable color is because there is no time base correction. The BVH-2000 needs to run either with an external BVT-2000 using a special umbilical cable, or the four-card BKH-2015 TBC (assuming that the machine isn't one of the very early versions). If there were a servo failure, you w...
by PID_Stop
Fri May 03, 2019 7:14 am
Forum: Radio Studio Engineering
Topic: Audio cable for AM transmitter site? Star Quad or Ethernet or What?
Replies: 22
Views: 485

Re: Audio cable for AM transmitter site? Star Quad or Ethernet or What?

I am not sure why anyone would build an analog plant in 2019. AOIP with fiber from each room to the tech core is the solution. Analog microphone runs should be short and good cable used there. I like double shielded quad core in any case. If you have a large facility and don't mind buying equipment...
by PID_Stop
Thu May 02, 2019 8:53 am
Forum: Radio Studio Engineering
Topic: Audio cable for AM transmitter site? Star Quad or Ethernet or What?
Replies: 22
Views: 485

Re: Audio cable for AM transmitter site? Star Quad or Ethernet or What?

Don't forget to put the shrink on BEFORE terminating the wire! :D For those of us who date back to using large multicore cables for studio cameras (think GE PE-350 or Ikegami HK-357), it's "don't forget to put the boot and shell on the cable before soldering all those wires!" Some of our younger st...
by PID_Stop
Wed May 01, 2019 8:43 am
Forum: TV Engineering
Topic: NBC Namedropper Trigger Configuration Help
Replies: 26
Views: 753

Re: NBC Namedropper Trigger Configuration / METAR server

The NWS METAR site is tgftp.nws.noaa.gov , which currently resolves to 140.90.101.79. I can use Filezilla to drill down through their folders and grab the actual coded text file Evertz uses. When the Namedropper temperature stops working, I bypass and reboot first. If that doesn't work, I ping tgft...
by PID_Stop
Tue Apr 30, 2019 12:36 pm
Forum: TV Engineering
Topic: NBC Namedropper Trigger Configuration Help
Replies: 26
Views: 753

NBC Namedropper Trigger Configuration / METAR server

For those of you who have been missing the temperature on the Today Show graphics since last week: the current known working METAR IP address is now 140.90.101.79 . It's changed several times over the last few months, and Evertz got me this latest address this morning -- and both of our Namedroppers...
by PID_Stop
Tue Apr 30, 2019 10:19 am
Forum: Radio Studio Engineering
Topic: Audio cable for AM transmitter site? Star Quad or Ethernet or What?
Replies: 22
Views: 485

Re: Audio cable for AM transmitter site? Star Quad or Ethernet or What?

... 3M had just come out with nifty little dispensers with rolls of plastic adhesive numeral marker tapes (0 - 9). Those are the ScotchCode numbers of which I wrote. I certainly hope they've improved the adhesive since 1985! (And kudos for not ending that sentence with a preposition -- my English t...
by PID_Stop
Tue Apr 30, 2019 7:45 am
Forum: Radio Studio Engineering
Topic: Audio cable for AM transmitter site? Star Quad or Ethernet or What?
Replies: 22
Views: 485

Re: Audio cable for AM transmitter site? Star Quad or Ethernet or What?

TPT wrote:
Mon Apr 29, 2019 1:19 pm
Belden 8451 two wires, foil shield. Thousands of feet in use around the country in all kinds of studios.
Heck, we have literally miles of 8451 and 9451 just in our building alone!

:lol:

Jeff
by PID_Stop
Tue Apr 30, 2019 7:30 am
Forum: Radio Studio Engineering
Topic: Audio cable for AM transmitter site? Star Quad or Ethernet or What?
Replies: 22
Views: 485

Re: Audio cable for AM transmitter site? Star Quad or Ethernet or What?

Since we have a diversity of opinion here, I'll broaden it a bit: 1) Belden 8451 is excellent for analog line-level signals, but 9451 is easier to work with: the foil shield is bonded to the jacket, so it strips cleanly. Otherwise, the two are identical. In our plant, 20-50 feet is a relatively shor...
by PID_Stop
Mon Apr 29, 2019 9:39 am
Forum: TV Engineering
Topic: NBC Namedropper Trigger Configuration Help
Replies: 26
Views: 753

Re: NBC Namedropper Trigger Configuration Help

I'm probably wrong, but I always figured the Ku space was cheaper, which is why they started Ku and stuck with it. Another reason for choosing Ku in the beginning could have been TI. C-band TI was still a thing in the mid-80s...AT&T Long Lines didn't turn down the TD-2 microwave systems in this are...