Search found 495 matches

by PID_Stop
Thu Jan 18, 2018 12:34 pm
Forum: TV Engineering
Topic: Audio board EQ for newscasts
Replies: 7
Views: 101

Re: Audio board EQ for newscasts

Agree with the last. Our Wheatstone board lets us do all sorts of EQ and dynamics processing on each channel, most of which is unused. In general, my experience has been that if you need substantial EQ for studio pickup, you're probably not using the most suitable mic for the job.

Jeff
by PID_Stop
Wed Jan 17, 2018 12:10 pm
Forum: Ask the Engineers
Topic: BVH2500_BVT2000 Interface_Performance
Replies: 9
Views: 122

Re: BVH2500_BVT2000 Interface_Performance

Hooray!!! So glad that did the trick for you. You're right about the people who designed these machines -- Sony flew several of them to San Jose for some reason or other, and those of us who were there for the two-week maintenance course (just for the BVH-2000 -- the BVT-2000 course was a third week...
by PID_Stop
Wed Jan 17, 2018 11:51 am
Forum: Master Control
Topic: Advice on choice...
Replies: 7
Views: 4274

Re: Advice on choice...

Since this thread got spam-bumped, guess I'll add an on-topic note. We installed a Ross Ultrix router about six months ago, fitted out as 72x72 SDI, to be the core of our automation rebuild. The thing is only 2RU high (not including the 1RU power supply), and includes clean/quiet switching that can ...
by PID_Stop
Wed Jan 17, 2018 9:32 am
Forum: Ask the Engineers
Topic: BVH2500_BVT2000 Interface_Performance
Replies: 9
Views: 122

Re: BVH2500_BVT2000 Interface_Performance

Heh. Carbon tet anyone? :lol: It's stunning to consider the chemicals we used so freely in the control room not so long ago. Isopropyl alcohol, xylene, and Freon TF for cleaning VTRs... carbon tetrachloride for degreasing... and trichloroethane as a carrier for dissolved wax, to clean film and mini...
by PID_Stop
Tue Jan 16, 2018 4:29 pm
Forum: Ask the Engineers
Topic: BVH2500_BVT2000 Interface_Performance
Replies: 9
Views: 122

Re: BVH2500_BVT2000 Interface_Performance

Jeff, Playback from the confidence head is really ragged . . more than sparkles . . looks like tape damage from that head. I just dug into the BVH-2500 manual, and I would need to do some real study, but it looks like maybe both heads might go through the rotary preamp, not just the play head as on...
by PID_Stop
Tue Jan 16, 2018 1:33 pm
Forum: Ask the Engineers
Topic: BVH2500_BVT2000 Interface_Performance
Replies: 9
Views: 122

Re: BVH2500_BVT2000 Interface_Performance

Okay, here's an update after taking a look at the remains of our old 2500... 1) The switch I was thinking about to get rid of the sparkles is called "R/P MODE", and is to the left of the fluorescent readout on the control panel. The setting to try is the bottom "CONFI HEAD", which is the equivalent ...
by PID_Stop
Tue Jan 16, 2018 1:09 pm
Forum: Ask the Engineers
Topic: BVH2500_BVT2000 Interface_Performance
Replies: 9
Views: 122

Re: BVH2500_BVT2000 Interface_Performance

Greg, That kind of sparkle is commonly caused by bad sliprings or brushes. On a BVH-2000/2500, power for the preamp mounted to the inside of the upper drum, plus control signals to the dynamic tracking actuators, goes through these brushes. Try changing from the "PLAY" head to the "R/P" head -- the ...
by PID_Stop
Tue Nov 21, 2017 3:31 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 261

Re: BVH-2000 guide retraction

It was striking to see how different facilities were "Ampex stations" or "Sony stations". We went from Ampex quad machines to Sony one-inch; the other stations in town were all Ampex. I wound up getting a fair amount of freelance repair work in Rochester -- for some reason, while TV stations, which ...
by PID_Stop
Tue Nov 21, 2017 12:18 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 261

Re: BVH-2000 guide retraction

What you're after, Sony calls the threading motor, and there are no belts involved: it's a gearmotor assembly that slowly spins a metal wheel with an offset pin that pulls the guide linkage out and pushes it back... Why the heck didn't Panasonic think of that? Replacing the threading drive belt in ...
by PID_Stop
Mon Nov 20, 2017 1:54 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 261

Re: BVH-2000 guide retraction

For inquiring minds, here are the different test modes you can get by setting rotary switches on the CD-17 board and pressing the button under the bottom rotary switch: 2 - 0 - 0: Supply reel torque check (must have a new one-hour reel on the supply reel) 3 - 0 - 0: Takeup reel torque check (must ha...
by PID_Stop
Mon Nov 20, 2017 1:40 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 261

Re: BVH-2000 guide retraction

What you're after, Sony calls the threading motor, and there are no belts involved: it's a gearmotor assembly that slowly spins a metal wheel with an offset pin that pulls the guide linkage out and pushes it back. If memory serves, the wheel also has a magnet attached to trip reed switches to tell t...
by PID_Stop
Mon Nov 13, 2017 12:36 pm
Forum: Ask the Engineers
Topic: Convert to LEDs, or leave 110v?
Replies: 10
Views: 524

Re: Convert to LEDs, or leave 110v?

Or if you have some other reason for wanting to eliminate the 110VAC component entirely (the noise of the relay, for instance), NAPA sells 12v LED truck marker lights in a variety of sizes and shapes, most of which are around $10-20. They're bright, easily mounted, and you don't need to mess with re...
by PID_Stop
Tue Oct 24, 2017 7:45 am
Forum: Everything else
Topic: Weatherized cable/antenna identification tags
Replies: 6
Views: 489

Re: Weatherized cable/antenna identification tags

A similar solution would be brass valve number tags, which are a stock item, and are inexpensive. A plumbing supply house should have them, as does Grainger.

Jeff
by PID_Stop
Thu Oct 19, 2017 3:03 pm
Forum: TV Engineering
Topic: More Bad Sports Audio on Fox
Replies: 9
Views: 638

Re: More Bad Sports Audio on Fox

...it is a disservice to put out a product where most listeners can't understand Joe because of a bad mix. No disagreement there. I'm simply observing that it's not a trivial exercise to make a mix that sounds good in mono and in stereo and in 5.1, especially in a sub-par environment like a truck.
by PID_Stop
Thu Oct 19, 2017 12:11 pm
Forum: TV Engineering
Topic: More Bad Sports Audio on Fox
Replies: 9
Views: 638

Re: More Bad Sports Audio on Fox

Another factor in play is the number of ways people listen to the audio -- everything from small monaural sets to stereo to large 5.1 surround setups. A reasonable 5.1 mix with lots of crowd ambience might not downmix well to stereo, or to mono. Moreover, you have the vagaries of how stations map au...