Actually, back in the Apple][ days, the BNC was not commonly used for video and particularly not for NTSC video. The most common connector for video back then was the PL259 (?), which was really common on "security" monitors and others of that ilk. I've still got a few of them from back then, and that's what they had on them. It wasn't uncommon to see them with two of the things for chaining them, though that probably wasn't common on monitors for the home computer market. Dick ----- Original Message ----- From: "Tony Duell" <ard(a)p850ug1.demon.co.uk> To: <classiccmp(a)classiccmp.org> Sent: Wednesday, January 23, 2002 5:25 PM Subject: Re: Bell & Howell Apple II update

Well, I don't know what sort of equipment you were dealing with, but it was well into the '80's before I ever saw a piece of NTSC video equipment with BNC connectors on it. Those BNC's were generally used for 50-ohm equipment and not used with 75 ohm video gear. BNC's were all over the EE labs, but not on the video distribution amplifiers I occasionally saw. I didn't work in the video industry, John, but I did work with computers all the while. Monitors of the time, at least of the NTSC-compatible type, were typically equipped with PL-259 connectors on the rear. The only video monitors I encountered with BNC connectors on them were the high-frequency, then-mono, types, from Motorola, intended for use as "page" monitors. I suppose there may have been BNC's on high-end fixed-frequency displays, even then, but the NTSC gear in the old catalogs, etc, that I've become accustomed to seeing over the years have always used the PL-259's until the 'F' types became more common. Those were the same ones that were on the antenna and not-too-common set-top equipment I first saw in the late '70's, and also what was in use on every monitor in the various lecture rooms at the Colorado School of Mines, Denver University, and Colorado University that I ever saw back then. By the time consumer video equipment became popular, the PL-259, which was also common in the '70's for other 75-ohm applications e.g. antennas and the like, had been replaced by the 'F' types in video hookups, since those were MUCH cheaper. Dick ----- Original Message ----- From: "John Allain" <allain(a)panix.com> To: <classiccmp(a)classiccmp.org> Sent: Thursday, January 24, 2002 10:37 AM Subject: Re: Bell & Howell Apple II update

On Thu, 24 Jan 2002, Dan Veeneman wrote: When I worked for our city's 'Public Access' cable station, we had numerous pieces of equipemnt left over from the 70s that had UHF (PL-259) connectors used for baseband video. I rember them being on monitors and UMatic decks that we had laying around (and they were probably on a few other things I never got to see). I still have some UHF->BNC adaptors laying around from when I used to play with that stuff. -- Pat