Summary

27" presentation monitor by NetTV, originally manufactured by Sampo in Taiwan in 1998. Intended for use in institutional and professional environments. Has composite, s-video, and VGA input with powerful stereo sound and subwoofer. Chassis can be modded for RGB. This set is a rebadge of a Sampo SME-72DL3.

(Special thanks to Matthew Kobriger for some of the pics!)

Manuals

• SME-23DL3 User Manual (Closest equivalent)
• SME-23 and 72DL3 Spec Sheet
• NetTV DTV34X Spec Sheet (Closest equivalent)
• SME-23DL3 Service Manual (Closest equivalent)

Promo Materials

• Official NetTV Webpage
• FCC ID Page

Notes

Chassis can be modified for RGB. You can follow a guide on Michael J. Moffitt's website HERE

Toshiba Microfilter Technology

This CRT uses Microfilter, a technology innovation by Toshiba that aimed to optimize both brightness and contrast without darkening the glass with tint.

Conventionally, most tubes have a dark tint layer in the glass to reduce the amount of light reflection or absorption of the glass, thereby increasing contrast performance - a trade that costs an average 30% loss of overall brightness in all ambient light conditions (including near-darkness). In comparison, clear glass on a tube has the advantage of maximum brightness emission - but at a huge loss of contrast in normal ambient light conditions due to increased reflection. Typically you'll only find clear glass on professional broadcast monitors (aka BVM) that are intended to be used in near-darkness where ambient light is not an concern.

Microfilter aimed to be the best of both worlds by achieving the necessary amount of ambient light filtering at a per-phosphor (micro) level without sacrificing brightness, while still providing the vivid contrast you could typically only expect from a dark-tinted lower-brightness tube. On a Microfilter tube, the glass itself remains clear for maximum light transmission, while still taking a darkened grey-purple appearance from a combination of both the AR coatings and Microfilter over the phosphors.

You can learn more about Microfilter in our full article.