RE: Coaxial Switches - use with spectrum analyzer and gear?

1.582.3141 Fax 651.582.7599 -Original Message- From: Scott Lacey [mailto:sco...@world.std.com] Sent: Saturday, May 25, 2002 11:00 AM To: Christman, Timothy (STP) Cc: emc-p...@majordomo.ieee.org Subject: RE: Coaxial Switches - use with spectrum analyzer and gear? Timothy, I'm som

RE: Coaxial Switches - use with spectrum analyzer and gear?

This may not be the effect being referred to, but... Relays require a ferromagnetic alloy, such as Kovar for the contacts. The leads leading to the connector are more likely beryllium copper or some similar material. The weld or joint between them forms a thermoelectrically active junction, and

RE: ITE equipment in Petrol Station (Gas) outlets

For the US angle, the National Electric Code has an extensive discussion of Hazardous (Classified) Environments (Ch. 5?) -- it might be useful to examine those recommendations to get ideas. I'm not sure what classification applies to gas stations -- link below to OSHA has a couple good tables...

RE: Revised EMC standards and CE Declarations. [Frivolous -- del ete]

[Frivolous punchline coming, delete if not interested] There's not difference, actually -- the violin player's head is just much larger, making the relative size of the violin seem smaller to the observer. In truth -- The viola is slightly larger, tuned differently (In 5ths? C-G-D-A?) and has

RE: Tetanization

This observation has probably been made many times, but isn't it ironic that the peak muscle clamping strength straddles European and US mains frequencies? Timothy J. Christman Test Engineer Tel 651.582.3141 Fax 651.582.7599 timothy.christ...@guidant.com Guidant Corporation 4100 Hamline Ave. N.

RE: question of flex circuit materials

This prompts another question that I've wondered about -- do the physical properties of polyamide substrates change radically w/ environment? I've heard that water absorption is one issue, for instance. How does this affect k, and things like dielectric withstand voltage? I would imagine tha

RE: Noise from flourescent light ballasts?

Not sure if this is germane to the list, but... Many newer fluorescent fixtures use an "electronic ballast" -- they use a switching converter or flyback to develop the high voltage required for the bulbs (laptop backlight elements work the same way). Apparently this reduces the amount of iron r