Werlatone directional couplers are based on a transformer design, with a whopping big block of ferrite used as the sensing element. Unlike wall-style directional couplers, one thing you must NEVER do is exceed the power rating of the coupler. Even a short-term overload can change the nature of the ferrite, and there goes your calibration. Not that I'm complaining about Werlatone; used within their ratings, they last forever.
BTW, urban legend has it that the name comes from the founder's name; something like Werla or Werlat. Ed Ed Price [email protected] WB6WSN NARTE Certified EMC Engineer & Technician Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military & Avionics EMC Is Our Specialty ________________________________ From: hansm [mailto:[email protected]] Sent: Wednesday, September 08, 2004 11:43 AM To: [email protected] Subject: Thanks, Re: Directional couplers Thanks! I got the info I needed! Hans Mellberg Engineering Manager BACL, a TCB and an EU CAB 230 Commercial Street Sunnyvale CA 94085 USA 408-732-9162 x38 408-732-9164 fax ----- Original Message ----- From: [email protected] To: [email protected] ; [email protected] ; [email protected] Sent: Wednesday, September 08, 2004 11:23 AM Subject: RE: Directional couplers John and Hans, Thanks for the good reference. The Werlatone directional couplers look very nice. Here is a link to the Werlatone website: http://www.werlatone.com/index.cfm?area=0&pageid=12 Sounds like an old-time electronic company name and it is easy to remember. This comes to mind: But a Werlatone solid state electronic organ today and get 25% off! Featuring 75 transistors! No more tubes to replace! Dave Cuthbert Micron Technology -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John McAuley Sent: Wednesday, September 08, 2004 11:57 AM To: hansm; EMC-PSTC Subject: RE: Directional couplers Hi It is Werlatone, Brewster NY. they make a directional coupler that covers 10 kHz to 1000 MHz in a single unit which is very useful for EMC test set ups. We have two that are rather old now and have given very good service. They appear to supply more to the OEM market for incorporation into other equipment. John McAuley Compliance Engineering Ireland Ltd Ratoath Road Ashbourne Co Meath Ireland Tel: +353 1 8256722 www.cei.ie This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
