HP 4815A Vector Impedance Meter http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1722056183 http://www.tucker.com/NCCatalogs/SrchExp/sexpnc372.asp http://www.e-test.com/TABL1-10.HTM o Hewlett Packard 4815A Vector Impedance Meter o Measures impedance magnitude and phase o 500 kHz to 108 MHz in five bands o Impedance range 1 Ohm to 100 kohms o Phase angle 0 to 360 degress in two ranges o Internal calibration 100 ohms resistive o Analogue outputs for magnitude and phase indications Went for a paltry US $137.50 ... HP 4191A RF Impedance Analyzer 1 - 1000 MHz (this instrument seems like it's more suitable for component testing) http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1747099222 http://www.testequipmentdepot.com/usedequipment/hewlettpackard/impedanceanal yzers/4191a.htm Weighing in currently at US $900 or HP 4193A RF Impedance Analyzer 400 KHz to 110 MHz (a replacement for the 4815A) None currently on eBay ... http://www.testequity.com/products/149/ Jim ----- Original Message ----- From: "Peter L. Peres" To: Sent: Tuesday, July 09, 2002 2:11 PM Subject: Re: [EE]: Directional couplers & T/R test sets > On Tue, 9 Jul 2002, Jim wrote: > > > "Try to make a " > > > >'cause this technique works, is perfectly > >valid AND works from DC to as high as your > >construction techniques will allow (making > >it largely 'frequency independent') ... > > Hey, you're the guy who advocates buying suitable equipment from Ebay. > What would you use for this measurement ? > > Peter > > PS: BTW, I did 'try' and make what I proposed, for 27MHz. > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body