Ok, thanks. I am not going to buy any of these things now but it is good to know. Peter On Tue, 9 Jul 2002, Jim wrote: >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 > > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body