For measuring voltage drop.. I would measure the voltage drop from the Plus lead of the Power supply to the plus lead on the back of the radio while in full load TX (FM or RTTY).
It should be less than 0.1 or 0.2 of a volt. Then, do the same on the Negative Lead. You should see the same answer (assuming Negative DC doesn't find an alternative path). Those numbers should add up to the same voltage drop total. As a reminder. It only takes 1 ohm of loss in the cable/fuses to significantly impact your full power out. Mike va3mw On Sat, Dec 28, 2019 at 11:00 AM Don Wilhelm <donw...@embarqmail.com> wrote: > Better precision than a battery can be found by using a precision > voltage regulator. Take a look at the Precision Voltage Source on my > website www.w3fpr.com. > > 73, > Don W3FPR > > On 12/27/2019 5:53 PM, Bill Frantz wrote: > > A simple reality test for a volt meter is to measure a fresh battery. > > Zinc/carbon or Alkaline should show about 1.56 volts. (I learned this > > test from the bias setting instructions for a Dynakit Stereo 70 > > amplifier. They built the amp so the test point read 1.56 volts when the > > bias is correctly set and suggested calibrating your meter with a > > battery. In that era, the zinc/carbon battery was what ran almost all of > > the flashlights (torches for for English speakers) in the world. > > > > 73 Bill AE6JV > > > > On 12/23/19 at 11:30 PM, rmcg...@blomand.net (Bob McGraw K4TAX) wrote: > > > >> A good, known accurate DVM is an asset to any station. Use it to > >> determine if the others are accurate. There are several good brands > >> available. A DVM that is not accurate is worse than no DVM at all. > >> My choice of many years ago is my Fluke 77. After I tapped it with > >> too much voltage, I sent it to Fluke for repair and calibration. I am > >> confident when I make a measurement it is accurate without question. > > ------------------------------------------------------------------------- > > Bill Frantz | The first thing you need when | Periwinkle > > (408)356-8506 | using a perimeter defense is a | 16345 Englewood Ave > > www.pwpconsult.com | perimeter. | Los Gatos, CA > 95032 > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to donw...@embarqmail.com > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to va...@portcredit.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
