Look at this article: "THE SECRET WORLD OF OSCILLOSCOPE PROBES" by Doug Ford.
It will explain where the extra resistance is coming from and what it is for (TLDNR - it's for suppressing ringing of 1:10 probe at high frequencies where the cable of the probe starts looking like a transmission line). http://www.dfad.com.au/links/THE%20SECRET%20WORLD%20OF%20PROBES%20OCt09.pdf On Mon, May 4, 2020 at 6:48 AM Victor Rosenthal 4X6GP <k2vco....@gmail.com> wrote: > > I like the way scope probes have a tip that hooks onto a component lead, > and a little alligator clip for the ground. So I thought I could use a > passive scope probe in the X1 position on my DVM too. I hooked one up > with a BNC-bannana adapter, but it turns out that there seems to be a > series resistance of about 250 ohms, which is inconvenient for > resistance measurements. I got the same result from several probes. > > My question is, what's going on here? Schematics of probes I found all > showed that in the X1 position they were straight through. > -- > 73, > Victor, 4X6GP > Rehovot, Israel > Formerly K2VCO > CWops no. 5 > http://www.qsl.net/k2vco/ > ______________________________________________________________ > 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 alexeyk...@gmail.com -- Alexey Kats (neko) ______________________________________________________________ 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
