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VNA

w2dwl #12872 Question I see there's 3 of these "VNAs", one has small screen about 2.5 inches, another is VNA-4, and another VNA-F, Are the all the same or is there a big difference in what they do?Sent via the Samsung Galaxy S10, an AT&T 5G Evolution capable smartphone
W0LEV All Messages By This Member #12878 Personally, I prefer the -F as it has a metal case better at keeping ambient RF fields out of the electronics of the instrument. The small screen of the original is spiff, but just a bit too small for my senior eyes. Dave - W?LEV toggle quoted message Show quoted text On Fri, Apr 24, 2020 at 4:12 PM w2dwl <w2dwl@...> wrote: Question I see there's 3 of these "VNAs", one has small screen about 2.5 inches, another is VNA-4, and another VNA-F, Are the all the same or is there a big difference in what they do?Sent via the Samsung Galaxy S10, an AT&T 5G Evolution capable smartphone -- Dave - W?LEV Just Let Darwin Work Just Think
hwalker All Messages By This Member #12880 On Fri, Apr 24, 2020 at 04:14 PM, David Eckhardt wrote: ... Personally, I prefer the -F as it has a metal case better at keeping ambient RF fields out of the electronics of the instrument... ====================================================== David, The shielding of a case is only as good as the minimum apertures in it and the opening for the -F's 4" display is like a wide open door for ambient RF fields. The sensitive RF areas of the -F, -H v3.4, and -H4 all have shields on-board to protect them from ambient fields. The-F's metal case is more durable, it has a larger capacity battery, and the resolution of the 4" display is superior to the other NanoVNA variants. The virtual drive for upgrading the firmware is also more user friendly. All are much more of a reason than shielding to prefer the -F. The other variants also have their plus and minuses. - Herb
w2dwl #12881 Thank you for your input.?Sent via the Samsung Galaxy S10, an AT&T 5G Evolution capable smartphone toggle quoted message Show quoted text -------- Original message --------From: hwalker <herbwalker2476@...> Date: 4/24/20 21:32 (GMT-05:00) To: [email protected] Subject: Re: [nanovna-users] VNA On Fri, Apr 24, 2020 at 04:14 PM, David Eckhardt wrote: ... Personally, I prefer the -F as it has a metal case better at keeping ambient RF fields out of the electronics of the instrument...======================================================David,? The shielding of a case is only as good as the minimum apertures in it and the opening for the -F's 4" display is like a wide open door for ambient RF fields.? The sensitive RF areas of the -F, -H v3.4, and -H4 all have shields on-board to protect them from ambient fields.? The-F's metal case is more durable, it has a larger capacity battery, and the resolution of the 4" display is superior to the other NanoVNA variants.? The virtual drive for upgrading the firmware is also more user friendly. All are much more of a reason than shielding to prefer the -F.? The other variants also have their plus and minuses.- Herb
Ron Spencer N4XD All Messages By This Member #12886 If you're planning n buying one I suggest the -H4. It goes to over 1Ghz, has TDR already loaded and is available from R&L Electronics for $60 or so which is a fine price. I've one and really like the larger screen vs the original nanovna which I also have. Ron N4XD

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