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You do not have to talk me out of soldering to the CPU. I am really not trilled to do that anyway. As far as model number - the battery seem to be "superguled" with sticky tape ( ?) so I did no

Such is part of the art in electronics. But if a designer wants to get an advanced degree in electronic art, then he also needs to match the composition resistor's long-term drift to that of the MMIC!

Attached are some useful info for making VHF and UHF reference dipoies including a neat design for an impedance matching balun using semi-ridgid coax.

Thanks for the explanation. It's been quite a while since I studied the system design. Have Fun! Reg

Is it possible that your coax is not really RG-58A/U? I created an EZNEC model of a free space 340 MHz inverted vee. The element lengths and angle between them were optimized for a 50+j0 ohm feedpoint

Certainly, the feedline can act as an impedance transformer - but it's also a phase shift. In particular, it will change the phase of the reflected wave. Let's say I have an antenna that is resonant

Why you think it bug? NanoVNA use 5k IF for measure (this firmware). But as it VNA and not SA - not need add filter for mirror supression. So you see main IF peak and mirror 5+5kHz

Frank - Thanks for the comments and information. The calibration for the first attachment was the standard Open, Short, and 50 ohm Load calibration done at the Channel 0 SMA connector on the NanoVNA.

On 7/21/21 12:33 PM, Manfred Mornhinweg wrote: >> We always knew clipleads are bad, the question is really "how bad is it" > > - A 1/4W carbon composition resistor. It has an interesting but pretty

A 10 MHz input to CH1 produces logmagnitude plots with peaks at 9.990 and 10 MHz. Source is a tinySA w/ a 40 MHz BP filter. Clean to within what my 8560A can detect :-) Have Fun! Reg

That W1DX article appeared in QST three times, November 1991, April 1977, and March 1956. There is a lot of misinformation about transmission lines/SWR in the amateur community and I suspect ARRL

I'm curious if you first calibrated the transmission line with a 50 ohm load at the far end. Does the transmission line come away from the antenna perpendicular to the elements? A half-wave dipole

There was specific mention of a 1(?)-second timeout on AT commands in one of the recent links in this thread. 73, Willie N1JBJ

Well, pretty bad! :-) Since I had the test jig set up and calibrated, I put some other 100? resistors in it. Test results of each are attached. The guinea pigs were: - A run-of-the-mill 1/4W carbon

Read also this /g/nanovna-users/message/22407?p=,,,20,0,0,0::Created,,posterid%3A4247573,20,2,20,82990168

Jim, no attachments. Dave - W?LEV

Larry, Thanks for the heads-up to the mod.

One more comment; After replacing the bezel and bottom panel. The marker could be moved with the lever to the left, but not to the right. The marker kept moving left as long as I kept the lever pushed

Thanks all for the comments. I did try three ferrites at the antenna end of the transmission line and did not see any change. Two were the clamp on type. I believe they were designed for frequencies

Jack, A few of us have removed the jog SW and added 3 push buttons instead along the front cover. Have a look in the MODs section in files for info.