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Those Curta calculators were the bomb for rally drivers in the '70s, but a bit rich (they still are) for my budget. The designer came up with the idea while he was in a WWII concentration camp IIRC.

My guess is that you may not be opening it with administrator privileges. Check your PC user account to see if it is a Standard or Adminstrator, and change as necessary. If it is already

Hello Folks, I am trying to install Nano-Saver for the first time. I downloaded Version 0.4 and unzipped it to my PC. When I run the .exe file a DOS type window opens and then NOTHING else happens.

Hi Doug, If you get round to experimenting with horizontal wires, bear in mind that the wire might stretch and sag under its own weight, depending on length and gauge of the wire. It is better to use

Hi I remember my late Father had a White slide rule. He had. EE from UCLA. he used at work. Martin N6QLh

Hi Christian I do lots of antennas on fiberglass PC Board, and typically the published Er value was measured at 1 kHz, At 2.4 GHz, Er is going to be in the 3.7-3.8 range.? You can check their spec

Hi I have a NanoVNA V2 Plus4. I am trying to validate a PCB 50 ohm transmission line (trace) to be used for 2.4 GHz Wifi. I am using a 4 layer stack-up (1.6 mm total) with the following configuration:

For all those slide rule fans out there. Check out this website: https://www.sphere.bc.ca/test/sruniverse.html

Ok, folks, let’s take the slide rule discussion offline, even though it’s very interesting. I have a Pickett C18-T made for Collins Radio, amongst other slide rules and enjoy yakking about them.

Upgrading to version 0.4.0 fixed this. On connect nvna-s now sets scan range to that set in the device.

https://en.wikipedia.org/wiki/Curta Photos of my Curta calculator in my left hand…

My favorite slide rule precision story: Student doing slide rule on a timed quiz and needs to multiply 2X3. He mumbles, “Two times three is 5.999. Oh Hell, call it six!” Larry AC9OX

Hi Joe Well, typically a dipole at resonance is near 70 Ohms (Resistive), and needs help in some form to get to 50 Ohms. Making the dipole longer, or shorter, Is moving around those complex

OK, how many of you had a Curta calculator? It looked like a black soup can with a crank on the top. You would set numbers on dials and crank the crank until the display stopped changing. That was

I have a Dietzgen rule with "folded" C and D scales which enable reading to 4 decimal places and specialized scales for solving triangles. I also have several circular rules, including some

Guilty as charged! As for finding it again…

Hi Doug, Lots of good advice has already been given about the antenna feedpoint impedance. Here are some important questions about your measurement: 1. Did you measure at the feedpoint? 2. If not, and

This brings me to a thought that I have had for many years.? Just to nit pick a bit more for science, I hear people say that they "cut the dipole to 50 ohm resonance" when in actuality I believe that

I too was once a slide rule user, the Pickett / Collins C-19T. Microwave Path calculation rule. Used it up until the advent of computer calculation programs. Anything's an improvement on doing it

I had a college Slide Rule class after the USAF (1970). The instructor took a full-sized K&E DeciLon and pulled the slide 2/3 out. Then he flexed the two ends down so that it looked like a bow. He