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A slide rule. It's been nearly 40 years since I used one. Not sure I still remember how... 73 Stan KM4HQE

Nice find!!! Cheers, Lyle -- "Martin Glazer" <mglazer2014@...> wrote: > > > -- 73 NM6Y Bickley Consulting West https://bickleywest.com "Black holes are where God is dividing by zero" -- 73?

The kind that designed the Mercury, Gemini, and Apollo Spacecraft!

What the heck kind of ruler is that!? John

nice [email protected]> wrote:

K&E 4138? Log/Log Deci-trig?

I have a well maintained bamboo slide rule in a drawer somewhere here. Never liked the metal ones. It got me through college to a BSEE, but shortly after that, on my first full time engineering job at

Lucky you!!!!! Remember, during the Manhattan Project at Los Alamos, the Slide Rule "made" the first U and Pu supercritical masses happen. Trinity (New Mexico) proved their worth. I need to shop our

In addition to my last post, SWR / VSWR can be measured using either voltage or current. If there is SWR / VSWR on the line, both will change according to Ohm's Law. At any given point referenced

QUOTE: " So, you are saying that VSWR is based on voltage, but caused by an impedance mismatch." IF: Z(Source) = Z(XMSN Line) = Z(Load) There will be no standing waves and the SWR / VSWR will measure

Thankyou Kent, from someone who can still use a Leacher Line :-) 73 de GK8NXD

OK, for the youngsters in the group a bit of history. It's over 100 years ago.Coax has not been invented yet.There are no SWR metersThere are no VNA's.? ?(Well, an RF Bridge and a lot of math will

On Wednesday, August 10, 2022, 12:30:34 PM EDT, Russ <u.rusty@...> wrote: VSWR is a *MEASURED* voltage difference along the transmission line. Yes.

The NanoVNA-F is not an open source design. The manufacturer does not publish schematics or source code for this product. Roger

VSWR Voltage Standing Wave Ratio The cause is the impedance mismatch. The measurement is in volts.??? Kent

So, you are saying that VSWR is based on voltage, but caused by an impedance mismatch.

It's not just US broadcasting stations that are like that, in France too. I did part of my out-of-school internship at a station that was broadcasting 300 kW on 600 kHz 150kW on 890kHz All in AM,

You are all missing the message, Resonance has no effect on antenna performance so it’s not a concern if an antenna is resonant or not. I don’t think I ever saw an US AM broadcast antenna that was

I thought, at one time, that by not using the antenna at resonance (zero reactive) the bandwidth of the antenna would be widened. After adaptation (filter in 'L'), I note, by calculation, that it is