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Here in the good ol' USofA, we have both alligator and crocodile clips.
The alligator clips are roughly 2.0 inches (5.1-cm) long while the
crocodile clips are about 1.0 inches (2.54-cm) long.

Dave - W?LEV

On Thu, Mar 16, 2023 at 3:16?PM Leif M <leif.michaelsson@...> wrote:

For clipping allicator's nails probably. In finnish language we use pike's
(the fish) jaws, they are more common here.

I believe the reason was they looked like an alligator's mouth. The
illustration I showed for the alligator clip did not show the teeth of a
classical clip.

Mike N2MS

On 03/16/2023 11:16 AM Leif M <leif.michaelsson@...> wrote:


For clipping allicator's nails probably. In finnish language we use

pike's (the fish) jaws, they are more common here.

On 03/16/2023 11:58 AM W0LEV <davearea51a@...> wrote:


Here in the good ol' USofA, we have both alligator and crocodile clips.
The alligator clips are roughly 2.0 inches (5.1-cm) long while the
crocodile clips are about 1.0 inches (2.54-cm) long.

Dave - W?LEV

For clipping allicator's nails probably. In finnish language we use pike's
(the fish) jaws, they are more common here.

On 03/16/2023 11:16 AM Leif M <leif.michaelsson@...> wrote:


For clipping allicator's nails probably. In finnish language we use pike's (the fish) jaws, they are more common here.

On 03/16/2023 9:42 AM Brian Beezley <k6sti@...> wrote:


After measuring port 2 with port 1 of his NanoVNA-H4 rev. 4.3, N6LF used his Array Solutions VNA2180 to measure both ports. At HF, port 1 resistance was about 57 ohms and port 2 was 50.5 ohms. At 100 kHz, port 1 phase was -2.22° and port 2 was -2.38°. The phase shift is due to AC coupling and can limit accuracy for some LF applications.

For VNAs like the NanoVNA that can't measure S22, accuracy for series-through impedance measurements using the S21 method depends on how much the port 2 impedance differs from 50 ohms. For the Y21 method that assumes S22 = S11 when not measured, accuracy depends on how much the port 2 impedance differs from that of port 1. Simple circuit changes can correct the port 2 impedance. Measured values were somewhat different than those predicted by a circuit model, enough so that I think any correction should be based on measured values for your particular VNA rather than on calculated values.

Brian

For anyone who might care to read said law, it's available at:

As for the use of logs, noted by Dave, W0LEV, some of us will have been taught to use 7-figure log tables in the calculation of compound interest, all those years ago!

Cheers,

Robin, G8DQX

P.S. Oddly, Augustine didn't mention the sheer folly of an aircraft for which no money would be available for replenishing armaments or for the catering corps (even more important!)

On 16/03/2023 00:55, Jim Lux wrote:

I refer you to Norm Augustine's famous paper where he plotted cost of military systems (aircraft carriers, airplanes) on log scale and it was linear. And from that, he inferred that in 20xx ( I can't remember) that the US Dept of Defense would be able afford one airplane.

It shows up in the Augustine's Laws book, but the original article is in the journal Land Warfare.

I refer you to Norm Augustine's famous paper where he plotted cost of military systems (aircraft carriers, airplanes) on log scale and it was linear. And from that, he inferred that in 20xx ( I can't remember) that the US Dept of Defense would be able afford one airplane.

It shows up in the Augustine's Laws book, but the original article is in the journal Land Warfare.

On 3/15/23 10:09 AM, W0LEV wrote:

Yes, indeed. Why don't nations, especially the US, use dB and logarithms
in their budget figures??? Can the economists not handle anything other
than linear units??????

I refer you to Norm Augustine's famous paper where he plotted cost of
military systems (aircraft carriers, airplanes) on log scale and it was
linear. And from that, he inferred that in 20xx ( I can't remember) that
the US Dept of Defense would be able afford one airplane.

It shows up in the Augustine's Laws book, but the original article is in
the journal Land Warfare.

Wow, since we have a full listing I wonder if K1YSD is among the findings?

Mike C. Sand Mtn GA

On 3/14/2023 8:00 AM, Mike M wrote:

There is an archive of 73 Magazine here:



That site has many other radio related books and magazines.

There is an archive of 73 Magazine here:



That site has many other radio related books and magazines.