[Test-Equipment] question

[rbethman]

I spent too many hours in a Link Trainer in the Early '60s.

The "side" of the beam where A was heard changed when you went through 
the "cone of silence" and came out the other side.  These things could 
confuse you no end.

They were spaced 200mi apart.  You had to switch over from one to the 
next quickly.

Too many old memories!

Just remember, it took significantly more than the filter!

Bob - N0DGN

Fuqua, Bill L wrote:
> Thanks for the reply. 
> I was wondering how many out there knew what these were.
> Kind of reminded me of an experiment a Physics Professor and I did  in our department.
> We made up a list of questions for the faculty to answer with out using a calculator or anyother
> reference.  The questions were mostly simple constants such  the log base 10 of 2. Square root of
> two to as many digits you could remember and pi as well and others. 
>   We were discussing how much younger students miss out on by not doing calculations by hand or using
> a slide rule. 
>    Well, guess what. Just about all the younger professors failed the test. 
> I teach classes in radio theory and construction on the weekends for students of all ages.
> I am introducing them to nomograms thinking that using these will give them an intuitive feel of 
> what values to use or where to start in making simple RF circuits and to recognize grossly incorrect results in calculations.
>    It always baffled my associate engineer when I would make something using a tuned circuit and
> pick out a variable capacitor and wind a coil and it worked. Naturally, I did not tell him that the variable 
> capacitor gave me a lot of slack but still, he and others would not have an idea where to even start.
> This came from building a lot of HB transmitters and receivers when I was a kid.
>
> 73 
>