Re: squeezing a field

On Sat, 26 Oct 2024 10:35:31 +0100, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:

john larkin <jl@glen--canyon.com> wrote:
>

On Fri, 25 Oct 2024 17:32:21 +0100, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:
 

Bill Sloman <bill.sloman@ieee.org> wrote:
>

On 25/10/2024 7:37 pm, Liz Tuddenham wrote:

john larkin <jl@glen--canyon.com> wrote:
 

On Thu, 24 Oct 2024 21:56:59 +0100, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:
>

john larkin <jl@glen--canyon.com> wrote:
>

On Thu, 24 Oct 2024 18:45:20 +0200, Lasse Langwadt <llc@fonz.dk>
wrote:

[...]

plugging numbers pulled out of thin air into LTSpice is better that
doing the actual measurement?

>
>

>
It is for people who don't actually work with real parts.

>
>
Peter Baxandall (of tone control and QUAD amplifier fame) claimed
to use analogue computing to work out his designs  i.e. He built
prototypes and measured them.

>
You youngsters probably don't remember a time when there wasn't
Spice.

 
Hey!!!   Who are you calling a youngster?!!!      :-)
 

I did some simulation in Basic-Plus, and it was a nuisance. My first
PC sim program was Tatum labs ECA, which required a typed netlist.
But it was pretty cool.

 
I have a spreadsheet I wrote for calculating the relationships
between resistance, capacitance, frequency and time constant (put in
two and the others appear, put in three and the error% appears).   It
also gives dB loss below or above the 'cutoff' frequency.  Some years
ago I also made some lookup tables for combinations of 5% tolerance
resistors in series and parallel.
 
Those and a pocket calculator are still the only 'computing' I use
for design work.

 
No surprise there, though I am a bit surprised that you would admit it
in public.

>
I don't understand why you use the word 'admit'.  I make my own tools to
meet my particular requirements, there is nothing shameful about that.

 
You have been admonished by Sloman. Confess your errors and beg
forgiveness.

>
My reply to that had anatomical connotations.     :-)

You refer to his fat head of course.

>
>

Have you used LT Spice? It's easy to learn and is great fun. I(t makes
time for snacking and napping too.

>
I don't think they ever did a version that would run on a Mac G3 (OS
8.6), which is my main workhorse.

Pity. Two wonderful parts of my life (after Mo of course) are LT Spice
and my reverse Polish calculators.

Get a cheap used Windows laptop, $75 maybe, just to run LT Spice. And
the Saturn PCB tools thing.