Re: squeezing a field

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?

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

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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.
--
Bill Sloman, Sydney