General > General Technical Chat
You know you're old when.....
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TimFox:
Especially on simple estimations, such as if the resonant frequency needs to change by 10%, the capacitor value needs to change by 20%. 
Or if a R-C hp filter needs its corner to shift by 10%, what is a 10% increase in the resistor value.
An exact calculation requires a calculator, but is not always necessary.
Cerebus:


Preceded by:



and similarly:


Wolfgang:
... when the first computer you used expected input in the form of punched cards.  8)
Gregg:
When your first bicycle had skip tooth chain and replacement chains were readily available in many hardware type stores.  I still don't understand why these chains even existed.
Brumby:

--- Quote from: Gregg on July 12, 2021, 02:29:06 am ---When your first bicycle had skip tooth chain and replacement chains were readily available in many hardware type stores.  I still don't understand why these chains even existed.

--- End quote ---
They made perfect sense on a chainsaw.  Don't know about bicycles.


Ah.  After some ferreting around it appears that had something to do with differing "standards" in bike chains as they evolved to what we see today.



So, then.... It seems I'm not that old.   ;D
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