As Lasse notes, life must have been cheap in those days.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Den mandag den 22. juni 2015 kl. 19.39.06 UTC+2 skrev John Larkin:
g sis
I'm sure there still is, stuff with stuff like this:
stuff like screw machines,
-Lasse
-Lasse
-- Here's one I've had around for a while: https://www.dropbox.com/s/dhwrbf1eh8eunfd/Dscn1697.png?dl=0 John Fields
--- HMM...
You must have missed my post:
If you're working with cores that can be saturated, you can put an extra winding on the core and run enough DC through it to get the core close to saturation. That'll decrease the inductance and, if you start with a frequency somewhat lower than what you want, the change in inductance will allow you to tune it to the frequency you want.
Look up "saturable reactor"...
I actually tried it using a junkbox transformer with a 120V 60Hz primary and a 24V 300 mA secondary, like this,
. SIG . GEN . +-----+ . | ~|--[10k]----+--------+------+ . | | | | | DC . | | | | [300nF] SUPPLY . | | | | | +------+ . | | [SCOPE] [COUNTER] + +--|+ Iadj|---+----+ . | | | | P||S | | | | . | | | | R||E | | [POT]
By chance, is their patron saint Rube Goldberg?
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