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The '''Tektronix Type J''' is a 35 MHz dual-trace plug-in for [[500-series scopes]] which never went into production. | The '''Tektronix Type J''' is a 35 MHz dual-trace plug-in for [[500-series scopes]] which never went into production. | ||
It was designed by [[Ron Olson]]. | It was designed by [[Ron Olson]] with help from [[Phil Crosby]]. | ||
Regarding Type J development with Ron Olson, Phil Crosby recalls: | |||
<blockquote> | |||
I was helping him to pursue parasitic oscillations (we used to call it "bird hunting"). | |||
It was common to say when an amplifier had a parasitic oscillation to say that it "sung". | |||
At one point I was peering closely at a J unit prototype while Ron was probing it and a finger on his left hand touched the +225. | |||
The reflex caused the back of his hand to strike my nose pretty hard. | |||
Damn near bloodied it. | |||
Vacuum-tube voltages and solid-state devices had an uneasy relationship. | |||
In those days, a common probing tool was the point of a #2 pencil. | |||
</blockquote> | |||
The Type J's tentative announcement was in 1963. | The Type J's tentative announcement was in 1963. | ||