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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]] with help from [[Phil Crosby]]. | |||
The Type J's tentative announcement was in 1963. | 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. | |||
It appears to be similar to the [[1A1]], | |||
which was [[introduced in 1964]]. | which was [[introduced in 1964]]. | ||
The [[547]] training guide, dated December 30th, 1963 mentions "a new dual trace plug-in, the 1A1 (also known as the J)." | |||
Note: The Type J does not have a [[547#Spoiler_Switch|spoiler switch]] hole in the rear panel, while the 1A1 does have such a hole. | |||
* [http://w140.com/Tek_Type_J_tentative.pdf Tektronix Type J Tentative Specs (PDF)] | <!-- * [http://w140.com/Tek_Type_J_tentative.pdf Tektronix Type J Tentative Specs (PDF)] --> | ||
* [[Media:type_j_tentative.pdf|Tektronix Type J Tentative Specs (PDF, OCR)]] | |||
<gallery> | <gallery> | ||
Tek type j 1.jpg | |||
Tek type j 2.jpg | |||
Tek type j 3.jpg | |||
Tek type j 4.jpg | |||
Tek type j 5.jpg | |||
Tek type j 6.jpg | |||
Tek type j 7.jpg | |||
Tek type j 8.jpg | |||
Tek type j in case.jpg | Tek type j in case.jpg | ||
Tek type j.jpg | Tek type j.jpg | ||
Dec 1963 service scope type j.png|Reference to Type J in December 1963 Service Scope | |||
Late tek type j front.jpg|Late Type J with spoiler switch hole | |||
Late tek type j left.jpg|Late Type J with spoiler switch hole | |||
Late tek type j right.jpg|Late Type J with spoiler switch hole | |||
Late tek type j rear.jpg|Late Type J with spoiler switch hole | |||
</gallery> | </gallery> | ||
[[Category:500 series plugins]] | [[Category:500 series plugins]] | ||
[[Category:Prototypes]] | |||