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==Internals== | ==Internals== | ||
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=== 3" CRT === | === 3" CRT === | ||
The move to use a 3” CRT rather than a 5” was to produce a “portable” oscilloscope, which the 315-D was promoted as. With dimensions considerably smaller than the 5” models and only weighing a modest 36 pounds, it offers a lot of performance in a small package. In [[introduced_in_1956|1956]], Tek introduced a rack mount version, the 315R. One has to wonder what the benefit of a 3" screen is when it was packaged as a rack sized instrument. Instruments originally used a purchased 3WP_ CRT. A mod was published in 1964 substituting the Tek-made T3100 CRT, part numbers 154-0362-00 through 154-0366-00, depending on the phosphor. | The move to use a 3” CRT rather than a 5” was to produce a “portable” oscilloscope, which the 315-D was promoted as. With dimensions considerably smaller than the 5” models and only weighing a modest 36 pounds, it offers a lot of performance in a small package. In [[introduced_in_1956|1956]], Tek introduced a rack mount version, the 315R. One has to wonder what the benefit of a 3" screen is when it was packaged as a rack sized instrument. Instruments originally used a purchased 3WP_ CRT. A mod was published in 1964 substituting the Tek-made [[T3100|T3100 CRT]], part numbers 154-0362-00 through 154-0366-00, depending on the phosphor. | ||
=== Delay Line === | === Delay Line === |