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561: Difference between revisions
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Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT. | Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT. | ||
It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of 4 MHz. | It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of 4 MHz. | ||
The 561 uses the T5032 CRT, which has a glass envelope. | The 561 uses the [[T5032]] CRT, which has a glass envelope. | ||
===561A=== | ===561A=== | ||
The short lived 561 was replaced by the 561A and the | The short lived 561 was replaced by the 561A and the rack-mount version RM561A in 1962. | ||
The 561A were the highest selling model in the 560 series. | The 561A were the highest selling model in the 560 series. | ||
They introduced a revolutionary new CRT, the T5611, incorporating many “firsts” | They introduced a revolutionary new CRT, the [[T5611]], incorporating many “firsts” | ||
that would remain through most of Tek's analog scopes to follow – a rectangular faceplate | that would remain through most of Tek's analog scopes to follow – a rectangular faceplate | ||
allowing for a more compact CRT, and a ceramic CRT envelope which provided more mechanical | allowing for a more compact CRT, and a ceramic CRT envelope which provided more mechanical | ||
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It did not appear in any Tek catalog. | It did not appear in any Tek catalog. | ||
With special modified amplifier and time base ([[3A1S]] and [[3B1S]]), | With special modified amplifier and time base ([[3A1S]] and [[3B1S]]), | ||
and a special CRT (T5033), it achieved a 25 MHz system bandwidth, | and a special CRT ([[T5033]]), it achieved a 25 MHz system bandwidth, | ||
which is 2.5 times the bandwidth of a 561A. | which is 2.5 times the bandwidth of a 561A. | ||
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because the T5033 CRT has higher deflection sensitivity than the CRT used in | because the T5033 CRT has higher deflection sensitivity than the CRT used in | ||
the 561, 561A, and 561B. The vertical deflection sensitivity of the | the 561, 561A, and 561B. The vertical deflection sensitivity of the | ||
T5033 is 11.7 V/cm. The 561A has the T561 CRT which has vertical | T5033 is 11.7 V/cm. The 561A has the [[T561]] CRT which has a vertical | ||
deflection sensitivity of 19.5 V/cm. | deflection sensitivity of 19.5 V/cm. | ||