Vintage Tektronix Type 561B Oscillioscope With Types: 2B67, & 3A6 Plug-Ins - $150 - (Bozeman, MT)
TEKTRONIX TYPE 581 B oscilloscope Has type 3A6 vertical trace plug-in and 2B67 time base Has a tag attached which reads SERVICEABLE VERTICAL CONTROL OF TRACE DOES NOT WORK A or B Unit powers on and lights up I don’t know much about these Selling for parts or repair from TEKWIKI Tektronix 561 10(4) MHz "General Purpose Scope" Tektronix 561B Produced from 1961 to 1974 Manuals Tektronix RM561 Manual (PDF) Tektronix 561A Manual (PDF) Tektronix 561B Manual (PDF) Tektronix 561S Manual (PDF) Tektronix 560 and 561 Product Release (PDF) Tektronix 561 Instrument Reference Book (OCR, PDF) Tektronix 561 Manual (BAMA, PDF) Tektronix 561A Manual (BAMA, DjVu) Tektronix 561B Manual (BAMA, DjVu) Manuals – Specifications – Links – Pictures The Tektronix 561 is a 560-series scope that was introduced in 1961 and produced in various versions well into the 1970s. Versions Over its life, the 561 was actually a series of four very different scopes, plus the rack mount versions of each. 561 The original 561 and RM561 were introduced in 1961. 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. The 561 uses the T5032 CRT, which has a glass envelope. 561A 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. They introduced a revolutionary new CRT, the T5610, incorporating many “firsts” 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 precision than a blown glass tube. This also enabled the use of a separate face plate made from a flat glass panel that could have the graticule markings printed on the phosphor side of the faceplate, totally eliminating parallax errors, and allowing for better edge illumination. The 561A supports all 2 and 3 series…
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