{"product_id":"mcintosh-mi3-tube-maximum-performance-indicator-restored-in-2023","title":"McIntosh MI3 Tube Maximum Performance Indicator - Restored in 2023","description":"\u003cp\u003e\u003cb\u003eGeneral:\u003c\/b\u003e\u003cbr\u003eThe McIntosh MI-3 is a unique vintage oscilloscope designed to measure multipath distortion from stereo tuners. Using the front controls you can also set the scope mode to L+R audio where the oscilloscope then reacts to incoming signals. We do not get these often so when these are set up at our testing bench it is a treat.\u003cbr\u003e\u003cbr\u003eThey look awesome at night especially!\u003cbr\u003e\u003cbr\u003eOne of the coolest pieces of 1960's McIntosh equipment, and a perfect addition to any vintage system containing a tuner. Or if you want a super cool light show, it can connect to any system with a a tape or output. This would be a perfect match with a vintage McIntosh tuner such as a MR73.\u003cbr\u003e\u003cbr\u003eThis will be shipped with care in an original McIntosh box which is an absolute must for units like this with CRT displays.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSkyFi Cosmetic Notes:\u003c\/b\u003e\u003cbr\u003eThis is a super clean example of the MI-3. We cannot find any noticeable imperfections in the glass and the chassis is also in very good shape.\u003cbr\u003e\u003cbr\u003eThe included manual is a reprint, not an original document.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSkyFi Technical Notes:\u003c\/b\u003e\u003cbr\u003eThis device was restored by Analog Sound Labs in 2023. The restoration included an extensive rebuild of the power supply. \u003cbr\u003e\u003cbr\u003eWe double checked the performance of the unit with an MR78. The CRT is bright with only light burn in spots to the right of the center mark.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eBrand Background:\u003c\/b\u003e\u003cbr\u003eMcIntosh Laboratory is an American manufacturer of handcrafted high-end audio equipment based in Binghamton, New York. The company was founded in 1949 by Frank McIntosh. The company designs and produces audio amplifiers, stereo tuners and other consumer electronics products.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eOwnership:\u003c\/b\u003e\u003cbr\u003eSecond Owner\u003cbr\u003e\u003cbr\u003e\u003cb\u003eConnections:\u003c\/b\u003e\u003cbr\u003eRCA inputs and outputs, Captive power cord\u003cbr\u003e\u003cbr\u003e\u003cb\u003eGeneral Sound:\u003c\/b\u003e\u003cbr\u003eAccurate to the recording\u003cbr\u003e\u003cbr\u003e\u003cb\u003eCosmetic Condition:\u003c\/b\u003e\u003cbr\u003e8\/10 = Very Good. Excellent front faceplate, one minor flaw on chassis side or top. See our detailed rating description \u003ca href=\"https:\/\/skyfiaudio.com\/pages\/our-rating-scale\" target=\"_blank\"\u003ehere\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWorking Condition:\u003c\/b\u003e\u003cbr\u003eWorking perfectly and tested in our lab.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eIncluded:\u003c\/b\u003e\u003cbr\u003eUnit, Box, Manual\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePacking:\u003c\/b\u003e\u003cbr\u003eOriginal Manufacturers Packing\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecs:\u003c\/b\u003e\u003cbr\u003eSpecifications\u003cbr\u003e- CRT Type: 3-inch cathode ray tube (3RP1)\u003cbr\u003eDisplay Modes\u003cbr\u003e- Oscilloscope\u003cbr\u003e- Relative signal strength meter\u003cbr\u003e- FM deviation meter\u003cbr\u003e- Channel balance meter\u003cbr\u003e- Phase indicator\u003cbr\u003eSensitivity\u003cbr\u003e- Signal Strength (Vertical): 700 mV\u003cbr\u003e- Audio (Vertical): 20 mV\u003cbr\u003e- Audio (Horizontal): 20 mV\u003cbr\u003e- FM Deviation (Horizontal): ±350 mV\u003cbr\u003eTube \u0026amp; Semiconductor Complement\u003cbr\u003e- 1 × 3RP1 — CRT display tube\u003cbr\u003e- 4 × 6EA8 — Deflection amplifiers\u003cbr\u003e- 1 × 6EA8 — Voltage regulator\u003cbr\u003e- 2 × OB2 — Voltage regulators\u003cbr\u003e- 4 × Silicon planar transistors\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDimensions:\u003c\/b\u003e\u003cbr\u003e16.00 in x 5.44 in x 13.00\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e\u003cbr\u003e23 lbs.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eApproximate Age:\u003c\/b\u003e\u003cbr\u003e1964\u003cbr\u003e\u003cbr\u003e\u003cb\u003eLink to Manual:\u003c\/b\u003e\u003cbr\u003e\u003ca href=\"https:\/\/www.berners.ch\/McIntosh\/Downloads\/MI3_own.pdf\" target=\"_blank\"\u003eClick Here\u003c\/a\u003e\u003c\/p\u003e","brand":"McIntosh","offers":[{"title":"Default Title","offer_id":48236463718654,"sku":"107703","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0003\/3275\/9084\/files\/mcintosh-mi3-tube-maximum-performance-indicator-restored-in-2023-accessory-793.jpg?v=1779391599","url":"https:\/\/skyfiaudio.com\/en-gb\/products\/mcintosh-mi3-tube-maximum-performance-indicator-restored-in-2023","provider":"SkyFi Audio","version":"1.0","type":"link"}