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3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom
3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom

3M M23 or M56 or M79 Head Stack Test Setup Owned By Dale Manquen 3M Mincom

$ 52.27

Availability: 71 in stock
  • Brand: 3M Mincom
  • All returns accepted: ReturnsNotAccepted

    Description

    I was going to say this was custom made by Dale Manquen, but it fits the box awfully well, this might have been a 3M factory made item, but I don't know what it was used for. I was told it was a testing system for 3M Mincom tape recorder head stacks, but I can't confirm that.
    It has a very heavy steel enclosure to safely contain a card cage with six cards in it. There are four buffer amplifier cards with high quality CTS pots on them, one erase osc card, and one bias osc card.
    There are four cables coming out of it, and I have photographed the pins very carefully for you. One of those is a Winchester connector.
    (On a related note, I should mention here that Synhouse did a complete buyout of the entire test fixture inventory of Ampex, buying every multitrack audio recorder test set, test box, alignment jig they had, from 440 to MM1200, all of it, and it's still in stock since 8 years ago.)
    Working condition unknown, sold as-is for parts/repair, no returns/refunds.
    Dale Manquen was an electronic engineer/designer at 3M Mincom tape recorder division in Camarillo, California, and later his company was MANCO. Synhouse has dozens of items from the Dale Manquen estate, mostly NOS 3M PCBs/PCBAs from the 1960s and 1970s, but also three card cages, test jigs, and other items, some of which the function was only known to him. I will try to list all these in 2021, so please see my other listings or search "3M M23".
    Shipping
    This will be VERY safely packed for shipment. I really, really pack things correctly (here in this 31st year I've been in the international mail order business).
    Free local pickup in the Los Feliz district of L.A. is okay if you can
    work around my busy schedule.
    Please see my other listings for professional audio snakes, with one very nice Gepco snake listed, and ask me if you are looking for anything in particular or would like something custom made from new-looking cable stock and connectors, Synhouse has it all. I can list if you ask about anything you are looking for specifically.