El Cheapo Mosfets

Discussion in 'Radio Circuits, Repair & Performance' started by KL7AJ, Oct 17, 2019.

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  1. KL7AJ

    KL7AJ Ham Member QRZ Page

    I inherited a pile of SN7000 N-channel mosfets. According to the official literature, these are really only suitable for switching applications. Not so.

    Any switching transistor can be made to work in a linear mode....and sometimes they work better than devices MADE for linear operation.

    I did have to fiddle around with the bias scheme to make these fellers happy in class A... I used a "self biasing" topology with an additional high resistance (1 Megohm) between the gate and ground. These things work exceptionally well clear up through HF....I didn't even try them out even higher..they may work there too.

    Anyway....at 17 cents a pop, they're certainly worth 'sperimenting with.
    N6ALT likes this.
  2. KL7AJ

    KL7AJ Ham Member QRZ Page

    Building myself a regenerative LF receiver to start with
  3. N1OOQ

    N1OOQ Ham Member QRZ Page

    Er uh, 2N7000?
  4. KL7AJ

    KL7AJ Ham Member QRZ Page

    Yeah...those too. :)
  5. WL7PM

    WL7PM Ham Member QRZ Page

    3 terminal devices have progressed marvelously since the CK722.
    you can wrap a finger around a kilowatt.
  6. WA9SVD

    WA9SVD Ham Member QRZ Page

    How many is a "pile?:confused:"
  7. KL7AJ

    KL7AJ Ham Member QRZ Page

    A few hunnert
  8. WA9SVD

    WA9SVD Ham Member QRZ Page

    Can I "relieve you" of a dozen or so for reasonable reimbursement? I'll even pay USPS. (I don't think the Pony Express goes out your way...:D:rolleyes: I'll send you an e-mail if further info is needed.
    Last edited: Nov 7, 2019
  9. K8ERV

    K8ERV Ham Member QRZ Page

    10 fewer than a bazillion.

    TOM K8ERV Montrose Colo

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