Sources for 1N3307 zener

Discussion in 'Amateur Radio Amplifiers' started by N4IDA, Jun 30, 2019.

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  1. N4IDA

    N4IDA Ham Member QRZ Page

    Anybody know a good, cheaper source for the 1N3307 zener diode.
    that is one expensive diode.

  2. W7UUU

    W7UUU Principal Moderator Lifetime Member 133 Administrator Volunteer Moderator Platinum Subscriber Life Member QRZ Page

  3. K7JEM

    K7JEM Ham Member QRZ Page

    What is it being used in? Can you replace it with something else, like a transistor and a smaller zener? Or possibly a regulator of some type?
  4. W4KJG

    W4KJG Subscriber QRZ Page

    Maybe I am missing something. But, $10 from most national sources (Allied, Newark, etc.,) for a needed part like a 50 watt stud mount zener doesn't sound out of range or outrageous.

  5. K7JEM

    K7JEM Ham Member QRZ Page

    Your Allied link shows 0 available. Minimum order of 25, looks like.
  6. KD8DEY

    KD8DEY Ham Member QRZ Page

    Talon has a 25w version for under $6
  7. N4IDA

    N4IDA Ham Member QRZ Page

    Thanks everyone. I did a real pitiful job on this post/question. I could have supplied more info.
    This zener is the bias zener for the Dentron 160-10.

  8. WA9SVD

    WA9SVD Ham Member QRZ Page

    Not a big help if he needs a 50 Watt Zener...:confused:

    Has the OP looked at Mouser? They may have an equivalent with a different part number. I suspect any 8.2 Volt, 50 Watt Zener would work; there is also a 60 Watt, 8.2 Volt version.
    Last edited: Jul 5, 2019
  9. K6CLS

    K6CLS Ham Member QRZ Page

    NTE is really great for new old parts. Check out for NTE5249A and others, their part number for 1N3307.
    AC0OB likes this.
  10. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    Quite right.

    But a string of regular rectifier diodes wired in reverse polarity so they use the Vf of the diodes to create a Zener effect works very well, is adjustable (add or remove rectifiers to add or subtract from the cathode bias by about 0.7V per diode), and very cheap. To hit 8.2V only takes about 10 rectifiers in series that cost $0.12/each and if rated for 3A per diode, will handle this just perfectly.

    If idling current is too high, add a diode; if it's too low, subtract a diode.:)
    N8VIL and WA9SVD like this.

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