Germanium diodes

Discussion in 'Wireless & RF Design' started by samuel.whiskers, May 14, 2014.

  1. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
    95
    2
    Hi all
    I'm looking at experimenting in radio circuits (crystal/powered receivers/transmitters), mostly out of interest.... I note many varied uses of germanium diodes - is there any particular ones I should get hold of before I start? Help me spend some money on ebay! :)
    cheers
    Lee
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    The most popular, inexpensive, readily available is 1N34A.
     
  3. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
    95
    2
    Thanks - just looking down an ebay listing, there seems to be several others - is there any reason to get a few different types? Will others offer any advantages, or learning points??
     
  4. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    Not really, not for a Ge signal diode.
     
  5. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
  6. #12

    Expert

    Nov 30, 2010
    16,343
    6,828
    I made that mistake a few times. No reason to buy an assortment unless it's the kind of circuit where you might blow up the part. A germanium diode in a crystal radio circuit is pretty safe.
     
  7. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    there was a comparison of germanium diodes made a while back on a crystal radio page, but that page got hit by hackers and died. there is an actual difference between diodes used in crystal radis, but the 1n34 was one of the best, and the only ones that beat it were expensive rare special purpose diodes. some like shotkey diodes with a little bias added.
     
  8. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
  9. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,348
  10. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
    95
    2
    Thanks for the advice/links.....
    I grabbed a pack of 1N34A's, and a few other types while I was at it, can't hurt to have a few in the parts box! :)
     
Loading...