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linear amplifier

Discussion in 'Datasheets, Manuals and Component Identification' started by simplelogic, Jan 5, 2010.

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  1. simplelogic

    simplelogic

    2
    0
    Jan 5, 2010
    hello everyone..thanks a lot for this site..finally I can ask from the experts without need of paying them.

    pls. help me modify my LA -2080 (daiwa) so that it could have a higher output...
     
  2. davenn

    davenn Moderator

    13,596
    1,875
    Sep 5, 2009
    doing a search on google tells me that this is a 144MHz 80W output amplifier
    with a 1-4W drive from a handheld tranceiver.

    are you getting 80W out with 4W of drive ? if so then thats all you are going to get
    without killing it .... if you want more power, then buy a bigger amplifier !!! :)

    the amplifier has 2 transistors in it a 2SC1946 driver with ~ 4 W in gives ~ 28W out
    and the Final which is a 2SC2694 which is rated at ~ 75 W out with 28W of drive

    increasing output... even if it was possible ... to 100W is NOT going to give you any
    significant signal strength at some one's receiver
    REMEMBER to increase one "S" point on an S meter you require a 6dB increase in
    power .... 6dB is 4 times the power level ie. in your case you would have to go from
    80 Watts to 320 Watts of power output......
    as I said earlier you need to buy a bigger amp to make a significant difference to someone's S meter

    Dave
    VK2TDN
     
  3. simplelogic

    simplelogic

    2
    0
    Jan 5, 2010
    thnks for the info..but can I change the Final or drive alone in order to have a higher output without changing or adding some parts...? or is it possible to have a higher output without changing the final or drive but I should add/change some parts or ceramics...?
     
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