811A Tube Amp. Schematic

Discussion in 'Electronic Design' started by rijo1, Feb 14, 2005.

  1. rijo1

    rijo1 Guest

    Hi group , I want to build a 10 - 40 meter linear amp. using 811A tubes
    .. I am looking for schematics for this project and am in high hopes
    someone here can direct me to a web site where I can download the
    schematics . It would be great if someone had the schematics and would
    be willing to email them to me . All or any information for my 811A
    linear amp. project is very much appreciated . Thanks in advance , Rick
    rijo1, Feb 14, 2005
    #1
  2. rijo1

    Tim Wescott Guest

    Luhan Monat wrote:

    > rijo1 wrote:
    >
    >> Hi group , I want to build a 10 - 40 meter linear amp. using 811A tubes
    >> . I am looking for schematics for this project and am in high hopes
    >> someone here can direct me to a web site where I can download the
    >> schematics . It would be great if someone had the schematics and would
    >> be willing to email them to me . All or any information for my 811A
    >> linear amp. project is very much appreciated . Thanks in advance , Rick
    >>

    >
    > Those tubes may be worth more than the cost of a new linear amp. Last
    > time I saw a circuit for anything like that was the 1953 edition of the
    > Radio Amateur's Handbook.
    >

    Nope. The Ameritron AL-811 lists for $800 and contains 4 811A triodes
    which go for between $13 each (Chinese) to $50 each (NOS American)? You
    _can_ still build some things for less than the sum of the parts if
    you're clever.

    http://www.tubesandmore.com/
    http://www.ameritron.com/goodies/catalog/amer2002.pdf

    Too bad QRO makes me gag.

    --

    Tim Wescott
    Wescott Design Services
    http://www.wescottdesign.com
    Tim Wescott, Feb 14, 2005
    #2
  3. rijo1

    Luhan Monat Guest

    rijo1 wrote:

    > Hi group , I want to build a 10 - 40 meter linear amp. using 811A tubes
    > . I am looking for schematics for this project and am in high hopes
    > someone here can direct me to a web site where I can download the
    > schematics . It would be great if someone had the schematics and would
    > be willing to email them to me . All or any information for my 811A
    > linear amp. project is very much appreciated . Thanks in advance , Rick
    >


    Those tubes may be worth more than the cost of a new linear amp. Last
    time I saw a circuit for anything like that was the 1953 edition of the
    Radio Amateur's Handbook.

    --
    Luhan Monat (luhanis 'at' yahoo 'dot' com)
    "The future is not what it used to be..."
    http://members.cox.net/berniekm
    Luhan Monat, Feb 14, 2005
    #3
  4. Luhan Monat () writes:
    > rijo1 wrote:
    >
    >> Hi group , I want to build a 10 - 40 meter linear amp. using 811A tubes
    >> . I am looking for schematics for this project and am in high hopes
    >> someone here can direct me to a web site where I can download the
    >> schematics . It would be great if someone had the schematics and would
    >> be willing to email them to me . All or any information for my 811A
    >> linear amp. project is very much appreciated . Thanks in advance , Rick
    >>

    >
    > Those tubes may be worth more than the cost of a new linear amp. Last
    > time I saw a circuit for anything like that was the 1953 edition of the
    > Radio Amateur's Handbook.
    >

    NO, you don't have to go that far back to find construction articles
    that use them.

    And of course, old books and magazines are the place to look for them.
    One should not limit themselves to "the web".

    I'm still puzzling over the "40 to 10 meters". Very few would go to
    the trouble of making such an amplifier and leave out 80 meters.
    On the other hand, I thought the term was often used as code,
    to sell amplifiers intended for illegal use on CB, but without
    coming right out and saying it was for illegal CB use.
    Especially when a library just may have a book that carries
    such a project for ham use, and there is a whole slew of newsgroups
    for amateur radio which seems to be the place to ask if the question
    is legit.

    Michael
    Michael Black, Feb 14, 2005
    #4

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