3CX3000 Amp

Discussion in 'Amateur Radio Amplifiers' started by 9A3KEK, May 11, 2011.

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  1. 9A3KEK

    9A3KEK Ham Member QRZ Page

  2. 9A3KEK

    9A3KEK Ham Member QRZ Page

    Finally, thread got approved by admins.
  3. KU3X

    KU3X Ham Member QRZ Page

    Why not Pi-L ?
  4. W9GB

    W9GB Ham Member QRZ Page

    As I remember, Croatia / Hrvatska and other countries this southeastern European region permit
    higher wattage amplifiers for amateur radio service.
    I remember seeing a 7.5 kW surplus Russian military HF amplifier design, a couple of years ago, for a club contest station in that region.

    IF I am reading the schematic correctly, you are using a 3 Phase 400 VAC primary for the plate transformer?
    Where is blower / fan in the schematic (I may have missed it) and what is the CFM rating on that blower/fan unit?

    I will left Tom, W8JI comment on proper metering :)

    Ken, W2DTC has construction notes and digital photos of the THREE different DIY Build
    HF amplifiers he has built using that same 3CX3000F7 RF tube.

    For one, he used a Gates/Harris broadcast transmitter for his enclosure/cabinet as well as some key parts
    (photo below, black cabinet is HV power supply).


    Last edited: May 14, 2011
  5. 9A3KEK

    9A3KEK Ham Member QRZ Page

    I am using 3 phase because i have it in my home and its better for heavier loads, blower is in the lower left corner marked as M(about 400 CFM).

    I got the idea from W2DTCs website.
  6. 9A3KEK

    9A3KEK Ham Member QRZ Page

    It seems mods have to approve my posts, so I cant post often. I dont have callsign(Im in process of getting one) so I registered with my nickname from video games.

    I ask mods can they lift that restriction so I can reply to this thread.
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