5 watt amplifier kit

Discussion in 'The Low Bands - 630/2200 Meters - VLF' started by AE5X, Oct 8, 2019.

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  1. AE5X

    AE5X Ham Member QRZ Page

    KK4CUL likes this.
  2. WQ2H

    WQ2H QRZ Lifetime Member #214 Platinum Subscriber Life Member QRZ Page

    John - thanks for sharing this post, I've had a complete QRP labs set up w/2200 & 630 LPFs that I simply haven't had time to even start ! :eek:

    Don't know what kind of an antenna you have, but I can take a photo of my load coil / match xfrm used with my 40' vert w/ 100' hat if needed. Seems to work reasonably well for 475.

    In any event, I'll be listening.

    73
    Jim, WQ2H / WK2XAH
     
  3. AE5X

    AE5X Ham Member QRZ Page

    Hi Jim,

    The antenna will be my 80m dipole fed as a top-loaded vertical. It is about 100 feet tall and will have a coil at the feedpoint consisting of about 30 turns on a 5-gallon bucket. I take it down during the summer thunderstorm season - it will go back up this weekend. It makes a decent tx antenna but is noisy on rx so I'll be experimenting with a loop soon.

    73 - John AE5X
     
  4. WQ2H

    WQ2H QRZ Lifetime Member #214 Platinum Subscriber Life Member QRZ Page

    Nice - sounds good. I use about 150uH with my short Marconi (and the match torroid is biased about 6/26 toward ground). I'm guessing 30 turns of 14AWG on a bucket would probably be twice that.

    Tis' the season for MF/LF, so enjoy !!


     

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