How I Tune Up My Amplifier

Discussion in 'Amateur Radio News' started by KM9G, Jul 7, 2021.

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  1. KA4DPO

    KA4DPO Platinum Subscriber Platinum Subscriber QRZ Page

    I'm not crazy about the MFJ dummy load, I much prefer my old cantenna. I know it's primitive, but the oil cooled resistor can take power longer than the MFJ, and doesn't change value as temperature increases. It will let you tune an 811H at full power without breaking a sweat. I also like my old Drake power meter, but mostly I pay attention to the grid current when tuning.
    KM9G likes this.
  2. VA3AQB

    VA3AQB Premium Subscriber QRZ Page

    Maybe for a new ham low power and is still learning, this AL811 is a good amp for a new guy who can make mistakes and tubes are cheap. Tuning with low power is not a good practice. I think the first tune step should be taken out and go with the second step on 25% if not confident yet.
    If I was a new ham this video I would love to come across to help me with my new amp. Good job
  3. NN2X

    NN2X Ham Member QRZ Page

    I was taught this way as well..

    NN2X Tom

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