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PGXL Temperature Rise

Ken D'Alessandro
Ken D'Alessandro Member ✭✭
in Power Genius XL Amplifier

I lately noticed that when I turn on my PGXL and put it into OPERATE mode the PA heatsink temperature rises to between 50-52˚ when just idling. I have not transmitted since turning it on. The current draw is about 4A. When I put it in STANDBY the temperature drops to about 45˚ after a few minutes. The harmonic load temperature stays at about 29˚ or so and rises slightly when transmitting. If I place the amp back into OPERATE mode, the temperature steadily rises again to over 50˚ while idling without transmitting. This does not appear to be normal behavior. I think I recall lower idling temperatures in the past.

Can anyone comment about this?

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Comments

  • bahillen
    bahillen Member ✭✭✭

    Open a help desk ticket.

  • David Decoons, wo2x
    David Decoons, wo2x Member, Super Elmer Moderator

    What speed are the fans in?

    Whay version firmware?

    Dave wo2x

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    You'll find the temperature rises based on the BIAS current.

    I ran RTTY all weekend at 700 watts and never got over 50C, but I am on the latest version.

    We have done a lot of work on the firmware/fans and Bias, so the version is critical.

  • Ken D'Alessandro
    Ken D'Alessandro Member ✭✭

    Firmware version is 3.8.4

  • David Decoons, wo2x
    David Decoons, wo2x Member, Super Elmer Moderator

    Try upgrading to 3.8.8

    Dave wo2x

  • Bill NE1B
    Bill NE1B Member ✭✭✭

    Thanks Dave, 3.8.8 seems to have improved the cooling with the fan cycles. Now the next feature I wish for…is Auto-Standby, after x hours of inactivity. With x being a setable value like 2,4,6 hours.

    73, Bill

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