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    Flex series 6000/8000 power supply over voltage setting

    Member ✭✭
    in SmartSDR for Windows

    Is there a suggested value of over voltage to which a power supply should be set?

    Tom

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    Best Answer

    • Member ✭✭
      Answer ✓

      Thanks for all comments OMs,

      I will set my over voltage limit to about 15.5 V.

      Tom

    Answers

    • Member ✭✭✭
      edited September 2024

      Suggest 15v…it is within the Flex documented range…details on my web page.

      http://nn4zz.com/Flex6600.htm#Astron_Power_Supply

      http://nn4zz.com/Flex6600.htm#Astron_Power_Supply

      Al / NN4ZZ

    • Member ✭✭✭✭
      edited September 2024

      Have used 14 volts almost daily for 6.5 years without issue.

    • Member ✭✭✭✭

      use one of the flex volt meter apps to find a setting that keeps the voltage above 12.9 on transmit.

    • Member ✭✭✭

      @John KB4DU - do you have a link to “one of the flex volt meter apps?” My quick search on this community and Google did not come up with anything that might be able to keep the voltage up on transmit. Thank you sir! 🤝

    • Member ✭✭✭✭

      Look at FRStack at https://www.mkcmsoftware.com/Flex/Index

      or my favorites, K9DUR's Smart Utilities, He has several very well written FLEX APPS at https://www.mkcmsoftware.com/Flex/Index

    • Member ✭✭

      Perhaps I did not expressed my question clearly. I am in the process of installing a new power supply.

      I can set the over voltage value at which "crow bar" is activated and and the radio is protected from an excessive power supply output. My question is what is the highest safe voltage the radio can withstand safely.

      Do Flex provide this information?

    • Member, Super Elmer Moderator

      13.8 VDC +-15%. That comes out to 15.87 V. I would set it to 15 or 16 V for overvoltage protection. I have my supply set to 14.2 V to account for ohmic losses in cables, connectors and fuses.

    • Member ✭✭✭

      Been running my 6700, 24/7, since February 2018 at 14.5V with a 35A PS. Very short cables, appr. 20cm for minimum voltage drop. Never had a problem.

    • Member, Super Elmer Moderator

      measure the voltage at the PA in the radio using one of the software tools mentioned. Do this at TUNE set to 100 watts then press Tune button to see voltage drop.

      I run my supply at 14.8 volts on no load so if it had crowbar protection I would probably set it to 15.1

      73

      Dave wo2x

    • Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

      My 6600 kept dropping to 12.5 on 100W full carrier.

      I cleaned the power poles, and added some DeOxit (there are many versions of this). Now, I only see a 0.1V drop with the same test.

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