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  1. P

    Unstable voltage President Grant XL

    So I got the driver and final swapped out, ran into an issue where I had to trace down a blown diode, seemed like it was averaging 7-8 watts at first, peaking at 25, then when I brought it out to test it in the truck it peaked at 25 on a 3 count and was avg 1-2 watts, then it just turned off...
  2. P

    Unstable voltage President Grant XL

    Might I have damaged the radio by doing this? The receive seems to waver in and out now, it did not do that before.
  3. P

    Unstable voltage President Grant XL

    Thanks NZ8N! Yea, not sure if there is something else wrong with this radio, it does exactly the same watts max when it had a MRF477 (9 or so) in it (Driver is still C2166). I have more ERF2030+ but hoping I didn't damage this one - waiting for the correct parts to get in and I'll try to swap...
  4. P

    Unstable voltage President Grant XL

    Grounded it to the negative pin of the powersupply and it sems to be showing a steady ground. Previously was grounding it to the chassis. Strange how this works in the truck but not on a power supply.
  5. P

    Unstable voltage President Grant XL

    It's something to do with the power supply - in the truck it shows a stable gate voltage.
  6. P

    Unstable voltage President Grant XL

    Hello, New to this arena and just trying to learn! I am working on a grant that I bought on ebay, was trying to change the final to an ERF-2030+ because the output on their mod (MRF477) was only 9 watts peak, no matter what. Now with the ERF-2030+ it's only 6 watts peak. I was following...
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