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yaesu 9800R knock off amperage draw is high

Discussion in 'General Technical Questions and Answers' started by KC1CBR, Sep 7, 2020.

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  1. KC1CBR

    KC1CBR Ham Member QRZ Page

    Morning all,

    i have a unique issue and im casting my line for advice.

    Background:
    i picked up a yaesu 9800R quad band knock off from amazon.
    i have a smaller power meter hooked up to monitor output power and i have a meter on the power feeding the radio to watch the voltage and amperage.
    the radio is being fed from a 30A dc switching power supply, mounted on a shelf directly under the radio.
    The Problem:
    occasionally when transmitting on the higher power settings, the output power looks normal, but the amperage rises quickly.
    For the most part it will hover at the 6-8 amp mark during transmission.
    every once in a while while transmitting, the output power will remain constant, but all of a sudden the current will spike up to 25A-30A and the power supply will go into an over current shut down.


    has anyone experienced this before? am i dealing with some sort of feedback loop with everything being in such close proximity? i had thought maybe my instrumentation was faulty, but i cant ignore the fact the supply shuts down..

    thoughts?
     

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