• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Low value fuse DCR concerns

I am repairing a tube amp & there are fuses in the bias ckts. for the power tubes. (KT88s) The fuses (125mA) that survived the failure measure 3.4 ohms & new fuses measure 6.6 ohms. BTW I measured the fuses with a 22 ohm resistor in series. I don't have instructions for adjusting bias on this unit & am concerned about replacing some fuses with these new ones. I didn't notice, when I ordered the fuses but, is the DC resistance in the spec? So, should I be concerned about this variance (3.2 ohms) in the new fuses?
Thanks,