Recent content by MotoMike

  1. MotoMike

    Study of an unbalanced washing machine

    that is an idea I'd not considered as well. thanks.
  2. MotoMike

    Study of an unbalanced washing machine

    thanks all for the time, information and thoughtful discussion. The vibration and movements in addition to seeming more once elevated, with time seemed to get worse. This precipitated me replacing the 3 drum shock absorbers and setting the washer on feet made of sorbothane. At present going...
  3. MotoMike

    Study of an unbalanced washing machine

    the washer is a front loading type with axle of the drum going from the center of the front door to the back of the washer. the axle is close to horizontal. the pedestal is made for the washers and has a drawer in the bottom. the washer is firmly attached to the pedestal, essentially bolted...
  4. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    Thanks Balancore for that input. I had considered mounting them on opposite sides as you describe, but put them on one side hoping to create oil current up over the top cut out and down the other side to bottom cut out and up again. the thought that the 4 resistors be a steady force for flow...
  5. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    thanks Baluncore I will round up the parts to make the arrangement more clean and shortest possible runs while trying to leave enough space for cooling. I have some copper sheet 1/16 inch thick that I can use to make the connections. It appears I may have access to some high temp CE rated...
  6. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    the help here is much appreciated. the analyzer I spoke of did read the circuit and confirmed that there was about 305nh inductance seen at the input. I used a variable cap in parallel with the resistive network and found I could null out the inductance at about 100pf I the mid 28mhz range. it...
  7. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    Dave, I thanked you for your input and your advice on the parallel cap confirmed my thoughts. to say I did not want to follow your advice is assuming facts not entered into evidence. My desires are not the only thing that figures in the project. silly as that may sound. Thanks again.
  8. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    Tech99 thanks again. you're concern for the peak voltage is noted. You might be right on the PVC schedule 80 pipe. to say the hot resistors are mounted right on the plastic is not exactly true in that the mounting clips for the resistors are mounted on aluminum bars. my hope is that...
  9. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    Thanks for your help tech99. by saying that if I resonate with a shunt capacitor, then the resistance will go up. Do you mean to say the impedance will go up? my thought was that the resistance will remain constant and the reactive components in the circuit will change. If my problem is...
  10. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    Thanks for the help. The analyzer I have may be able to read the inductance of the resistors. I won't know till tomorrow when I return to the shop.
  11. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    Thanks for the help guys. I'm quite sure the resistors are not wire wound. I know that ceramic does not conduct, I think from looking at the construction that it is probably a doped mixture that has been fired. some quantity of carbon mixed with the slip to make 50 ohms. there is no evidence...
  12. MotoMike

    Home Brew RF dummy load showing reactance at higher frequencies

    Hi Dave thanks for getting back to me so quick. The resistors are not wire wound, but are ceramic. They are made for oil cooled dummy loads. My thought was that maybe making my connections with copper strapping as short as possible, rather than 12 ga stranded wire would reduce my...
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