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TNCS Condition

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Perhaps you can shed some light on this condition for TNCS systems in the Irish Rules. I can only see that as RE decreases RB becomes more onerous but to be honest I am not really getting the essence.
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  • I did the sums using RB=20 and RE=100


    Then I decided that the other side of the equation always stays the same, so RB/RE has to greater than or equal to 0.2631ohms, so if RB is 20 ohms RE cannot be more than 5.26 ohms.


    Then again perhaps I should not do sums and maths in public. 


    Andy B 

    4b60e38bbc0d2ff3e0ec6334cba0c44f-huge-20200329_172712.jpg

Reply
  • I did the sums using RB=20 and RE=100


    Then I decided that the other side of the equation always stays the same, so RB/RE has to greater than or equal to 0.2631ohms, so if RB is 20 ohms RE cannot be more than 5.26 ohms.


    Then again perhaps I should not do sums and maths in public. 


    Andy B 

    4b60e38bbc0d2ff3e0ec6334cba0c44f-huge-20200329_172712.jpg

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