Nov 24, 2006 #1 A amriths04 Full Member level 5 Joined Jul 15, 2006 Messages 263 Helped 23 Reputation 46 Reaction score 9 Trophy points 1,298 Activity points 2,819 hi friends, when we turn the screw of a trimmer capacitor, how do we know its capacitance at that point? thank you, amrith.s
hi friends, when we turn the screw of a trimmer capacitor, how do we know its capacitance at that point? thank you, amrith.s
Nov 24, 2006 #2 A ahmed_nasr Member level 3 Joined Sep 19, 2006 Messages 59 Helped 11 Reputation 22 Reaction score 1 Trophy points 1,288 Activity points 1,694 i think this can be done by knowing the ratio of the rotation to the full rotation ... this is an approximate method
i think this can be done by knowing the ratio of the rotation to the full rotation ... this is an approximate method
Nov 24, 2006 #3 A amriths04 Full Member level 5 Joined Jul 15, 2006 Messages 263 Helped 23 Reputation 46 Reaction score 9 Trophy points 1,298 Activity points 2,819 but do you think it will be a linear relationship? thank you, amrith.s ahmed_nasr said: i think this can be done by knowing the ratio of the rotation to the full rotation ... this is an approximate method Click to expand...
but do you think it will be a linear relationship? thank you, amrith.s ahmed_nasr said: i think this can be done by knowing the ratio of the rotation to the full rotation ... this is an approximate method Click to expand...
Nov 24, 2006 #4 A ahmed_nasr Member level 3 Joined Sep 19, 2006 Messages 59 Helped 11 Reputation 22 Reaction score 1 Trophy points 1,288 Activity points 1,694 yes i think it's linear because C=εA/d and A= overlapped area = 0.5*Φ*(r^2) where Φ=overlap angle i.e C is directly proportional to Φ i.e linear relation between C and Φ
yes i think it's linear because C=εA/d and A= overlapped area = 0.5*Φ*(r^2) where Φ=overlap angle i.e C is directly proportional to Φ i.e linear relation between C and Φ
Nov 24, 2006 #5 A amriths04 Full Member level 5 Joined Jul 15, 2006 Messages 263 Helped 23 Reputation 46 Reaction score 9 Trophy points 1,298 Activity points 2,819 oh ok. thank you, ahmed_nasr. amrith.s ahmed_nasr said: yes i think it's linear because C=εA/d and A= overlapped area = 0.5*Φ*(r^2) where Φ=overlap angle i.e C is directly proportional to Φ i.e linear relation between C and Φ Click to expand...
oh ok. thank you, ahmed_nasr. amrith.s ahmed_nasr said: yes i think it's linear because C=εA/d and A= overlapped area = 0.5*Φ*(r^2) where Φ=overlap angle i.e C is directly proportional to Φ i.e linear relation between C and Φ Click to expand...
Nov 24, 2006 #6 A ahmed_nasr Member level 3 Joined Sep 19, 2006 Messages 59 Helped 11 Reputation 22 Reaction score 1 Trophy points 1,288 Activity points 1,694 u r welcome ... plz click on " helped me" button if that was helpful
Nov 25, 2006 #7 E echo47 Advanced Member level 6 Joined Apr 7, 2002 Messages 3,933 Helped 638 Reputation 1,274 Reaction score 90 Trophy points 1,328 Location USA Activity points 33,176 If it's a compression trimmer, the relationship is non-linear. In case you've never seen one: http://www.spraguegoodman.com/500/500p1.html I measured an Arco 402, turning the screw approximately 30 degrees per measurement:
If it's a compression trimmer, the relationship is non-linear. In case you've never seen one: http://www.spraguegoodman.com/500/500p1.html I measured an Arco 402, turning the screw approximately 30 degrees per measurement: