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General Track circuit calculations
#1
PLEASE NOTE THERE IS A MORE UP TO DATE CALCUALTOR BELOW

There is often a lot of difficulty with the tack circuit calculation question. This is I suspect because people tend to over complicate it (it is after all not much more than a battery and a few resistors), although when you start to talk about "equivalent" circuits, students take on that look of "I should know something about those, shouldn't I".


.xls   TC.xls (Size: 19.5 KB / Downloads: 727)

The attached spreadsheet is not intended as a definitive calculator, it is there as an indication of how you might lay out the TC question (in this case to calculate the reed resistor) and break down the (relatively few) sums which are needed to arrive at the answer.

Fiddle with the numbers and see the sort of effect that it has on the other parameters (given that this is calculating the feed resistor, if you want to have a look at the effect of the Drop shunt of altering other things, change those values and fiddle the number for the drop shunt to get back to a feed resisance of 9ohms).

If you don't understand any of the sheet, please ask!
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Messages In This Thread
General Track circuit calculations - by Peter - 18-03-2008, 05:03 PM
RE: Track circuit calculation - by m.o - 07-04-2008, 01:52 PM
RE: Track circuit calculation - by Peter - 07-04-2008, 08:53 PM
RE: Track circuit calculation - by PJW - 08-04-2008, 06:11 PM
RE: Track circuit calculation - by Peter - 13-04-2008, 03:58 PM
RE: Track circuit calculation - by Peter - 13-05-2008, 06:09 PM
RE: Track circuit calculation - by BedfordBoy - 01-09-2008, 05:48 PM
RE: Track circuit calculation - by Peter - 01-09-2008, 07:57 PM
RE: Track circuit calculation - by PJW - 01-07-2009, 06:46 PM
RE: Track circuit calculation - by Peter - 01-07-2009, 10:12 PM
RE: Track circuit calculation - by priyman - 01-09-2009, 03:42 PM
RE: Track circuit calculation - by Peter - 01-09-2009, 08:23 PM
RE: Track circuit calculation - by jenni.joseph9 - 10-07-2010, 10:58 AM
RE: Track circuit calculation - by PJW - 10-07-2010, 11:28 AM
RE: General Track circuit calculations - by PJW - 28-08-2017, 08:53 AM
RE: General Track circuit calculations - by Peter - 02-09-2017, 11:20 AM
RE: General Track circuit calculations - by Peter - 09-09-2017, 10:19 PM
track circuit calculations - by Archie - 12-07-2010, 10:16 PM
RE: track circuit calculations - by Peter - 12-07-2010, 10:54 PM
RE: track circuit calculations - by PJW - 12-07-2010, 11:39 PM

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