I got curious and measured the capacitance of my (modest) layout which is about 12 by 14, 3 loops, and 7 sidings. It measures 2200pF from track outside rail to earth gnd. The
NJ layout must be 100 times that?
Dale,
You should have received a box from me with a cab-1 and a bad amp board for you to fiddle around with. Glad you did made it to the NJ Highrailers (somewhat large) layout!
It is something anyone who visits New Jersey must do and make a trip to see the monstrosity size of the beast of all layouts.
Ted, your package arrived safely. Thanks!
Interesting measurement chuck, sounds like to drive a really large layout you'd need a much lower impedance drive with lots of power.
Originally Posted by gunrunnerjohn:
Interesting measurement chuck, sounds like to drive a really large layout you'd need a much lower impedance drive with lots of power.
Yes. If it is like a hundred times that, the capacitive reactance would be down around 1 to 2 ohms at that frequency. Maybe 20 to 40 watts. Pretty wild guess.
Driving capacitance only takes VARS, not watts, but there would still need to be large currents.
Dale,it was great spending the day
with you on Saturday...I had a great time !
I hope we can do it again !
Bob Taylor
with you on Saturday...I had a great time !
I hope we can do it again !
Bob Taylor
Bob, I really liked your compact layout, but the Ford flatbed was a close second!! It was a pleasure to meet you lovely family, too.
Originally Posted by Dale Manquen:
Driving capacitance only takes VARS, not watts, but there would still need to be large currents.
It'll still take some power to push into that capacitance at 455khz.
