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Reply to "Power Block max lengths.........."

@rtr12 posted:

Yes, your 10 track joints per block will be fine.  According to Barry's book, track blocks should not exceed 5 to 6 sections of track on each side of the DCS/power connection to the track. That's not word for word from the book but it's very close.

It goes on to say, Each track section counts as one section regardless of it's length. In any case track blocks should not exceed 100 feet in length.

Also, it sounds like the center of the block is what Barry is saying for your block connections.

Although Barry is no longer with us, the book (DCS Companion for TIU & Remote) is still available and is well worth the cost if you are running DCS. Lots of good information in there that is not in the DCS manual. There is also a Wifi version (maybe Wifi Companion, but I forget the exact title?) that covers DCS using the Wifi App.

Edit: What Royboy & Tom Tee say about having only one feed per block is also a very important rule to follow with DCS.

Re: "one feed per block": When a jumper is needed to assure center rail power past a switch or other break or unreliable connection, this rule has to be modified.  Understanding that some quantity of added bus wires, power jumpers or drops adds measurable capacitance to the circuit, it doesn't seem to cause signal problems done only where necessary to overcome the resistance of long sections of steel rail, or iffy connections.  Thinking about DCS wavelength and avoidance of partial signal cancellation, I make sure that jumpers are close to the same length as the parallel section of center rail, and bus wires that follow the block likewise are not much different in length, with short-as-practical power drops.

My longest blocks are in the range of 60 feet, with main feeds to the center of the bus wires, and many turnouts. I use Susan Deats' capacitor-resistor "filters" at each end of each block.

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