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This is a technical  problem and it is hard to accept this matter and if anyone is interested; i will post a photo of the area and a circuit diagram. Two different problems are involved and so is AC current on MTS.I am doing some block wiring and isolating various sections of my railway prior to connecting up an LGB detection module. This involves putting in two isolated sections 3 m long on the blue rail trailing sides of switch S10l. The direct trail goes on around the circuit in area 2 and the divert side goes via about 8 m track to a reversing loop module in area 1. I am using a supplementary switch on S10 to do the switching of power and the isolating.On direct i have 21V AC on facing, same on direct trailing and 1.6 V on the divert side.On divert i have 0V on direct trailing, 14 V on divert and 14 V on facing! Why the big voltage drop and why the 1.6 V on divert, it should have been zero?By sheer luck i found a high resistance soldered joint about 10 m away on the facing side blue rail and when i fixed that i fixed the voltage drop, i suspect i have always had this problem and didn't know it and the isolating and the 1.5 V problem made it stand out and detectable. I am still concerned about the 1.5 V as i believe it will affect the detection modules performance; in that it will think it has a loco in it all the time.I have two Hillman insulating clamps on the blue side one at the switch and also at the other 3 m mark. I measured the resistance of each one in situ and i got about 2.4 k ohms each so, this is ok. I removed all clamps and so i now have a piece of track completely isolated at one end and only connected to the other part of the track on the red rail side. I get 1.6 V across the far section and 2 V across the near section. The far section is connected to the reversing loop which should have no power to it at all.If anyone told me about something like this i wouldnt have believed them You just can't have a piece of isolated track with 2 V on it, yet i have!So i came up with the idea that if it could not be electrical, it might be electro magnetic.This piece of track has been down for about 4 months and if i did not do this exercise, i might never have known. How is it different to the rest of my layout well my wife came up with the idea that the only thing we have done that is different, is we have used some granite chips we had left over, as ballast under the fines. I see granite does have ferrite pyrites in it.I also have a 20 V AC wire running right along side this track to run switches and signals, so i thought it might be forming a giant transformer and i am getting an induced voltage, so I disconnected the AC at the transformer and it had a significant drop say down to 1.1 V but it was still there. So some induction is occuring and the only thought that i have is that DCC signal from the central station was somehow inducing itself from one leg to the other a bit like a radio transmitter and reciever. When i disconnect the MTS att the central station it foes.Any ideas?Hopefully IanRgds ian
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