Tapiolan srk:n pienoisrautatiekerho

Trackplan, freely, not to scale

[IMG_3148.jpg] General view of the stand, unfortunately the photo is shaken

[IMG_3149.jpg] In front modules by Johannis Likos, apparenly part of which were for Marklin. No trains were seen in motion here.

[IMG_3150.jpg] Kauniainen by Tapiola parish MRC. Now Team Tyyskä in charge.

[IMG_3151.jpg] FREMO-track started from Kauniainen AGA-spur extension and went clockwise around the whole 10 x 10 metre stand.

[IMG_3152.jpg] Here sceniced FREMO modules by Kari Hovinmaa

[IMG_3153.jpg] Here sceniced FREMO modules by Kari Hovinmaa

[IMG_3154.jpg] FREMO modules by Kari Hovinmaa

[IMG_3155.jpg] FREMO modules by Kari Hovinmaa

[IMG_3156.jpg] FREMO module by Juuso Painio

[IMG_3157.jpg] Helsinki MRC built this small station in a hurry....

[IMG_3158.jpg] ... but due to teechnical problems it was only used as a line

[IMG_3159.jpg] Here some more Kari Hovinmaa's curve modules (r=1000mm)...

[IMG_3160.jpg] Iiro Niemi's FREMO-module is always as stunning...

[IMG_3161.jpg] Iiro Niemi is building this field scene. In front his FREMO construction demo...

[IMG_3162.jpg] Iiro Niemi's FREMO demo...

[IMG_3163.jpg] ...

[IMG_3164.jpg] Juha and Juuso Painio's Lapinlahti (Father ;amp; son project)

[IMG_3165.jpg] Lapinlahti station building (cast model and cardboard mockup)

[IMG_3166.jpg] Northern finland Rail Enthuisasts (PoRha) member Markku Pulkkinen has built this intersting spur module

[IMG_3167.jpg] ...

[IMG_3168.jpg] PoRha member Jorma Ketola has built these unfinished corner modules...

[IMG_3169.jpg] ...

[IMG_3170.jpg] FREMO module by Juha Telimaan...

[IMG_3171.jpg] ... where one poor soul continuously dragged loads from the good wagon

[IMG_3172.jpg] Juha Telimaa's module had a post office from the days when Itella still dared to show post in it's name...

[IMG_3173.jpg] ...

[IMG_3174.jpg] Juha and Juuso Painios new module, where a Faller Car Sysytem lorry was playing dangerous game with trains...

[IMG_3175.jpg] Tapiola parish MRC FREMO station. Cardboard covered the openings that are to be filled with scenery.

[IMG_3176.jpg] ...

[IMG_3177.jpg] Two hours before the exhibition closed the throwbar of one Tillig turnout broke --a common problem with Tillig Elite turnouts...

[IMG_3178.jpg] Trains could not go further...

[IMG_3179.jpg] Modules by Johannis Likos...

[IMG_3181.jpg] The return loop had Märklin-trackwork...

[IMG_3183.jpg] Kauinianen fiddle yard. Olli K-R kept a record of used DCC decoder addresses. Still some had to try their locos without consulting the list!

[IMG_3185.jpg] Alpine layout -- weöll it leaves speechless...

[IMG_3188.jpg] "Aerial view" of our stand...

[IMG_3191.jpg] ...

[IMG_3196.jpg] ...

[IMG_3197.jpg] Toijala Loco Museum...

[IMG_3198.jpg] Kouvola Model Railway Museum...

[IMG_3203.jpg] Märklin-loop...

[IMG_3204.jpg] AGA industrial plant near Kauniainen --here in N-scale NCI-module...

[IMG_3206.jpg] Rolling stock by Juha Telimaa...

[IMG_3213.jpg] Turku Rail Enthusiasts Club...

[IMG_3214.jpg] ...

[IMG_3215.jpg] Kari Saalasti and "a piece of cake" diorama...

[IMG_3216.jpg] Heikki Kannosto got a stuffed fox...

[IMG_3217.jpg] Juha Telimaa wondering what's wrong with Tapiola's DCC...

A.Louko's memory scope pictures of our DCC-system

[tek00001.png] Random measurements of a rail voltage (ground is booster H-bridge input ground)

[tek00003.png] Regular spikes on DCC-signal (13 us interval)...

[tek00004.png] Close-up of zero-crossing...

[tek00005.png] Shortr sircuit. Oddly enough it seems like other rail is grounded although there is no ground as such ...

[tek00006.png] Short circuit. These noise spikes cross zero so they may cause errors in cecoders...

[tek00007.png] ...

[tek00008.png] In the middle of the FREMO loop (station in the middle)...

[tek00009.png] close-up...

[tek00010.png] ... and even closer. The red signal is the difference between running rails (blue,yellow). The red signal is the one decoder sees and senses. Oscillation here is in common mode, and not visible to decoder.

[tek00011.png] Short circuit within FREMO loop...

[tek00015.png] Oscillations...

[tek00016.png] PC-eliminator signal wire. 50 Hz noise clearly visible (non-terminated line!), as well as reduction in voltage (should be 5 volts)...

[tek00022.png] Here is a packet from controller within PC-Eliminator bus. There are small spikes between (Mancester coded) bits, these are possibly due to software error...

[tek00025.png] Close-up on error (I briefly release the O/C driver of the line in my wired throttles between bits, but this does not explain the spikes upward while the signal is high!)...