John ks

The following posts include pictures of the RDB977527 John

The top left corner shows the 2 wires that need to be swapped at the point motor(what jpendle said as an image) The physical orientation of the point motor can determine if the frog polarity is correct Assuming that DCC red & black wires to the seeps go to the red & black buses respectively In the slips shown below if the top one switches the frogs correctly then the RH frog on the lower slip will be incorrect The lower LH seep is orientated 180deg compared with the top LH seep To fix this the red & black wires to that seep would need to be reversed I hope this explanation will give you an insight as to why you went wrong John

If the short happens when you go from the plain board to the scenic section (the place where the loco is shown) then the wires marked "power bus bar" may the be wrong phasing (DCC for polarity)** Try unplugging the seeps on the plain board & running the loco across the points (it may stall at the frog, push it through the point until it runs again If there is no short then the phasing of the plain section may be incorrect (as previously mentioned) If there is a short then 43110andyb might be correct **You can check the phasing by testing for voltage between A-A Full volts indicates correct phasing , no volts indicates incorrect phasing B-B Full volts indicates correct phasing , no volts indicates incorrect phasing C-C No volts indicates correct phasing , Full volts indicates incorrect phasing D-D No volts indicates correct phasing , Full volts indicates incorrect phasing John

Schooner As shown the cobalt's wont work If you want to use the Gaugemaster to power the Cobalt's the the point lever will have to be wired as a DPDT switch (if the point doesn't move when the lever is thrown then chance the wires to terminals 4 & 5 on the lever IE black to 4 & red to 5. 8 & 9 remain as shown) OR You can get a Cobalt CDU2 power supply & wire as shown Quote from DCC concepts 2 posts down The CDU2 is totally unsuitable for operation with an analogue slow action point motor. It is a capacitor discharge unit and designed for use with solenoid motors and will damage the Analog IP (You may be thinking about the PSU2 - which is a +9v/0v/-9v unit - however - no longer available and replaced with the SPS12 unit as a split voltage supply.) Regarding the crossing gates . I've only looked at their webpage & I think you will need to wire the servo something like shown John

Tell him he's dreamin John

If the RD in the number stands for Research Department then that should be a bit of a give away If i understand correctly it was used as a research vehicle as part of the development of the MK4 coach The mark 4 coach was going to be tilt-able. There was provision between the floor & the bogie for a tilt mechanism to be retrofitted I Believe all the above to be correct but if i have made any errors then i am sure someone will correct me John

My understand of APT Fan comment was that the components (hardware) cost less than £20.00 The brains of a Decoder is the PIC chip & these can cost only a few Pounds when bought singularly The rest of the components on the decoder should only cost a few more Pounds When bought in bulk the component cost drops I think APT is being generous with the £20.00 price tag The next cost to make a decoder is the software & I don't know enough to comment on that John

I tend to use imperial when referring to Gauge, in Queensland the gauge is 3' 6" & standard gauge will for me always be 4' 8½" Here in Oz we went metric in 66 & The 1c & 2c coins were deleted in 89 & 90 LSD become $ & c £1 become $2 Notes were $20, $10, $2 & $1 The $5 note arrived in 67 followed by a $50 in 73 & a $100 in 84 Coins were 1c,2c,5c,10c,20c & 50c The $1 & $2 notes were replaced with coins in 84 & 88 For cash purchases the rounding is as follows (there is no rounding on card purchases) 1c & 2c are rounded to 0c 3c & 4c are rounded to 5c 6c & 7c are rounded to 5C 8c & 9c are rounded to 10c The rounding applies to the total purchase The first polymer note produced was the $10.00 note & they look like this John

If I remember correctly Pounds, Shillings & Pence was abbreviated as LSD John

I not sure that this has already been suggested or tried Remove the brown wire as shown in the picture, this should disconnect the motor from the circuit Put the loco on the track & test it The motor should not run & the lights should work as expected if the lights do not work as expected then there is a problem with the lights If the work OK then reconnect the motor & try again If the results are the same as the original post then as Pete suggests it could be some sort of back EMF problem or possibly dirty track In the last week i have just installed DCC to one of these HST's & when I removed the capacitor I saw that it was held in place by doubling its leads & squashing them against the brush retainers. after time these may become loose before replacing the capacitor try squeezing the leads against the brush retainer John

Goto to the video at about 5m50s My Irish is a little rusty but I think Fran says Q3 2021 Unless there's been a more recent update John

The story i heard goes something like this Q what holds the earth up A an elephant Q what is the Elephant standing on A A turtle Q what is the Turtle standing on A another Turtle Q what's that Turtle standing on A It's Turtles all the way down I've been wondering about that acceleration I found a velocity calculator on line & it gave the following results If the flat earth is accelerating at 9.8 m/s squared then from rest it will be traveling at 3,048,190km/h after 24 hr or 1,112,590,000 km/h after a year (which is about 1.03c where c is the c from e=mc squared) Your velocity will reach about 1,079,000,000km/h after 354 days which happens to be the speed of light My understanding is the max speed possible is the speed of light & as an object speed increases it length decreases So Logically speaking if the earth started as a ball & was accelerating at 9.m/s sq then its length (diameter in the direction of travel) would decrease to 0 as it approached light speed after 354days the earth would truley be flat OH Damm !!!!!!! I think I just proved the earth is flat Sorry John

John

Edit I didn't notice this is in the DC section The label "DCC bus " should be replaced with From DC Controller This diagram will work with DCC & DC as is If i understand correctly then this is what been suggested but as a drawing In the top image the frog is switched by the point blades as it was straight out of the box in the lower image the frog is switched by a switch which can be part of the point motor or a switch mechanically interlocked to the point blade Edit only applies to DCC (the switch could be replaced with a frog juicer) The point blades are always alive & there is no reliance on the point blade contact Hope this helps John

It would be interesting to see a close up of Digitrax decoder with the blue heat shrink removed It might be possible to determine which part of the decoder failed & narrow down why it failed John

I have had this problem on an Athearn loco. the track + wire was bridging to the motor + on the motherboard (these 2 connections are joined on the DCC blanking plug so this fault will only become apparent on DCC) With the blanking plug installed the loco ran fine on DC, when I fitter a decoder it ran ok in one direction but the magic smoke was released in the other direction Have you tried the decoders in a decoder tester or another loco John

I had what sounds like a similar problem & fixed it by removing the suppression capacitors & inductor next to the motor John

Swoopy chicken at rest John

A few questions What scale are the points? Are you using separate Track bus & accessory busses? If so then the frog wiring should come from the track bus not the accessory bus If OO peco have you cut the links under the rails from the point blade to the frog? I have a few OO9 points on my OO/HO layout & had problems with the frog shorting The blades are not isolated from the frog which meant that if the point motor was not aligned properly the the switch in the point motor would change over before the blade moved away from the rail causing a short until the blade moved away from the rail I don't see how this can cause a short, they are 2 different circuits John

Addiing to Allan Andi & Oldddubbers . Depending on which way the tortoises are mounted, I.E. before the throw bar or after will determine which connection on the Tortoise (2 or 3) goes to railA In the drawing if the Tortoise on the LH gives the wrong frog polarity then change the wires from the DCC bus to the Tortiose as shown on the RH side hope this helps John

If the following diagram is the circuit you are describing then my answer is no The following 2 diagrams should be ok for building lighting By adjusting the resistor values in the top diagram each LED's brightness can be adjusted by varying the value of its resistor. I would start with 1k resistors, if too bright then try 2k2, 4k7 or even 10k In the lower drawing the 3 LEDs in series should be identical(from the same batch) for best results I would start with a 1k & adjust the value up or down to get the required brightness Hope this helps John

I tend to agree with 5BarVT The added beam should provide some added strength & rigidity John

This problem has been raised before & several people (including me) have come up with the nail polish method Disadvantages it increases the length of the dead section at the V It will ware off eventually Advantages Cheap Quick Easy What FoxUnpopuli said but with pictures The red part is the minimum area needed to be covered with nail polish John

Glass, Wood, Uranium, Mercury One is transparent one is a liquid one is radioactive one was alive John

In case you missed it, this is how i repaired mine John