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Most-Recent O Gauge Topics:

Richard E
Topics: 45   Replies: 18
posted on Aug 25, 2014:



Nothing to do on a summer afternoon but watch trains.
Railfan
LMS Lines
Topics: 5   Replies: 4
posted on Aug 24, 2014:




This is a scratchbuilt 1:48 model of the O'Keefe Building located on Market Street in Maysville, Kentucky. The first picture in this set is from a postcard showing the building as it appeared in 1915. The last picture in the set is the building during a visit to Maysville in 2012. I modeled the 1915 version of the building that housed the DeNuzie bookstore. It was constructed from styrene strip and N Scale Architect styrene brick sheet. Detailed interiors were built for each of the three floors. The first floor contained the DeNuzie bookstore. Based on 1916 newspaper advertisements available on the internet, this store not only sold books but also games, cards, stationery, and novelties. The second and third floors were modeled as apartments that contain identical floor plans. I recently displayed this building at the IGMA Guild School in Castine, ME. It is now part of a town scene on my layout.




GRS Microlighting fluorette bulbs were used to light the building interior.




First Floor Interior






Second Floor Interior


Third Floor Interior


The DeNuzie Bookstore is part of a main street scene on my layout.


Other buildings in this scene contain detailed interiors. Photographs of Beggars Banquet and Mary and Frank were previously posted on this site.


The White Gallery now occupies the O'Keefe Building in Maysville, KY. The exterior of the building has changed little over 100 years.
DeNuzie Bookstore
Balto&NY
Topics: 40   Replies: 33
posted on Aug 18, 2014:


RJ tower controls the branch line switch for Endsville at Rossiter Junction on the Baltimore & New York Railway. In the distance, a train is approaching. Soon the crossing gates are going to drop on Route 5.
The Hudson should get across OK but the '49 Mercury leaving the station parking lot will probably need to wait.

RJ Tower and Route 5 Grade Crossing
Aubv
Topics: 6   Replies: 9
posted on Aug 18, 2014:







Backdrop on Canvas (Basking Ridge NJ)
stan
Topics: 9   Replies: 12
posted on Aug 17, 2014:

This is the 60' (15") observation car from the MTH 6109 set. The cars use 2 type 1445 incandescent bulbs to illuminate silhouette style windows. The 2 red marker lights and the above door white/clear signal light are barely visible even at command track voltage. This is because these 3 lights are simply lenses that attempt to capture the interior lights from the bulb.



I replaced the 2 bulbs with warm-white LEDs using the now popular and reasonably priced 12V LED strips. There are various versions of these strips but a common type operates at 12V DC and is a repeating set of 3-LEDs on 5cm (2") adhesive backed sections. If you buy a 5 meter strip, you get 300 LEDs on 100 5cm sections of 3 LEDs each. The cost is only 2 or 3 cents per LED from eBay or Amazon!



The strips start to light (dimly) at about 7-8V DC and reach nominal full brightness at 12V DC. So the task is to generate a regulated/constant DC voltage starting with the varying O-gauge track voltages.



One approach is to use off-the-shelf DC-to-DC converter modules. These are less than $2 on eBay and can be adjusted via a screwdriver trimpot to set the output voltage. 3 additional components, with soldering required, make these modules work with AC track voltages. A 22 uH inductor makes this compatible with MTH-DCS command control. A bridge-rectifier makes performs the AC-to-DC conversion as the modules require DC input, and a electrolytic capacitor provides energy storage to demote flickering due to dirty or intermittent wheel/roller contact.



The first task is to access the track voltage. In this case the bulb bayonet style sockets were fastened to the chassis itself so there were no wires to access the outer-rail voltage. A wire was soldered to one socket. The other voltage (center-rail) was accessed by splicing the wire that connected the two bulb sockets.

There are various types of DC-to-DC modules; in this case a so-called "buck-boost" module was used as this can generate a regulated output voltage irrespective of whether the input voltage is below or above the desired output voltage. This means both conventional and command voltage operation is supported...as well as both AC and DC.



One assembly technique is to use copper-clad, scissor-cuttable board. Using a hobby knife, small islands of copper are created to create a surface to mount and solder components.



Heat shrink tubing covers the 3 components and the 2-wires in (track voltage) and 2-wires out (unregulated DC voltage). The DC-to-DC module was set to 9V DC as this provided suitable brightness. 18 LEDs or 6 sections (6 x 5cm = 30 cm or 12") were attached to the ceiling. A 2-pin connection was used between the DC-to-DC converter module and the LED strip.



To allow brightness adjustment, the regulator module was mounted upside down and a hole drilled on the chassis to access the screwdriver adjustment. Obviously this can't be done with the car on a track so the adjustment has to be done with alligator-clip jumpers or the like attached to the center-rail power pickup and outer-rail wheel.



To handle the 2 red markers and white signal light, a single 5cm/2" LED section was modified to provide 3 discrete white LEDs. Wire jumpers were attached between the LEDs and then the strip was cut.



The 3 LEDs with then glued (epoxied) to the existing lenses.



These 3 LEDs are electrically just another 5cm/2" section so they are powered from the LED strip itself. This makes a total of 18 interior, 2 marker, and 1 signal = 21 LEDs.



Now the car operates at constant-brightness across the full conventional/command track voltage range including both DC and AC operation.



With the DC-to-DC module set to 9V, the current draw of the 21 LEDs was about 20 mA total or less than 1/4 Watt. The DC-to-DC module itself requires power but the total power to the car was about 1/2 Watt irrespective of track voltage. In contrast, the 2 type 1445 incandescent bulbs required over 5 Watts at command voltage; and even drawing 10 times the power, it was not as bright as the LED system.
Constant brightness passenger car using 1...
TRAINS4U2C2
Topics: 43   Replies: 70
posted on Aug 17, 2014:

I have just aquired these real train parts. I reconize the rails from a caboose, The brake wheel has a vertical shaft so I don't think it came from a caboose. The steps ( 2 sets back to back ) hard to say what they came from.

I'm just starting my train room aprox 25' x 25' and I would like to make a caboose wall section using these parts. I'd like it to look like a back of a caboose.

I'm asking for ideas and thoughts for this project.









Thanks,

Doug
A Call for Help
Aubv
Topics: 6   Replies: 9
posted on Aug 17, 2014:

This bridge is a model, based on the Tunkhannock Viaduct. Also known as the Nicholson Bridge. The bridge is located in NE Pennsylvania. As is the layout, where the model bridge is installed.

Before installation



Installed without lighting.


Installed with LED lighting


The bridge is modular in design. The spans measure 11-1/2" from center to center on the piers and the height of the road bed is 13-1/2". The design allows the piers to be cut down, to accommodate different height requirements.


Tunkhannock Viaduct. (Nicholson Bridge)
  


O Gauge General Categories:

Backdrops (14)
   Backdrop on Canvas (Basking Ridge NJ)
LED Lighting (29)
   Constant brightness passenger car using 12V LED strip
Great Bridges of O Gauge (58)
   Tunkhannock Viaduct. (Nicholson Bridge)
Weathering (12)
   Lehigh Valley 'wrongway door' box car.
LED Lighting (29)
   Cheap LED Tea Candles
Trackside Structures & Accessories (83)
   custom cardstock buildings
Track Ballasting (8)
   Track Ballast for Gargraves track
Great Engine Facilities of O Gauge (22)
   Diesel facility using an expanded Lionel transfer table (Ala...
Towns & Urban Scenes (59)
   Country gas station
Roundhouses (7)
   Roundhouse ON30 style

O Gauge Member Blogs:

Aubv  (4) Richard E  (39)
LMS Lines  (4) The Portland Rose  (8)
stan  (7) Balto&NY  (38)
TRAINS4U2C2  (31) AG  (26)
RogerPete  (4) Hartman  (15)
Andrew Foster  (1) PeterA  (4)
Skip99  (3) Zeke  (9)

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