Search found 54 matches

by DavidM
Sun Sep 27, 2020 5:20 pm
Forum: Demonstrations and Talks
Topic: Resistance soldering
Replies: 25
Views: 528

Re: Resistance soldering

Great video David. Not just a masterclass on the RSU, but a masterclass on how to do a great presentation as well! I have one of the original Bernard Weller units from the early 90s - I use it all the time, but I’ve picked up a lot of new ideas here especially with alternative support for the work a...
by DavidM
Sat Sep 19, 2020 8:05 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 23
Views: 4058

Re: Little & Large - The Socially-Distanced Challenge

Wonderful stuff Guy - so many different skills at work! Many years ago I made some printed circuit boards (PCBs) by scanning and laser printing onto silicone release paper, then laminating with a domestic iron onto copper-clad sheet before etching with ferric chloride. It worked well for PCBs but wa...
by DavidM
Thu Sep 17, 2020 10:58 am
Forum: Virtual Scaleforum
Topic: VIRTUAL SCALEFORUM & SCALEFOUR NORTH
Replies: 132
Views: 6952

Re: VIRTUAL SCALEFORUM & SCALEFOUR NORTH

Tell us the details Doug, I’m sure the Sydney group will join you!

David Murrell
by DavidM
Thu Sep 03, 2020 3:59 pm
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 427
Views: 77195

Re: Brimsdown-The last grand project.

Thanks very much Tony, much appreciated. As usual for this thread, an elegant solution!
I didn’t realise you were using a DPDT momentary to initiate the 555 reset but all now makes sense. Having the component values for the control circuit is very helpful.

Regards,
David
by DavidM
Wed Sep 02, 2020 10:25 pm
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 427
Views: 77195

Re: Brimsdown-The last grand project.

Thanks Keith, that does seem extremely good value.
I was interested in the implementation of the 555 timer circuit and reset function via relay 11.

Regards,
David
by DavidM
Wed Sep 02, 2020 7:09 pm
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 427
Views: 77195

Re: Brimsdown-The last grand project.

Do you have a circuit diagram for your relay card Tony?

David Murrell
by DavidM
Mon Mar 02, 2020 9:47 pm
Forum: Starting in P4
Topic: Ratio Midland Carriage bogies
Replies: 61
Views: 6149

Re: Ratio Midland Carriage bogies

That’s very interesting Ted, and most helpful.
Are you adding much extra weight to these coaches? And what do you regard as the ideal final weight using this approach?

David Murrell
by DavidM
Mon Feb 10, 2020 3:28 am
Forum: Trains: Model and Prototype
Topic: A question of colour
Replies: 18
Views: 2795

Re: A question of colour

Here’s a start:
https://m.wikihow.com/Make-Black

Maybe a demo at Scaleforum, just needs a few tubes of acrylic - and a willing 4 year old.

David
by DavidM
Wed Nov 20, 2019 10:12 am
Forum: Track and Turnouts
Topic: Exactoscale Turnout Chairs
Replies: 10
Views: 2701

Re: Exactoscale Turnout Chairs

https://www.modelu3d.co.uk/product/2121/

Look under infrastructure!

David
by DavidM
Sat Feb 23, 2019 12:40 pm
Forum: Wagons
Topic: Protofour W iron units
Replies: 8
Views: 2300

Re: Protofour W iron units

I’ve used this system too, building about two dozen wagons more than 30 years ago using ordinary rubber band strips and MJT W irons. It does seem to work fairly reliably providing the same care is taken to ensure the units are aligned carefuly and secured squarely, as applies to any system. At the t...
by DavidM
Mon Dec 31, 2018 2:39 pm
Forum: Other Workshop Practice
Topic: best insulation material in loco?
Replies: 4
Views: 1786

Re: best insulation material in loco?

Polyimide film, such as Kapton tape, is widely used for both insulation and thermal protection in PCB production, especially in the aerospace industry. It was even used to plug a hole in the International Space Station! It is available in various widths and although a lot more expensive than PVC ins...
by DavidM
Sun Mar 04, 2018 11:52 pm
Forum: Scenery and Structures
Topic: 1970s street scenes in colour - full of modelling detail
Replies: 11
Views: 3563

Re: 1970s street scenes in colour - full of modelling detail

An interesting topic! Colour rendering in film emulsions and it's variation is a complex subject, made more difficult by our own colour perception. Kodachrome was a fairly consistent emulsion by the 1970s but even so there was variation between batches - large users for commercial purpose (such as N...
by DavidM
Sun Feb 18, 2018 9:54 pm
Forum: Materials and Techniques
Topic: Working with cutting machines
Replies: 5
Views: 2386

Re: Working with cutting machines

I agree Ralph, I was nervous about the ongoing delay too but the pre-release offer was too good to ignore! It was also important for a succesful release that it was truly reliable. I had been following their story since the original Emblaser was released and it sounded like the development team were...
by DavidM
Sun Feb 18, 2018 1:54 pm
Forum: Materials and Techniques
Topic: Working with cutting machines
Replies: 5
Views: 2386

Re: Working with cutting machines

Very encouraging results, Ralph. I took delivery of the Emblaser 2 about a year ago and was quite impressed with my initial experience, using MDF, despite the clunky Laserweb package. I have downloaded Lightburn but due to office space contraints have yet to get very far with it, however it looks to...
by DavidM
Mon Feb 12, 2018 12:03 am
Forum: Jeremy Suter
Topic: GWR Steam Railmotor Chassis
Replies: 247
Views: 65988

Re: GWR Steam Railmotor Chassis

+1

Just brilliant Jeremy, superb engineering.
For me, this is what our side of the hobby is all about!

David
by DavidM
Sun Jan 28, 2018 12:44 am
Forum: Craig Warton
Topic: wagon building progress.
Replies: 111
Views: 39174

Re: wagon building progress.

Nice work Craig, hope you can bring them along to the next group meeting in February. Doug, regarding sprung buffers: My clear preference too is to have them sprung if possible but it's not always the case of course, especially with the self-contained variety. I suspect that we can get away with hav...
by DavidM
Mon Jan 22, 2018 3:17 pm
Forum: Coaches and NPCS
Topic: NER Coaches and NPCS
Replies: 47
Views: 16910

Re: NER Coaches and NPCS

Doug, BCS Auto paints in Sydney can supply automotive paint in smaller quantities and can ship 35mL bottles (for small repairs) by ordinary post, larger quantities (500mL or more) by road. They have formulae going back to the 1950s and claim to be able to match anything. You can also arrange to coll...
by DavidM
Mon Aug 29, 2016 6:15 am
Forum: Track and Turnouts
Topic: Society Gauge Widening Tool
Replies: 325
Views: 67319

Re: Society Gauge Widening Tool

Very eloquently said, Russ.

I too am glad to see you back!

David
by DavidM
Thu May 05, 2016 8:50 pm
Forum: Track and Turnouts
Topic: Building a Double Slip
Replies: 53
Views: 15084

Re: Building a Double Slip

Following on from this, has anyone any long term experience of what these chairs are like once they are installed? Are we finding that they have a finite life? If so, and the problem is also endemic to current production, then track built now could have a limited life span. Philip, I have recently ...
by DavidM
Sat Jan 09, 2016 8:06 am
Forum: Track and Turnouts
Topic: Trackwork Fault Finding Checklist
Replies: 3
Views: 1978

Re: Trackwork Fault Finding Checklist

A great article, Mark - and much needed. It nicely complements Howard Bolton's recent articles.
As usual, the Snooze is well worth the wait...

David Murrell
by DavidM
Sun Oct 11, 2015 2:16 am
Forum: Steam Locomotives
Topic: Wheels for GWR 68xx Grange locos
Replies: 20
Views: 6622

Re: Wheels for GWR 68xx Grange locos

Jim,

I think beauty is in eyes of the beholder! I find the Grange well-proportioned and balanced, more so than either a Manor or Hall. I prefer Churchward & Collett tenders to those that followed. And I find Dukes and Dukedogs the essence of graceful perfection... :o

Each to their own!

David
by DavidM
Tue Jul 21, 2015 2:27 am
Forum: Craig Warton
Topic: GWR Goods hand barrow.
Replies: 19
Views: 6393

Re: GWR Goods hand barrow.

Craig, it looks like the giant Echidna is lying in wait for the next barrow-man to come by. :?

Very nice work, both of you!
by DavidM
Fri Mar 13, 2015 11:26 pm
Forum: Scenery and Structures
Topic: The smelly stuff
Replies: 16
Views: 6450

Re: The smelly stuff

This may or may not help. A small gasworks in 1939: stourport_gas_works_1939.jpg usage required attribution: © http://www.britainfromabove.org.uk/image/epw061731 Martin. Very interesting photo (and link) Martin! As a kid in the mid 1960s, we lived a short distance from Stourport. I remember the pow...
by DavidM
Sun Sep 28, 2014 8:42 pm
Forum: Exhibitions
Topic: Scaleforum 2014
Replies: 197
Views: 49949

Re: Scaleforum 2014

I would like to add my thanks to Terry and his team for such an excellent weekend - I was enthralled right up to the final minutes, when I reluctantly dragged myself away from a fascinating discussion with Steve Duckworth on the art and science of chassis construction. Congratulations to all, especi...
by DavidM
Fri Sep 26, 2014 6:21 am
Forum: Exhibitions
Topic: Scaleforum 2014
Replies: 197
Views: 49949

Re: Scaleforum 2014

If you do make use of car parking space in the hospital, please make sure that you get one of our permits, otherwise you may get clamped or fined. :( If the available space is full it may be easier to find a spot on local roads but please do not block entrances. So where do we get these permits fro...

Go to advanced search