Search found 713 matches

by Jol Wilkinson
Wed Apr 04, 2018 9:01 pm
Forum: Electrics
Topic: Pentroller repairs
Replies: 50
Views: 15154

Re: Pentroller repairs

The handheld Pentroller shown differs from the one I had a problem with. I think Stuart Hine may have changed the pcb design at least once. Mine had a small IC on the soldered side that had burnt out, apparently a resistor array although I couldn't identify it as the makings had gone. I contacted St...
by Jol Wilkinson
Tue Mar 27, 2018 6:19 am
Forum: Painting and Weathering
Topic: Bob Moore Lining pens
Replies: 10
Views: 4283

Re: Bob Moore Lining pens

Adrian, do you have a copy of the instruction? Those mention mentions adding a drop of lighter fluid,as David says, on top of the paint to reduce surface tension. Gently blowing on top of the paint ix also suppose to get it to flow. I wonder if a drop of thinners first, then paint, then lighter flui...
by Jol Wilkinson
Mon Mar 26, 2018 12:22 pm
Forum: Painting and Weathering
Topic: Bob Moore Lining pens
Replies: 10
Views: 4283

Re: Bob Moore Lining pens

I Have a Bob Moore pen with fine and standard nibs and also find that the standard works well with virtually any modelling enamel paint, but the fine nib is very inconsistent. I've tried gloss and satin, as well as thinning with white spirit or cigarette lighter fluid. I also bought the finest of th...
by Jol Wilkinson
Mon Mar 26, 2018 9:48 am
Forum: North East Essex (NEEAG)
Topic: NEEAG March meeting
Replies: 0
Views: 954

NEEAG March meeting

NEEAG's March meeting has been postponed to Thursday 5th April as several of the members are involved in the London Road expedition to the York MRS over Easter. The meeting will be held at 7:00 in the usual venue: The Colchester Society of Model and Experimental Engineers Clubhouse 13a President Roa...
by Jol Wilkinson
Sun Mar 25, 2018 4:02 pm
Forum: Other Workshop Practice
Topic: Soldering mazak
Replies: 15
Views: 5649

Re: Sildering mazak

Your Lordship,

this thread in that other place may help;

http://www.rmweb.co.uk/community/index. ... ast-metal/
by Jol Wilkinson
Fri Mar 23, 2018 3:05 pm
Forum: Baseboards and Carpentry
Topic: Proscenium arch size?
Replies: 30
Views: 10079

Re: Proscenium arch size?

Some contradictions appearing here, especially where exhibiting layouts are concerned. I support Iain's views that layouts should be well presented (and both own and have read his books), but we have to adapt those ideas to suit our own circumstances. Scaleforum and ExpoEM don't provide barriers, bu...
by Jol Wilkinson
Fri Mar 23, 2018 9:07 am
Forum: Baseboards and Carpentry
Topic: Proscenium arch size?
Replies: 30
Views: 10079

Re: Proscenium arch size?

I have shown this photo, not because it shows anything special, but illustrates one approach to "managing" the height of the viewing window. P1010326.JPG The black curtain pelmets are attached to the light boxes with Velcro, so for a permanent layout could be adjusted until you get to the ...
by Jol Wilkinson
Sat Mar 17, 2018 8:48 am
Forum: Other Workshop Practice
Topic: what flux for white metal?
Replies: 18
Views: 7079

Re: what flux for white metal?

I don't know the composition of Eames flux but a less aggressive flux is better with w/m. Stronger fluxes can leach out impurities in the metal, blackening the surface and making it more difficult for the solder to bond. I use LRM 6% Phosphoric acid flux on w/m and 12% on brass and n/s. Those who li...
by Jol Wilkinson
Mon Mar 12, 2018 9:27 am
Forum: Chassis and Suspensions
Topic: Motors running hot
Replies: 10
Views: 4542

Re: Motors running hot

David, could end thrust on the motor shaft cause this problem?. Most of the "gearboxes" we use rely on the motor design to take up the shaft end float and I have never experienced motor over heating, Although my locos only run for short periods now I did, for a time, own the four line test...
by Jol Wilkinson
Sun Mar 04, 2018 1:47 pm
Forum: On My Workbench
Topic: Stock for Cadhay
Replies: 36
Views: 11999

Re: Stock for Cadhay

Julian/Jol - how does this jig work? I can see that the point on this end in the photo can be used to verify position of AJ relative to track, but you both mention it was an AJ making/adjusting aid - how does that work? Chris Chris, the jig has two holes. Push the AJ wire into the deeper one and fo...
by Jol Wilkinson
Sun Mar 04, 2018 11:06 am
Forum: On My Workbench
Topic: Stock for Cadhay
Replies: 36
Views: 11999

Re: Stock for Cadhay

Chris this AJ jig came from the EMGS. I find it's easier to check the angles using this one. I agree with Gareth just a couple of posts above about horizontal freedom. AJs require packaging so that the AJ is not being touched at all IMHO unless we don't mind spending half the exhibition re-adjustin...
by Jol Wilkinson
Fri Mar 02, 2018 10:51 pm
Forum: Vehicle dynamics and trackholding
Topic: Flange thickness-effect of.
Replies: 56
Views: 13026

Re: Flange thickness-effect of.

Well I don't set out to vex people for the fun of it. Obviously I am in a minority of one. I'm not convinced by the drawing Jol, but I have to get a second rake of coal wagons to run on our club layout. So I'll experiment and follow the advice here, and just replace the 00 wheels with P4 ones and s...
by Jol Wilkinson
Fri Mar 02, 2018 2:30 pm
Forum: Vehicle dynamics and trackholding
Topic: Flange thickness-effect of.
Replies: 56
Views: 13026

Re: Flange thickness-effect of.

Jol thanks for the drawing. I'll think over that (work cancelled today) and get back later - but if you are right why do wagons derail? Do you buy that hocus pocus stuff that it's the difference you get by having 17.75 instead of 17.67? Julian, I am not claiming that what I promulgated is the defin...
by Jol Wilkinson
Fri Mar 02, 2018 11:18 am
Forum: Vehicle dynamics and trackholding
Topic: Flange thickness-effect of.
Replies: 56
Views: 13026

Re: Flange thickness-effect of.

Julian, Martin and Colin have already answered several of your points. So I will apply a little sloppy thinking as to why short wheelbase vehicles with no compensation or springing may stay on the uneven track we build. I suggest even the best made vehicles using pin point bearings and axles will ha...
by Jol Wilkinson
Thu Mar 01, 2018 8:23 pm
Forum: Tools and Techniques
Topic: The Adventures of an RSU Virgin
Replies: 45
Views: 14643

Re: The Adventures of an RSU Virgin

John,

those may have been the early pvc covered cables.

"Extraflex" silicon cables were originally offered as an option but have now have been standard supply for quite a few years.

Jol
by Jol Wilkinson
Thu Mar 01, 2018 5:04 pm
Forum: Tools and Techniques
Topic: The Adventures of an RSU Virgin
Replies: 45
Views: 14643

Re: The Adventures of an RSU Virgin

Clive, I don't know the spec. but LRM use a more flexible wire which is partly down to the covering. I think it is some sort of silicon rather than PVC insulation. A cable with more, smaller diameter, wires is also more flexible for a given diameter. Likewise the LRM probe uses a larger diameter car...
by Jol Wilkinson
Thu Mar 01, 2018 4:54 pm
Forum: Tools and Techniques
Topic: Resistance Soldering
Replies: 96
Views: 28995

Re: Resistance Soldering

David, the aim is to get minimum resistance around the circuit, so that the point where the joint being is - relatively speaking - high resistance, then keeping all the other connections as good as possible should be the aim. The banana plug into the concentric hole in the bolt probably gives more c...
by Jol Wilkinson
Thu Mar 01, 2018 2:16 pm
Forum: Tools and Techniques
Topic: Resistance Soldering
Replies: 96
Views: 28995

Re: Resistance Soldering

David, I have one of the original Exactoscale plates which does take up a bit of workbench space, but used with magnets I also find it useful as a jig for assembling a variety of things including plastic wagon bodies. The problems of heat conduction and current transfer are readily resolved. I use a...
by Jol Wilkinson
Thu Mar 01, 2018 1:55 pm
Forum: Vehicle dynamics and trackholding
Topic: Flange thickness-effect of.
Replies: 56
Views: 13026

Re: Flange thickness-effect of.

Richard, may I offer a little hope. Most of us have built track and stock using the gauges and products readily available from the Society and the "specialist" suppliers and by following the established techniques published over the years, guidance from fellow modellers, etc. Although we a...
by Jol Wilkinson
Wed Feb 28, 2018 5:41 pm
Forum: Tools and Techniques
Topic: The Adventures of an RSU Virgin
Replies: 45
Views: 14643

Re: The Adventures of an RSU Virgin

Steve, it isn't a LRM unit, nor does it look like any of the usual ones, except! The original Exactoscale unit was, IIRC, supplied as a bare transformer. DIY options included a case. The probe also looks like the Exactoscale type which had a modified co-ax plug as the carbon road holder, so could it...
by Jol Wilkinson
Wed Feb 28, 2018 2:28 pm
Forum: Tools and Techniques
Topic: Rolling brass roofs
Replies: 8
Views: 3118

Re: NEEAG February meeting

I cut my roof and other blanks from brass sheet with a steel rule and a sharp Stanley knife, scribing the brass repeatedly until there is a registration mark on the other side. I then bend back and forth along the line until it snaps and tidy up with a file. I do the cutting on a piece of wood beca...
by Jol Wilkinson
Wed Feb 28, 2018 2:21 pm
Forum: Where to Find?
Topic: Parkside Kits
Replies: 42
Views: 12011

Re: Parkside Kits

But there are suggestions that Slaters may begin to supply their models again - and POWSides appear to already be able to provide the PO wagon kits. The open wagons are available on the POWsides website. What else was there?. The GWR carriages, MR six wheel carriages, wagons, vans and cattle trucks...
by Jol Wilkinson
Wed Feb 28, 2018 1:30 pm
Forum: Tools and Techniques
Topic: Rolling brass roofs
Replies: 8
Views: 3118

Rolling brass roofs

Following a discussion in a recent NEEAG monthly update, Richard McLachan has written a piece on how he came about rolling brass roofs and how he did it. I've attached it for reference.

Rolling and cutting brass roofs.docx
(17.8 KiB) Downloaded 361 times
by Jol Wilkinson
Wed Feb 28, 2018 1:26 pm
Forum: North East Essex (NEEAG)
Topic: NEEAG February meeting
Replies: 5
Views: 2063

Re: NEEAG February meeting

Doug,

Richard has written up a piece on how he came to roll brass carriage roofs and went about it.

I'll post it in the Tools and Techniques section.

Jol
by Jol Wilkinson
Wed Feb 28, 2018 11:02 am
Forum: Where to Find?
Topic: Parkside Kits
Replies: 42
Views: 12011

Re: Parkside Kits

David, I have read that suitable S/H moulding machines can be brought relatively cheaply. The difficulty with saving the Coopercraft range lies elsewhere. Robert Tivendale at POWsides has negotiated direct supply (from Slaters presumably) of their POW and MR wagons kits. They can be found under &quo...

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