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Posts by royfellows

Showing 3873 results below:

Author Message
Topic: Mines of the Tamar Valley
royfellows

Forum: General Chat   Posted: 22/02/2010 18:32:54   Subject: Mines of the Tamar Valley
I agree that it needs sorting but its not my turf, mine is central Wales.

However, looking at Regional Editors I am down as "South West England", ouch, no its central Wales.

More
Topic: Edge of Darkness being remade
royfellows

Forum: General Chat   Posted: 19/02/2010 20:12:39   Subject: Edge of Darkness being remade
Gold with Roger Moore has fantastic cage ride down the vertical to where it hits the vein, then a high speed skip ride down the underlie. (1974)
Yes, yes yes
Topic: SW Selfish picture re(quest).... HOW OLD!!
royfellows

Forum: South West England   Posted: 19/02/2010 19:29:44   Subject: SW Selfish picture re(quest).... HOW OLD!!
I think everyone here aught to stop and think about the history of photography for a moment.

Artist’s sketches were being used up to the 1870s because a photographer needed a virtual carloa
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 15/02/2010 17:30:03   Subject: My Oldham Conversions
Mr Morlock, thanks.

Nothing like an R5, there is a picture on KD web
[url]http://www.kaidomain.com/ProductDetails.aspx?ProductId=10062[/url]
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 15/02/2010 17:25:58   Subject: My Oldham Conversions
Para 3 of the above (Vanoord) paste in is wrong as I expect it was based on paper estimations rather than practical testing as I have done. Anyone with me yesterday would agree with me that the R5 XP-
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 15/02/2010 16:12:34   Subject: My Oldham Conversions
I have never seen an R2 or experimented with one.

Is it small footprint same as the R5
The R5 is about the same as the head of a pin, I kid thee not.

A likely explanation is
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 15/02/2010 14:59:43   Subject: My Oldham Conversions
YES!
This is exactly what I am thinking of doing. Obviously, the nearer the glass a bare emitter, the more light out at the front. And as I have said, it is a fantastic flood, just like the old c
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 15/02/2010 12:27:12   Subject: My Oldham Conversions
CREE R5 Emitters.

Over the weekend I have been testing one of these in a slate mine using an improvised caplamp, and have to give all other lamp builders a warning about these.

I
Topic: Help- Forest Of Dean engine houses / surface remains
royfellows

Forum: General Chat   Posted: 09/02/2010 20:21:22   Subject: Help- Forest Of Dean engine houses / surface remains
Mr ICLOK
PM on the way, please feel free to mention my name when you contact the person recommended in the PM.
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 04/02/2010 18:43:21   Subject: My Oldham Conversions
WorkStar new design

Out of necessity I have had to develop a new version of my WorkStar lamp due to non availability of the cast aluminium reflector unit previously used.
That unit w
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 03/02/2010 18:43:13   Subject: My Oldham Conversions
I have done some thorough testing, what I posted before was TOTAL RUBISH and should be ignored.
I don’t know what went wrong, but it was done rather quickly.

The resistors do not make
Topic: Photographic completion
royfellows

Forum: General Chat   Posted: 29/01/2010 20:06:05   Subject: Photographic completion
Damit.
The piranha have gone, the Uzi has gone, and I no longer hold a Fire Arms Certificate, I suppose I could always run him down with my Skody.

Tell you what though, he is bloody go
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 29/01/2010 15:21:05   Subject: My Oldham Conversions
More

Very roughly.

Vin = 3.5V Iin = 0.9 amps
Vout = 3.2V Iout = 1.02 amps

Watts in = 3.26 watts out = 3.15
Series resistor used with 3 chip AMC 7135 = 0.14 o
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 29/01/2010 09:36:01   Subject: My Oldham Conversions
Last night I did some tests in the dark outside.
The R5 with the 28mm reflector is bloody marvellous, trust me.

With an 18mm reflector its light going everywhere, and worse still use
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 28/01/2010 16:52:40   Subject: My Oldham Conversions
This is just a repeat of what I have posted to ME, for the benefit of those here who dont use that site.

I have just received my R5 from KD and run some tests

Mr Kai Lam velly re
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 15/01/2010 16:40:54   Subject: My Oldham Conversions
Right, now I get it.

There lies the advantage of the lower Vf of the LEDs. I didn't understand you at first. This why I have had to have individual drivers to each LED in my maggie, Crees a
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 15/01/2010 16:19:40   Subject: My Oldham Conversions
The SSC/Cree quads are all low Vf but wont run on single or multi parallel 18650s.

Off the top of my head, hot off charger about 4.16V = 2.2 amps
down to 3.7V = 1.4 amps

Mr
Topic: Welsh Highland Railway
royfellows

Forum: Mine Tramways and Railways   Posted: 15/01/2010 11:49:23   Subject: Welsh Highland Railway
Mmm
I have read all of the comments and am now starting to wonder if there is some local politics involved that we dont know about.
I appreciate that north Wales police are not flavour of th
Topic: Interesting site on LED Mine/caving lights.
royfellows

Forum: Lamps & Lighting   Posted: 15/01/2010 09:20:14   Subject: Interesting site on LED Mine/caving lights.
I thought that I aught to mention that his designs are just simple resistor circuits, as such would give very poor performance in terms of efficiency and light level.
Topic: Welsh Highland Railway
royfellows

Forum: Mine Tramways and Railways   Posted: 14/01/2010 20:40:57   Subject: Welsh Highland Railway
I have just looked at your link Dave, and you are right about this, I am therfore wondering if the problem relates to the 'sweep' in the rails?

Whatever, it looks as though they have a prob
Topic: Welsh Highland Railway
royfellows

Forum: Mine Tramways and Railways   Posted: 14/01/2010 20:23:47   Subject: Welsh Highland Railway
This looks to me like a good old fashioned cockup.
If the rails crossed the road at a right angle as with normal level crossing then no problem, but the danger lies in the sweep which partially f
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 14/01/2010 18:47:48   Subject: My Oldham Conversions
Hi gang

I have just been outside testing the new MagnumStar in the dark, because there is melting snow about it quite misty and one can discern the beam patterns.

At the risk of
Topic: Foty Archive Album (album)
royfellows

Forum: North Wales   Posted: 14/01/2010 14:42:34   Subject: Foty Archive Album (album)
Yes, it’s a reminder of what has been lost.

I can remember in 1986 running down to the car park and my motor and excitedly telling my friend Maureen about my discovery.

The Vott
Topic: Croesor & other mines on S4C (viewable online)
royfellows

Forum: North Wales   Posted: 13/01/2010 20:26:08   Subject: Croesor - really?
[quote="hymac580c"][quote="Tamarmole"]Mind you, you should have seen the van afterwards![/quote]

In 1992 we had a rusty Mk.3 Escort estate. I drove it up to Croesor with the wife, dog and a
Topic: Croesor & other mines on S4C (viewable online)
royfellows

Forum: North Wales   Posted: 13/01/2010 20:18:57   Subject: Croesor - really?
Oh Peter, this is seriously funny.
But its right what I was saying about filmakers, they just have to do it, I dont think they can help it.
Topic: Croesor & other mines on S4C (viewable online)
royfellows

Forum: North Wales   Posted: 13/01/2010 15:22:03   Subject: Croesor - really?
[quote="Peter Burgess"]Give credit to some film-makers, though. The BBC made a good effort filming underground for a series coming out soon on the Natural History Museum, as faithful as they could be
Topic: Croesor & other mines on S4C (viewable online)
royfellows

Forum: North Wales   Posted: 13/01/2010 15:19:51   Subject: Croesor - really?
Yes Mr Derickman, I think you have them figured out.

Any SCMC on here today?

Remember the "999" reconstruction of the Cot Valley rescue, filmed at Snailbeach was it?
Perkins
Topic: For Sale - Wiseled Tactical 1500
royfellows

Forum: For Sale! (and wanted / for swap)   Posted: 13/01/2010 14:57:36   Subject: For Sale - Wiseled Tactical 1500
A bit off thread but there is a guy on Candlepower Forums has taken a DX 5 bore reflector such as I use in the Maggie and put 5 MCE Quad dies into it!

It burns for about 3 minutes before it
Topic: Croesor & other mines on S4C (viewable online)
royfellows

Forum: North Wales   Posted: 13/01/2010 14:53:27   Subject: Croesor - really?
I would not fret on this.
When they are filming anything they take whatever libeties they like, like setting up a dummy pitch for him to abseil back in the studio, filming the entrance to Croesor
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 12/01/2010 16:09:29   Subject: My Oldham Conversions
Thanks for your comment, I have tried to get the right balance between throw and spill on the full power setting.

Next, its photo lamps!
I already have an emitter and driver solution f
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 12/01/2010 12:53:47   Subject: My Oldham Conversions
The issue with the cap lamps is the old one, right back where I started, HEAT.

I built one with 3 X D BIN SSC P7s, my system handles it, just!

It is obvious that there is a limit
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 12/01/2010 11:13:12   Subject: My Oldham Conversions
:lol:
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 12/01/2010 10:58:55   Subject: My Oldham Conversions
I have just assembled the upgraded MagnumStar and tested it in my hall.

Initial testing shows a draw of 33.5 watts on full power, it is extremely unlikely that any attempt will be taken to
Topic: Does cold weather ventilate workings?
royfellows

Forum: General Chat   Posted: 11/01/2010 12:29:35   Subject: Does cold weather ventilate workings?
I have no experience at all of this however it appears entirely logical that if the outside air is cold, then the warmer air from the mine will rise up the shaft thus ventilating the workings.
<
Topic: Blaenavon Ironworks User Album (album)
royfellows

Forum: South Wales   Posted: 10/01/2010 21:42:02   Subject: Blaenavon Ironworks User Album (album)
Hi Henry
I have to compliment you on your family research, its very interesting and topical to this website.
I encourage you to maintain you research into your family history with a view to
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 10/01/2010 17:32:11   Subject: Running out of road salt...
Thanks John.

Been some odd weather here today, its been snowing LEDs

Could this be the final proof of CO2 climate change?

We all know what the PN junction temperatures
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 10/01/2010 17:13:12   Subject: Running out of road salt...
If you get fed up give me a ring and you can drop in for a coffee.
We could talk about lamp building for a change.
Location is on my website
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 10/01/2010 16:18:36   Subject: Running out of road salt...
[quote="Morlock"][quote="royfellows"]I wish it would change, I am stuck at home this weekend and not liking it a bit, but when I look out of the window........[/quote]

Roy, what's it like u
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 10/01/2010 15:27:52   Subject: Running out of road salt...
I wish it would change, I am stuck at home this weekend and not liking it a bit, but when I look out of the window........
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 10/01/2010 13:52:51   Subject: Running out of road salt...
I while ago someone I was talking to commented
"At one time they tell you one thing, at another something different", I take no notice of any of them and just get on with my life.

Basi
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 10/01/2010 12:45:10   Subject: Running out of road salt...
Hi Peter
I have read through a lot of them and they are disturbing reading, and even George Monbiot agrees that they are genuine, no question about it.
I will post the links.
It also ap
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 10/01/2010 12:06:26   Subject: My Oldham Conversions
The Cree R5 XPG

I am now looking at these, Kaidomain have them in stock both on 20mm bases suitable for the UniStar and 14mm bases suitable for the MagnumStar. I have just downloaded the da
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 09/01/2010 16:43:17   Subject: My Oldham Conversions
Thanks for your interest.
If you look at my right hand wall you will see the difference in spill between the different lamps.
Notice that the Fenix wastes nothing while the Roy lamp Q5 a li
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 09/01/2010 14:47:26   Subject: My Oldham Conversions
I have some results.
First, the beam width that I described in my last is nonsense, I had not got it in the reflector correctly. The actual beam appears about 50% broader than a Q5 in a DX 18mm r
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 08/01/2010 21:46:46   Subject: Running out of road salt...
Sorry, forgot to say Politics, Religion and football

I’m logging off for night now anyway, have fun.
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 08/01/2010 21:36:08   Subject: Running out of road salt...
A good answer Peter, I compliment your sharp mind.

However:
On one point it’s a case of time will tell, and nothing that we can do or say will change that.

On the other, I h
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 08/01/2010 21:23:25   Subject: Running out of road salt...
If you are refering to me Peter, we are in complete agreement.

Yes, its politics.

NOT science.
Topic: Running out of road salt...
royfellows

Forum: Scotland   Posted: 08/01/2010 21:16:12   Subject: Running out of road salt...
I have just come over to here for a look, I have been posting on ME and am in full steam tonight on the the thread "Its snowing".
I am surpised to see that this thread is going in the same direc
Topic: My Oldham Conversions
royfellows

Forum: Lamps & Lighting   Posted: 08/01/2010 18:30:12   Subject: My Oldham Conversions
I’m back!

I have just successfully mounted a bare Cree MCE M BIN 750 lumen quad die onto a 14mm heatsink base designed for the Q5.
I have mounted it in a DX 5 lens reflector and powere
Topic: Remote control and LED floods
royfellows

Forum: Underground Photography & Video   Posted: 07/01/2010 19:45:25   Subject: Remote control and LED floods
[quote="james l"]Ive been watching this thread with interest ,I also own a 9500 camera,and have noticed that the Fujifilm RR-80 USB shutter release which is electronic also works on that Camera,dont k
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