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Posts by royfellows

Showing 3997 results below:

Author Message
Topic: 3D printing a head lamp / battery pack
royfellows

Forum: Lamps & Lighting   Posted: 01/05/2015 08:03:38   Subject: 3D printing a head lamp / battery pack
I struggle to see how something can be waterproof but not dust proof?
I seek enlightenment

Topic: Leon Moissenets course notes
royfellows

Forum: General Chat   Posted: 29/04/2015 13:05:51   Subject: Leon Moissenets course notes
I have finally got round to digitalising Moissenets 1865 notebook on the preparation of ores at the Lisburne mines for his lessons given at the School of Mines. This was given me by the late David Bic
Topic: Smallcleugh Exploration History
royfellows

Forum: General Chat   Posted: 28/04/2015 21:41:47   Subject: Smallcleugh Exploration History
Re the Hydraulic Shaft incident.
It was Jim Rothery chairman of West Cumbria MRG and I have the journal write up on it entitled " The Rise and fall of Chairman Jim"
Can scan for you if you d
Topic: The NRW mine access agreement
royfellows

Forum: General Chat   Posted: 28/04/2015 17:13:51   Subject: The NRW mine access agreement
I am gradually getting my stuff sorted.
Temple RA is about to be filed, but no access until after 31st July due to bird breeding, its in the agreement.
Talybont is a bit more complicated as
Topic: Sale of mine sites in Cornwall.
royfellows

Forum: South West England   Posted: 28/04/2015 15:01:52   Subject: Sale of mine sites in Cornwall.
I have gone back to my source on this and will post as soon as I have something.
Topic: Sale of mine sites in Cornwall.
royfellows

Forum: South West England   Posted: 28/04/2015 12:32:48   Subject: Sale of mine sites in Cornwall.
It has come to my attention that the Duchy are selling various mines while retaining mineral ownership and that the following are coming up for auction straight away:

Winsor Mine (in three
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 27/04/2015 16:07:50   Subject: Fellows lamps forum.
LAST THREE ECOs
Nothing out there like them for the price!
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 27/04/2015 09:32:47   Subject: Fellows lamps forum.
[quote="Willey"]Hello Roy, I hope all is well. I am still a newbie underground but I would really like one of your ecostar lamps if you have one left. I have seen on the website you would like a chequ
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 24/04/2015 19:11:39   Subject: Fellows lamps forum.
Let us know what you think.
I only have one of the first batch left in stock, I have sold one to a 'name', I daresay we will get a review.
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 24/04/2015 13:54:10   Subject: Fellows lamps forum.
X1000 now has blue 'Nightrider' battery indicator same as the X2000 you turn upside down to actuate.

I follow the practice of incorporating into other lamps whenever possible useful feature
Topic: Hello from out in Las Vegas Nevada
royfellows

Forum: New recruits!   Posted: 23/04/2015 09:22:33   Subject: Hello from out in Las Vegas Nevada
Hi Joanne, how is Speedy these days.
Topic: Nangiles Adit
royfellows

Forum: South West England   Posted: 21/04/2015 21:37:01   Subject: Nangiles Adit
There is no adit down by the CA adit but there is part of the old CA system which connects with Nangiles by way of a loose passage, this comes in at the water level of the shaft at the end of the manw
Topic: Bwlchglas, what is happening?
royfellows

Forum: Mid Wales   Posted: 21/04/2015 20:34:06   Subject: Bwlchglas, what is happening?
[quote="SimonRL"]Thought it looked a bit film-set-esque![/quote]

Cant see my Skoda appearing in the movie though.

Now the red Mazda I used to drive was very authentic. Had an iss
Topic: Bwlchglas, what is happening?
royfellows

Forum: Mid Wales   Posted: 21/04/2015 16:18:41   Subject: Bwlchglas, what is happening?
It is Hinterland, its just been confirmed by the location manager. I should have known!

A bit of a novelty though while its there.
Topic: Bwlchglas, what is happening?
royfellows

Forum: Mid Wales   Posted: 21/04/2015 14:53:21   Subject: Bwlchglas, what is happening?
This is off the web re the film, look at no 5 down.

Currently unidentified

Information about the following filming locations from the early-2015 special would be welcome:
Topic: Bwlchglas, what is happening?
royfellows

Forum: Mid Wales   Posted: 21/04/2015 14:40:08   Subject: Bwlchglas, what is happening?
Its funny this is as it sort of broke a dream

Years ago I had a motor company and one week we went the whole week without seeing a single customer. I can remember speculating on where in th
Topic: Bwlchglas, what is happening?
royfellows

Forum: Mid Wales   Posted: 21/04/2015 10:20:08   Subject: Bwlchglas, what is happening?
Appeared early this year.
Anyone know anything?

[link]100727[linkphoto]100727[/linkphoto][/link]

Sales forecourt?
[link]100726[linkphoto]100726[/linkphoto][/link]
Topic: Grindon Hill Shaft (photo)
royfellows

Forum: North East England   Posted: 20/04/2015 12:03:08   Subject: Grindon Hill Shaft (photo)
I really have no idea but would be very careful
Hanging death, bad air, all suggests itself.

Inside the enclosure appears to be very vague about what is covered shaft and what is solid
Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 17/04/2015 13:17:00   Subject: Lamp Building for Dummies
Yes and the Chinese bike lamps and torches that use LEDs in arrays parallel them to a common driver!
:o
Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 17/04/2015 08:36:21   Subject: Lamp Building for Dummies
[quote="BertyBasset"]Does that mean that for multiple Leds, they need independent current sources?[/quote]

It depends how they wired, series, as Chris explained, the voltage adds up, in oth
Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 16/04/2015 08:29:48   Subject: Lamp Building for Dummies
Found an old one and just tried it in 2 minutes off the lab power supply. In Effect, driving at say 60 mA will work....for a time.
Volts Current
3.0 = 0.01
3.2 = 0.03
3.5 = 0.05
Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 15/04/2015 22:46:37   Subject: Lamp Building for Dummies
NO

Wouldn't it be nice if politicians gave such explicit answers to questions!

The difference in voltage between the Vf at the recommended current of 30 mA and poop will be less
Topic: Rhiwbach plans
royfellows

Forum: North Wales   Posted: 15/04/2015 22:34:19   Subject: Rhiwbach plans
Yes, I have them but on large sheets.
I can try to photograph them. I believe that I was given them a long time ago by 'Mole' Hine. If so I would need to ask him if OK first if only out of common
Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 15/04/2015 17:39:25   Subject: Lamp Building for Dummies
Good luck with it.

I think I have made my point about the voltage, so if you want a better burn time why not use 2 X 2AA holders wired together + to + and - to -, that is, in parallel. So y
Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 15/04/2015 08:18:40   Subject: Lamp Building for Dummies
[quote="Wormster"]hehe Roy!

Oh and I forgot to sa I saw it run on 2x AA duracell on the workbench!

[/quote]

So they must be parallel. 2S X AA = 3V, likely Vf of the LE
Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 14/04/2015 22:12:43   Subject: Lamp Building for Dummies
A bit more
Assuming they parallel, the AA battery holder is series (usually are, 1.5V only drives clocks) and the vF at a 30mA drive current is about 3V, then 4 AAs will give about 6V

Topic: Lamp Building for Dummies
royfellows

Forum: Lamps & Lighting   Posted: 14/04/2015 22:01:47   Subject: Lamp Building for Dummies
A few things.
Oldham headsets normally switch on the low side, the block at the bottom is usually called the "positive terminal block" which has an external stud which is to engage and contact th
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 13/04/2015 17:43:54   Subject: Fellows lamps forum.
[quote="NewStuff"][quote="royfellows"]...but the 4 cell packs are heavy and bulky[/quote]

I wonder what you would make of my 9 and 12 cell packs... :confused:[/quote]

I do a 12 c
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 13/04/2015 15:59:04   Subject: Fellows lamps forum.
Lynx X2000

I thought I had better put this up.
Max output 2200 lumens, combines beam with low output foot light.

Weight 200 grams

Price £175

Basically
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 13/04/2015 15:47:38   Subject: Fellows lamps forum.
[quote="gNick"]Roy,
A little question.

You say that your lights that work at a low voltage (single battery or multiples in parallel) will just get dimmer as the battery runs out wherea
Topic: New caplamp required
royfellows

Forum: General Chat   Posted: 13/04/2015 13:38:03   Subject: New caplamp required
The walk mode on all my lamps is about 200 lumens, battery time on this is 14 hrs plus for 4V lamps, 12 hrs plus for 8V lamps, on 2 cell battery packs.

8V lamps use 4 cells and are as effic
Topic: New caplamp required
royfellows

Forum: General Chat   Posted: 13/04/2015 11:33:45   Subject: New caplamp required
[quote="Tony Blair"]Roy, I am going through a bit of a change in how I operate. I've invested in some decent SRT equipment. The Trigon (which is my lamp of choice) is great. I do note that the users o
Topic: New caplamp required
royfellows

Forum: General Chat   Posted: 13/04/2015 10:42:29   Subject: New caplamp required
Oldham conversions are now discontinued bar remaining stock of Eco Stars, so its 2 dragon models or, as of today, 4 Lynx models.

I am about to announce the Lynx X2000 as a replacement for t
Topic: Copper staining (photo)
royfellows

Forum: South West England   Posted: 02/04/2015 17:19:33   Subject: Copper staining (photo)
They have all been taken in the adit. America Shaft is on the left as you go in, you can walk down into the cove and into the adit in relative safety, take a good torch. The shaft is on the left and w
Topic: Copper staining (photo)
royfellows

Forum: South West England   Posted: 02/04/2015 15:37:16   Subject: Copper staining (photo)
I was with her on that trip, its on the right hand side of the adit which is a footwall drive at that point.
If I could only find my survey!
Topic: Flooded Shaft (photo)
royfellows

Forum: South West England   Posted: 02/04/2015 15:31:24   Subject: Flooded Shaft (photo)
It is in the grounds of the hotel.
If I could find my survey it would be possible to extrapolate it to surface.
Best bet is an old map, the line of the deep adit is almost straight and follo
Topic: Wheal Hermon
royfellows

Forum: South West England   Posted: 02/04/2015 09:58:14   Subject: Wheal Hermon
I believe that adit (with a catwalk?) comes to day higher up. Not a tremendous lot to see in that mine which you will not have already found.
Topic: Wheal Margery
royfellows

Forum: New recruits!   Posted: 02/04/2015 09:49:06   Subject: Wheal Margery
The deep adit goes in from a little cove north of Porthminster Point. On the cliff top above are covered over shafts including America Shaft open underground.

The adit continues inland pass
Topic: Looking up at stopes (photo)
royfellows

Forum: South West England   Posted: 02/04/2015 09:39:55   Subject: Looking up at stopes (photo)
It doesn't look like it.
Stoping in the entrance of the adit has granite stemples, there are some small stopes further in with prominent copper staining.

Tell us more about the picture
Topic: Cambrian Mines Trust
royfellows

Forum: General Chat   Posted: 01/04/2015 08:52:31   Subject: Cambrian Mines Trust
Cwmystwyth Hydro Latest

Following a meeting with Barratt Associates on Sunday last it has been confirmed that connection issues with Scottish Power have been resolved.

Also a new
Topic: Access at Craig Y Ddinas silica mine
royfellows

Forum: South Wales   Posted: 31/03/2015 19:24:53   Subject: Access at Craig Y Ddinas silica mine
I have no intention of fitting any gates.

My approach regarding legal compliance with regard to potential public liability is to keep the surrounding fence in good order so as to provide a
Topic: Dry dark hole sought near Llanberis (Bolted up)... Its raining
royfellows

Forum: North Wales   Posted: 30/03/2015 20:25:01   Subject: Dry dark hole sought near Llanberis (Bolted up)... Its raining
Thinking about it, you dont want much do you.
Close by parking, dry, straightforward SRT, ready bolted.
You forgot the pub within 100 yds.

If you do find it, any chance of lettin
Topic: Dry dark hole sought near Llanberis (Bolted up)... Its raining
royfellows

Forum: North Wales   Posted: 30/03/2015 17:50:21   Subject: Dry dark hole sought near Llanberis (Bolted up)... Its raining
[quote="ChrisJC"]Llanberis copper mine has some nice pitches which are dry sometimes.

Chris.
[/quote]

A bit advanced as well as a climb to get there?
Topic: Underground Surveying
royfellows

Forum: Exploration Chat   Posted: 30/03/2015 17:00:25   Subject: Underground Surveying
Yea, mind made up.
I say ban and delete his threads.

Reason

Although mining relevant if he wants to advertise let him pay for it towards upkeep of the site
;D
Topic: Underground Surveying
royfellows

Forum: Exploration Chat   Posted: 30/03/2015 15:30:35   Subject: Underground Surveying
Does he contribute anything to the site?

I mean I plug my lamps, albeit under a general Q and A thread, but I think anyone who comes on here simply to post an advert should be given short s
Topic: Life of a lithium ion battery?
royfellows

Forum: Lamps & Lighting   Posted: 27/03/2015 20:55:28   Subject: Life of a lithium ion battery?
Don't mix up Lithium Ion and Lithium Ion Polymer which are different chemistries. The LiPo are ones to be careful with.
To further complicate matters there are different Lithium Ion chemistries,
Topic: What's your favourite digging tool? I've just found mine!
royfellows

Forum: General Chat   Posted: 27/03/2015 20:01:24   Subject: What's your favourite digging tool? I've just found mine!
[quote="Graigfawr"]No one's mentioned a shovelling board as being important!

My vote is for the humble 3ft x 2ft steel sheet.[/quote]

Piece of off cut from a pond liner, you know
Topic: Access to Long Rake Spa lower level?
royfellows

Forum: Midlands   Posted: 27/03/2015 10:26:33   Subject: Access to Long Rake Spa lower level?
Sounds like there has been some changes in there.

A roadside shaft opened up last year and has been infilled, so stuff is moving.
Place is ruined in my view anyway with the rock dust b
Topic: What's your favourite digging tool? I've just found mine!
royfellows

Forum: General Chat   Posted: 26/03/2015 20:46:03   Subject: What's your favourite digging tool? I've just found mine!
From my personal experience the most useless thing in the world is a conventional shovel.
I have moved tons of stuff with a gardening trowel, its a lot more effective than you would think and ca
Topic: Life of a lithium ion battery?
royfellows

Forum: Lamps & Lighting   Posted: 26/03/2015 20:33:33   Subject: Life of a lithium ion battery?
Back again
Quality cells, at least 500 discharge/ charge cycles.
One UG trip a week, 52 weeks in a year, 52 X 10 = 520 cycles
Store under cool conditions, never leave idle for long per
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