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Posts by royfellows

Showing 3818 results below:

Author Message
Topic: New 350mA driver, V useful
royfellows

Forum: Lamps & Lighting   Posted: 30/10/2014 21:52:49   Subject: New 350mA driver, V useful
At the 3 terminal (R adj) open default of 150mA running a Lynx pilot off one of my 7.8V 5200 mAh power packs!

You aught to be on the stage Chris
:lol:

Joking aside I will ru
Topic: New 350mA driver, V useful
royfellows

Forum: Lamps & Lighting   Posted: 30/10/2014 13:22:30   Subject: New 350mA driver, V useful
Unless I miss something its 350mA if R adj = about 6 ohms?

Data sheet requires quite a bit of study as I have been scratching my head over it for about 10 minutes
:lol:
Topic: New 350mA driver, V useful
royfellows

Forum: Lamps & Lighting   Posted: 30/10/2014 13:02:29   Subject: New 350mA driver, V useful
Hi fellow bat burners
Just bumped into this on Farnell
http://uk.farnell.com/on-semiconductor/nsi50150adt4g/led-driver-pwm-50v-to-252-3/dp/2382343

A 350 mA driver based on self bi
Topic: LiPo batteries
royfellows

Forum: Lamps & Lighting   Posted: 29/10/2014 12:35:22   Subject: LiPo batteries
Anyone mind if I bring this back on topic?
:lol:

Anyway, joking aside, I strongly recommend that anyone considering using LiPos do a bit of research before sticking them on the back of
Topic: 18650 Batteries
royfellows

Forum: Lamps & Lighting   Posted: 29/10/2014 09:45:11   Subject: 18650 Batteries
Out of all the 'JunkFire' brands sold on the Hong Kong sites the Trustfire 2500 mAh are possibly most 'passable'. Not 2500 mAh, more like 2200, but they do last and do what they say on the tin. I used
Topic: Ore Chute into Hangingshaw Branch Level from Proud's Sump Flat (photo)
royfellows

Forum: North West England   Posted: 14/10/2014 16:39:58   Subject: Ore Chute into Hangingshaw Branch Level from Proud's Sump Flat (photo)
[quote="davel"]
Some of us do get out of Wales from time to time, even venturing as far as Nenthead on occasion. ;D

Would you believe that a couple of us had a Middleclough to Smallcle
Topic: mine explorer website and a new mine to explore
royfellows

Forum: North Wales   Posted: 09/10/2014 11:18:47   Subject: mine explorer website and a new mine to explore
Caving Gear was having similar problems but now appears to be back on line.
In all fairness to an extremely buisy and good man, I think Miles should make a statement on the situation.
Topic: Browns Folly
royfellows

Forum: South West England   Posted: 07/10/2014 16:55:49   Subject: Browns Folly
[quote="Popeass1"]Brian deserves a medal for all the work he does down there to keep the history alive.
I'll pass on your gratitude to him when I speak to him next.:thumbup:[/quote]

Me
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 07/10/2014 16:48:14   Subject: Fellows lamps forum.
Lynx X5000 latest.

I have dumped the external switches in favour of the integrated Knitter waterproof switches fitted to the X3000, so the lamp looks the same as that one except for having
Topic: Browns Folly
royfellows

Forum: South West England   Posted: 05/10/2014 21:59:26   Subject: Browns Folly
[quote="crickleymal"]Had a pleasant trip to Browns this Saturday. We did a circular route taking in Clapham Junction, the ferret cage, the stables and the truck. Hats off to whoever has cleaned up the
Topic: Stanhopeburn Mine (photo)
royfellows

Forum: North East England   Posted: 05/10/2014 12:54:09   Subject: Stanhopeburn Mine (photo)
[quote="legendrider"]Cambokeels???? :confused:

Photograph:

[link]Stanhopeburn-Fluorite-Mine-Archive-Album-Image-006[linkphoto]Stanhopeburn-Fluorite-Mine-Archive-Album-Image-006[/
Topic: Oldham GL16 Lamps and Li Ion batteries
royfellows

Forum: Lamps & Lighting   Posted: 30/09/2014 14:34:09   Subject: Oldham GL16 Lamps and Li Ion batteries
[quote="Lecko"]

BUT, in all my years of working as a mining electrician, I never saw AN Oldham battery last more than four years [b]in full service.[/b] We were lucky to see two years of go
Topic: Box Back Door Locked
royfellows

Forum: South West England   Posted: 30/09/2014 11:36:59   Subject: Box Back Door Locked
Are the incidents being referred to the ones which lead up to the original gating or have there been more recent ones?
Topic: How dangerous is mine exploration?
royfellows

Forum: General Chat   Posted: 29/09/2014 19:09:21   Subject: How dangerous is mine exploration?
[quote="Graigfawr"]Descent magazine has published annual summaries for about 20 years with a short narrative for each call out.

The summaries include all mine exploration call outs. Caving
Topic: Box Back Door Locked
royfellows

Forum: South West England   Posted: 29/09/2014 15:37:56   Subject: Box Back Door Locked
Everyone making assumptions.

In the event that the locks were fitted by some one who had no authority to do so then they would constitute a 'Private nuisance' to anyone else who had a right
Topic: Oldham GL16 Lamps and Li Ion batteries
royfellows

Forum: Lamps & Lighting   Posted: 28/09/2014 18:55:21   Subject: Oldham GL16 Lamps and Li Ion batteries
[quote="Lecko"] But 40 years off of a lead acid battery???? Come on, that's a fairy tale!!
My Tech College teachers would be rolling around on the floor over that one...
[/quote]

Topic: Oldham GL16 Lamps and Li Ion batteries
royfellows

Forum: Lamps & Lighting   Posted: 28/09/2014 16:49:02   Subject: Oldham GL16 Lamps and Li Ion batteries
[quote="wheldale"]Back on topic, what is the life span of a li-ion lamp compared to a lead acid lamp?[/quote]

You will get opinions on this rather than facts, and this will be the best anyo
Topic: Pantywrach Mine
royfellows

Forum: North Wales   Posted: 19/09/2014 17:27:53   Subject: Pantywrach Mine
Yes, in a fall. This comes down from the winze/understope at the end of the upper adit. I dropped this on SRT once, horrifically dangerous hanging deads, and no way into the DA at the bottom. Shortly
Topic: Pantywrach Mine
royfellows

Forum: North Wales   Posted: 18/09/2014 22:25:35   Subject: Pantywrach Mine
[quote="Rheidol United"]Thanks for the info - yes I have a lot to learn about those mines! I also went to Bwlchyplwm and Catherine & Jane - some interesting adits at C&J, and spectacular views and ope
Topic: Oldham GL16 Lamps and Li Ion batteries
royfellows

Forum: Lamps & Lighting   Posted: 18/09/2014 09:28:51   Subject: Oldham GL16 Lamps and Li Ion batteries
[quote="exspelio"]Doesn't answer my question Roy.[/quote]

I am sorry about this, maybe I should have been a politician, missed my vocation in life.
New Stuff has explained it very well
Topic: Oldham GL16 Lamps and Li Ion batteries
royfellows

Forum: Lamps & Lighting   Posted: 17/09/2014 22:57:18   Subject: Oldham GL16 Lamps and Li Ion batteries
Be careful charging Li Ion batteries, or keep a good fire extinguisher handy. Lead acid chargers are entirely unsuitable and some of the chargers supplied with Chinese Li Ion are not suitable either a
Topic: Pantywrach Mine
royfellows

Forum: North Wales   Posted: 17/09/2014 22:50:09   Subject: Pantywrach Mine
[quote="Rheidol United"]Hi all
I was walking along the lane from Penrhyndeudraeth to Rhiwgoch farm a few days ago, and came across a few adits. At SH62044013 were two adits, one was only a few fe
Topic: Oldham charger prices
royfellows

Forum: Lamps & Lighting   Posted: 17/09/2014 09:40:11   Subject: Oldham charger prices
Mr Lecko, thanks for this. Its now making sense.
Do you know anything about the construction of the T2 battery?

Holding one up to the light it appears to have 4 cells rather than 2, we
Topic: Oldham charger prices
royfellows

Forum: Lamps & Lighting   Posted: 16/09/2014 21:37:18   Subject: Oldham charger prices
But in the old days of Ts and the virtually indestructable but slightly heavier T2 you got away with it. Treat a T6 like that and it wont last 12 months.

And Chris, someone will correct me
Topic: Oldham charger prices
royfellows

Forum: Lamps & Lighting   Posted: 16/09/2014 18:25:10   Subject: Oldham charger prices
[quote="ChrisJC"]Charging from 5V? what sort of cells are they?, or is there a charging circuit built in? I know of no cell chemistries for which 5V is the perfect charging voltage.

Chris.<
Topic: Oldham charger prices
royfellows

Forum: Lamps & Lighting   Posted: 16/09/2014 15:39:13   Subject: Oldham charger prices
[quote="SimonRL"][quote="royfellows"]I wore an Oldham on saturday at Pumsaint, it was a blast from the past.[/quote]

Were the guides using their new H2s?[/quote]

There was only o
Topic: Oldham charger prices
royfellows

Forum: Lamps & Lighting   Posted: 16/09/2014 09:28:06   Subject: Oldham charger prices
I wore an Oldham on saturday at Pumsaint, it was a blast from the past.
Actually, never switched it on
Had a dive lamp version of an X5000 in my hand with its fag packet size 12V 5.2 AH Lith
Topic: Autonomous headlamp design enquiry
royfellows

Forum: Lamps & Lighting   Posted: 15/09/2014 16:10:38   Subject: Autonomous headlamp design enquiry
[quote="Peter Burgess"]If you improve the lamp efficiency too much, people will forget how to charge up the batteries.[/quote]

Go away
:lol:
Topic: Autonomous headlamp design enquiry
royfellows

Forum: Lamps & Lighting   Posted: 15/09/2014 14:06:11   Subject: Autonomous headlamp design enquiry
Fellows Lamp Mission Statement

Do continuously strive to produce lamps that are more efficient so as to provide exceptional performance combined with a reasonable weight and smaller lighter
Topic: Autonomous headlamp design enquiry
royfellows

Forum: Lamps & Lighting   Posted: 15/09/2014 12:15:27   Subject: Autonomous headlamp design enquiry
The problem is that if you take away the necessity for people to think and make decisions they will entually loose the ability to do so.

Keep dumbing everything down and eventually we all b
Topic: Autonomous headlamp design enquiry
royfellows

Forum: Lamps & Lighting   Posted: 15/09/2014 11:28:03   Subject: Autonomous headlamp design enquiry
Never in 1000 years will technology ever be a substitute for the human brain, all it will achive is to make a nuisance of itself in the attempt.

I have not always thought like this, I was o
Topic: Vanoord's a Joke
royfellows

Forum: General Chat   Posted: 12/09/2014 09:59:50   Subject: Vanoord's a Joke
[quote="Mr Mike"][quote="royfellows"]From 1960s spy movie:

"I need to know what the Chinese are planning"

A: They going to flood the country with cheap LED torches and bike light
Topic: Vanoord's a Joke
royfellows

Forum: General Chat   Posted: 11/09/2014 21:47:36   Subject: Vanoord's a Joke
From 1960s spy movie:

"I need to know what the Chinese are planning"

A: They going to flood the country with cheap LED torches and bike lights
:lol:
Topic: Its here! A Chinese Scurrion Clone
royfellows

Forum: Lamps & Lighting   Posted: 09/09/2014 18:52:52   Subject: Its here! A Chinese Scurrion Clone
[quote="Tamarmole"]Looks very interesting and the price is tempting at around £130 - £140.

Concerns include the flashy modes and, more importantly, after sales support.

IP 6
Topic: Its here! A Chinese Scurrion Clone
royfellows

Forum: Lamps & Lighting   Posted: 09/09/2014 10:08:59   Subject: Its here! A Chinese Scurrion Clone
Well I knew that eventually it would happen, I also knew that in so producing this they would manage to shoot themselves in the foot at the same time, and they haven’t let me down.

First I
Topic: Autonomous headlamp design enquiry
royfellows

Forum: Lamps & Lighting   Posted: 08/09/2014 22:19:56   Subject: Autonomous headlamp design enquiry
Rick, tomorrow I will open a new thread, late now.
Topic: Autonomous headlamp design enquiry
royfellows

Forum: Lamps & Lighting   Posted: 08/09/2014 20:59:35   Subject: Autonomous headlamp design enquiry
[quote="rufenig"]Auto adjustment and playing with colour temp will attract a few (all be it vocal) players.
Hundreds of lumens are usefull for about 1% of underground work.
What the vast maj
Topic: New member - Notts-Derbyshire
royfellows

Forum: New recruits!   Posted: 08/09/2014 13:34:02   Subject: New member - Notts-Derbyshire
Get "Caves of the Peak District" pub by Dalesman.

Try moorbooks for it

Worth every penny.
Topic: anyone identify this
royfellows

Forum: General Chat   Posted: 05/09/2014 14:09:33   Subject: anyone identify this
Its possible that it may have been part of something taken into the mine but not related to mining.
Topic: Paul Deakin RIP
royfellows

Forum: Midlands   Posted: 04/09/2014 21:36:57   Subject: Paul Deakin RIP
Oh no!
This makes me very sad.
Topic: Carbis bay mine shafts
royfellows

Forum: South West England   Posted: 04/09/2014 15:57:47   Subject: Carbis bay mine shafts
Thanks for this.

Have you turned up anything in your surface mooching?

There is a 'feature' along side the main road at the bottom of Godrevey Terrace, not the one in St Ives its
Topic: Carbis bay mine shafts
royfellows

Forum: South West England   Posted: 04/09/2014 10:21:34   Subject: Carbis bay mine shafts
A lovely posting Stu. Is says a lot.

I have a personal fascination with the area and keep returning time after time.
Topic: boundary cross flatts collapse - rampgill
royfellows

Forum: North West England   Posted: 02/09/2014 12:15:48   Subject: boundary cross flatts collapse - rampgill
[quote="SimonRL"]Thank you Mr Mike. A good factual write up and warning for future groups of where to be aware. Much appreciated.[/quote]

Yes I second that.
Good to get the facts, exac
Topic: Vanoord's a Joke
royfellows

Forum: General Chat   Posted: 28/08/2014 22:08:31   Subject: Vanoord's a Joke
[quote="Digit"]A young man married a beautiful woman who had previously divorced ten husbands. On their wedding night, she told her husband, "Please be gentle; I'm still a virgin".

"What?"
Topic: Looking for lecturer
royfellows

Forum: General Chat   Posted: 28/08/2014 16:39:12   Subject: Looking for lecturer
[quote="CIMT"]it is not a conference meeting. we just need anyone could give a talk to the delegations. I have been contact BGS and Exeter Uni, however they told me they couldn't do it. Just wonderin
Topic: Looking for lecturer
royfellows

Forum: General Chat   Posted: 28/08/2014 14:48:24   Subject: Looking for lecturer
[quote="Drillbilly."]

By the way, you'd better tell your chums that powerful vacuum cleaners have been banned by our glorious leaders:-

http://www.bbc.co.uk/news/business-2887843
Topic: Looking for lecturer
royfellows

Forum: General Chat   Posted: 27/08/2014 22:29:56   Subject: Looking for lecturer
[quote="exspelio"][quote="Drillbilly."]I can come along and give a lecture in response to your key points.

The lecture will be delivered in 2 parts.

Part 1. Health and Safety s
Topic: Old Gang Smelt Mill: Shaking table
royfellows

Forum: North East England   Posted: 27/08/2014 09:51:32   Subject: Old Gang Smelt Mill: Shaking table
Hi People

A few weeks ago while walking in Swaledale with a companion we stopped to have a wonder around the Old Gang Smelt Mill. My companion’s interest was aroused by the shaking table in
Topic: Fellows lamps forum.
royfellows

Forum: Lamps & Lighting   Posted: 25/08/2014 14:36:21   Subject: Fellows lamps forum.
More new stuff

A new version of the popular EcoStar lamp incorporates some new features.

XM-L U2 Emitter, walk mode now 200 lumens for average 1.3 watts battery hit.

T
Topic: Access to mines under the CRoW Act
royfellows

Forum: General Chat   Posted: 22/08/2014 12:51:57   Subject: Access to mines under the CRoW Act
[quote="Drillbilly."]I'm liking your signature line! :lol:[/quote]

Thought you might!
And I am liking your:

[i]"I think people trying to get holes included in the CRoW are s
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