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Posts by Andy Mears

Showing 51 results below:

Author Message
Topic: postage costs rising
Andy Mears

Forum: General Chat   Posted: 02/12/2020 14:21:34   Subject: postage costs rising
And it's amazing what you can get off e-bay for 99p including delivery
Topic: Roman/Ancient Mines! Request for sites
Andy Mears

Forum: Mining Heritage   Posted: 25/11/2020 21:08:11   Subject: Roman/Ancient Mines! Request for sites
There was certainly a fair amount of Roman ironworking around Corby, Northants, with recent excavations carried out on the Priors Hall development.
If you google Roman ironworking Corby you'll f
Topic: One for car enthusiasts
Andy Mears

Forum: General Chat   Posted: 19/10/2020 22:43:03   Subject: One for car enthusiasts
Just finished the rebuild on a galvanised chassis on the 110 that I bought off Miles. I'd strongly recommend using electrical insulation between dissimilar metals to deal with electrolytic corrosion.
Topic: One for car enthusiasts
Andy Mears

Forum: General Chat   Posted: 18/10/2020 18:53:31   Subject: One for car enthusiasts
Landrovers don't leak oil - they mark their territory.
Topic: Hidden BBC Wales Drama
Andy Mears

Forum: North Wales   Posted: 08/10/2020 11:37:03   Subject: Hidden BBC Wales Drama
The viaduct at the end looks very much like Cwm Prysor - anyone agree?
Topic: 3W Cree torches in Tesco's
Andy Mears

Forum: Lamps & Lighting   Posted: 20/02/2020 22:37:05   Subject: 3W Cree torches in Tesco's
Years ago, when I was an electrical apprentice, I was working with an electrician, fault finding on a panel. He suddenly realized that the coil of one of the contactors was probably open circuit, and
Topic: Proposal to revive Cumbrian coal mining
Andy Mears

Forum: North West England   Posted: 08/11/2019 11:35:59   Subject: Proposal to revive Cumbrian coal mining
When we had steelmaking at Corby, we had a couple of electric arc furnaces, as well as the blast furnaces . The arc furnaces didn't reduce ore, but used scrap as the feed material. This was heavy scra
Topic: Electrical Engineer Help Needed!
Andy Mears

Forum: General Chat   Posted: 30/05/2019 19:55:25   Subject: Electrical Engineer Help Needed!
I would say the small terminals are the field, and it's getting hot because with no regulator you're putting the full output (from your lamp experiment probably over 100v with no regulator) across a 2
Topic: Li thium Ion Battery digest
Andy Mears

Forum: South Wales   Posted: 23/09/2018 10:53:42   Subject: Li thium Ion Battery digest
Presumably the "below 0v" refers to cells in series, when one cell becomes discharged before the others, and becomes reverse charged as a result. Wouldn't fancy trying to sort suitable protection for
Topic: Stenlight question
Andy Mears

Forum: Lamps & Lighting   Posted: 26/04/2018 13:21:22   Subject: Stenlight question
Hence the term "idiot diode" fitted across the power rails to pop the fuse when said event occurs. I had a mate who used to repair a lot of CB radios. When he got one where they had put the foil out o
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 05/03/2018 10:05:50   Subject: Land Rovers for Sale!
You have PM
Regards Andy
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 02/03/2018 14:16:40   Subject: Land Rovers for Sale!
Yes, you did get a good choice of albeit overlapping ratios. Reminds me of a chap I worked with a few years back. Ran a Lotus Europa - Renault engined. He worked out that a Renault TX engine would go
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 02/03/2018 12:33:57   Subject: Land Rovers for Sale!
The first engine swap I did was in a 2a in 1979 during the steel strike. There weren't many alternatives then - mainly 4-203 Perkins or BMC diesel. I sourced a BMC 3.4 litre from a Leyland Terrier tru
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 02/03/2018 11:35:54   Subject: Land Rovers for Sale!
I've got a late 2a with a 200TDI in. You need to get the gear ratio up a bit, either with a diff swap or overdrive. The splines on Bearmach units are a lot more substantial than Fairey units. I've had
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 02/03/2018 09:31:11   Subject: Land Rovers for Sale!
PM sent
Regards Andy
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 01/03/2018 11:13:05   Subject: Land Rovers for Sale!
You have a P.M.
Regards Andy
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 27/02/2018 18:57:09   Subject: Land Rovers for Sale!
You have another PM
Regards Andy
Topic: Land Rovers for Sale!
Andy Mears

Forum: For Sale! (and wanted / for swap)   Posted: 27/02/2018 17:50:07   Subject: Land Rovers for Sale!
You have a P.M.
Regards Andy
Topic: Fellows lamps forum.
Andy Mears

Forum: Lamps & Lighting   Posted: 29/01/2018 22:49:55   Subject: Fellows lamps forum.
Do you find some of RS's packaging solutions rather interesting at the moment. Last month, I'd ordered five isolated mosfet gate driver chips.
Next day this huge package arrived about the size o
Topic: Battery charging warning
Andy Mears

Forum: Lamps & Lighting   Posted: 26/12/2017 19:32:19   Subject: Battery charging warning
Certainly right about the electrolyte - potassium hydroxide, also known as caustic potash and very similar to caustic soda - not the most user friendly of materials.
Topic: Battery charging warning
Andy Mears

Forum: Lamps & Lighting   Posted: 26/12/2017 15:32:23   Subject: Battery charging warning
The most "bomb proof" batteries I've come across are flooded cell nickel cadmium. We used some that had been stood nearly 20 years untouched and they took a charge and worked fine. They were so low vo
Topic: Electic Dumper
Andy Mears

Forum: Mining Methods & Techniques   Posted: 23/09/2017 16:40:28   Subject: Electic Dumper
When you think about it they have to get rid of the surplus energy from regenerative braking somewhere. If you just keep putting it into a now fully charged battery you soon end up with a very expensi
Topic: Industrial Relics on Film
Andy Mears

Forum: General Chat   Posted: 12/09/2017 22:55:41   Subject: Industrial Relics on Film
The best way to "properly" create 3 phases from a single phase supply is with an inverter. Many of the inverters used for speed control up to a few kilowatts accept a single phase input and produce tr
Topic: Shaft Camera Recommendation ?
Andy Mears

Forum: Underground Photography & Video   Posted: 22/06/2017 13:37:07   Subject: Shaft Camera Recommendation ?
Hi, I have used a Runcam - I think I paid just under £70 off E_Bay on a drone. Brilliant bit of kit - very good resolution. Also very easy to use a radio link for live video.
Regards Andy
Topic: Attaching a lamp bracket
Andy Mears

Forum: General Chat   Posted: 07/02/2017 23:13:33   Subject: Attaching a lamp bracket
Also if the helmet is being worn when you use the hilti gun, it can make the helmet difficult to remove.
Topic: Oldham charger frames
Andy Mears

Forum: General Chat   Posted: 16/11/2016 22:44:33   Subject: Oldham charger frames
It looks pretty simple to construct to me. I'd have thought any local fabrication shop would do them for a lot less (I'd have thought about £100 a pair). If not look for unistrut on E-Bay.
Rega
Topic: Torches at Aldi
Andy Mears

Forum: General Chat   Posted: 30/09/2016 23:02:45   Subject: Torches at Aldi
I've got a couple of their 3x"C" cell torches which have been very good. I did look at a rechargeable one in there a couple of months back but found it proudly stating "weather proof to IP20"!
Topic: There's someone there... (photo)
Andy Mears

Forum: North East England   Posted: 05/09/2016 22:24:09   Subject: There's someone there... (photo)
Reminds me of a story a gas engineer told me when we were sorting some reheat furnaces. He had been doing work on kilns for Baggeridge Brick. The workers from one of the sites wouldn't go near the oth
Topic: Tin back on the agenda
Andy Mears

Forum: Midlands   Posted: 04/06/2016 22:53:43   Subject: Tin back on the agenda
Sounds like injector pressure / spray pattern to me - I've got a test pump and go to Barmouth regularly if of any help.
Regards Andy
Topic: Exploring surface features
Andy Mears

Forum: North Wales   Posted: 28/03/2016 11:43:53   Subject: Exploring surface features
Hi Dave, we are usually over at Barmouth in the school holidays, and had investigated the mines and trials up the path to Gelfechan farm. Using the search facility as you describe shows a lot more tha
Topic: Exploring surface features
Andy Mears

Forum: North Wales   Posted: 27/03/2016 21:15:09   Subject: Exploring surface features
Hi all, I'm in Barmouth area for a week commencing 1/4/2016 with the family, and like the idea of exploring some of the surface features (with wife and kids). Cwm Ciprwth looks very interesting and ex
Topic: Super power battery bargain
Andy Mears

Forum: General Chat   Posted: 04/03/2016 22:07:07   Subject: Super power battery bargain
I think I'd probably go for the simple, primitive solution of using filament lamps as the load - they are not bad as a crude way of drawing a fairly constant current. When you think about it as the vo
Topic: Super torch, biggest lie yet!
Andy Mears

Forum: Lamps & Lighting   Posted: 21/02/2016 22:47:17   Subject: Super torch, biggest lie yet!
I've had people ring me up hawking solar panels with claims of generated output about as believable. Perhaps if Roy mounted one of these on your helmet as well so the lamp shone on it you could do awa
Topic: Ransom and Rapier W1400 at Priors Haw (photo)
Andy Mears

Forum: Mining Heritage   Posted: 05/02/2016 20:39:06   Subject: Ransom and Rapier W1400 at Priors Haw (photo)
I've just put the Shotley quarry on the site and uploaded a picture of Sundew - the machine that was walked there from Exton. The talk around here at the time was that one of the reasons for walking
Topic: Ransom and Rapier W1400 at Priors Haw (photo)
Andy Mears

Forum: Mining Heritage   Posted: 03/02/2016 19:24:10   Subject: Ransom and Rapier W1400 at Priors Haw (photo)
Hi, I believe the Bucyrus 1150b from Brookfield Cottage quarry was successfully re-commissioned in America. One of the W1400 machines was dismantled (but from what I saw was more like demolished) and
Topic: Wanted Gear of special type
Andy Mears

Forum: General Chat   Posted: 22/01/2016 23:22:39   Subject: Wanted Gear of special type
The tensile test machine I worked on at Tata Steel used a lead screw arrangement. If you're motorising it that might be worth considering.
Regards Andy
Topic: Exploitation of Child Miners
Andy Mears

Forum: Rest of World   Posted: 20/01/2016 16:33:15   Subject: Exploitation of Child Miners
I know this is getting a bit off topic but thought it interesting that the scrap value of lithium batteries is minimal. I'd always assumed that the materials made up a lot of the price, hence it would
Topic: Old gold mines
Andy Mears

Forum: Midlands   Posted: 24/12/2015 14:16:07   Subject: Old gold mines
Hi, it looks as if one has sprung (or is in the process of springing up) at Gwynfynydd as well. I assumed the scheme referred to was the one at Vigra bridge. Very interesting piece on Dave's website.
Topic: Old gold mines
Andy Mears

Forum: Midlands   Posted: 24/12/2015 09:39:07   Subject: Old gold mines
I think you'll find the one with the hydro scheme nearby is Clogau - unless one has sprung up lately near Gwynfynydd.
Topic: Sad day.
Andy Mears

Forum: General Chat   Posted: 21/12/2015 12:26:17   Subject: Sad day.
On the boiler efficiency front a modern boiler claiming 94% efficiency will be 94% NET efficiency when operating in condensing mode.
NET efficiency is percentage of net calorific value (about 10%
Topic: recommend me a caving club
Andy Mears

Forum: North Wales   Posted: 14/12/2015 16:57:11   Subject: recommend me a caving club
On the acronyms, some of our managers, having returned from a course were keen to implement a J.I.T. (just in time) supply chain. It's success can be judged by it quickly being known as JTFL -(Just To
Topic: Any Ideas?
Andy Mears

Forum: General Chat   Posted: 08/12/2015 22:56:16   Subject: Any Ideas?
The B.O.V. tanks we had at Corby were just mild steel. I thought this was odd at the time, but was informed that B.O.V. isn't too bad in that state - it actually gets much more corrosive to steel when
Topic: Any Ideas?
Andy Mears

Forum: General Chat   Posted: 08/12/2015 10:38:20   Subject: Any Ideas?
We used to use sulphuric acid to "pickle" steel tubes to remove the mill scale prior to galvanising. The strong acid which was diluted to make the pickle acid was referred to as brown oil of vitriol o
Topic: Walkie talkie for climbing
Andy Mears

Forum: General Chat   Posted: 02/12/2015 15:01:13   Subject: Walkie talkie for climbing
With this on the subject of radio communication in awkward places, something I've used before on industrial telemetry links (450Mhz)where we didn't have line of sight due to a hill was a couple of aer
Topic: DIY carbide lamp
Andy Mears

Forum: Lamps & Lighting   Posted: 16/10/2015 22:45:35   Subject: DIY carbide lamp
Doesn't that look like a bit of copper tube ?
If you pass acetylene through copper you get Copper Acetylide formed which is a contact high explosive.- Not a good idea to accidentally make your o
Topic: Oxygen detector
Andy Mears

Forum: Exploration Chat   Posted: 22/08/2015 17:28:02   Subject: Oxygen detector
The combustion analyser we used at Tata Steel (a Land Combustion product) used a sensor manufactured by City Technology. I know the Land engineers reckoned many oxygen analysers used their sensors. If
Topic: Oxygen detector
Andy Mears

Forum: Exploration Chat   Posted: 19/08/2015 08:44:07   Subject: Oxygen detector
A couple of years ago I was doing some maintenance work on a 40Mw gas furnace at Tata Steel in Corby. The control valves and thermocouple cables we were working on are located in tunnels below the fur
Topic: Right, own up!
Andy Mears

Forum: General Chat   Posted: 24/07/2015 11:40:22   Subject: Right, own up!
When we had a galvanising line at British Steel in Corby, even a fairly small acid spill would make the dissolved iron in the effluent stream from the site precipitate out looking just like this. The
Topic: Cree 5W LED torch at Aldi
Andy Mears

Forum: General Chat   Posted: 13/02/2014 21:43:27   Subject: Cree 5W LED torch at Aldi
Hi, just been down to our local Aldi and they've reduced these to £14.99. They say 10w and 490Lm with protection at IP65
(so total dust, water jets, but not submersible).
Very bright - I'm
Topic: Maenofferen
Andy Mears

Forum: General Chat   Posted: 12/02/2014 21:47:22   Subject: Maenofferen
The liquid resistance they used on the steel rolling mills at Corby -it added rotor resistance to the motor of a motor generator set (Ilgner set) when an ingot went through the mill so energy was supp
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