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Member postings for Michael Gilligan

Here is a list of all the postings Michael Gilligan has made in our forums. Click on a thread name to jump to the thread.

Thread: Calculator App
16/01/2022 15:15:58

If you have an iPad, Derek … This one is excellent: **LINK**

https://apps.apple.com/gb/app/fraction-calculator-plus-pro/id504494723

MichaelG.

Thread: Replace Speaker Surrounds
16/01/2022 09:44:27

Lots of excellent points there, John yes

I would just add, if I may, that there are two ‘generic’ advantages to valve amplifiers:

  1. The distortion comprises mostly even harmonics
  2. In overload the waveform is ‘softened’ rather than clipped.

The best-sounding transistor amplifiers are, I would suggest, the ones which best-approximate those characteristics.

MichaelG.

Thread: That Strange Calculator Again
15/01/2022 18:40:11
Posted by Calum Galleitch on 15/01/2022 18:16:08:

[…]

So was something inserted in those holes

.

From the previous discussion : The dimensions are ~5.125" X 5.125" X .375".

… so my assumption was … a finger-tip

MichaelG.

.

Ref. post by Charles Dunham :

 https://www.model-engineer.co.uk/forums/postings.asp?th=171761&p=2

Edited By Michael Gilligan on 15/01/2022 18:45:39

Thread: To start the discussion
14/01/2022 23:55:13
Posted by Zan on 14/01/2022 12:54:49:

I’d like to look at this, but don’t like the cookies. Too many

.

I saw it originally on the Apple News feed, but some folks don’t like links to that: so I found the CNN page to link here.

It didn’t take me long to reject all the ‘optional’ cookies.

MichaelG.

.

https://apple.news/AF7bHa1OHRTCYo3Yy_d6gWQ

for those with the appropriate device.

Edited By Michael Gilligan on 14/01/2022 23:58:14

Thread: Replace Speaker Surrounds
14/01/2022 23:23:24

That looks rather stylish, Neil yes

I grabbed the Mission 760 pair because they were the right size for the current living room.

… The KefKit 3 pair that I built in the 70s take up a lot of space, and the bass goes lower than the room eigentones.

sad MichaelG.

14/01/2022 19:39:26

A noble and interesting exercise, Neil ... and they presumably have sentimental value

But [ dare I mention ? ] last week, I bought a pair of Mission 760 speakers [in pretty fair condition] from the local Charity Shop for the paltry sum of £5

MichaelG.

Thread: Model Engineering Website
14/01/2022 18:45:06
Posted by DMB on 14/01/2022 14:10:20:

Dave and Michael, just clicked link provided by you both and it still comes up stuffed with rubbish.

I'm using a Samsung tablet and Android, Google used to search for most things.

That site is the only one found this week with rubbish on it, like it's been attacked by the lowlife. As previous, AVG says that there are no issues with my tablet, so I can only think it's something at David Goyders end?

John

.

Sorry to disappoint you, John … but I have just tried the link on my shiny new ‘dirt cheap smartphone’ [ Alcatel 1S running Android 11 ] and everything seems fine; so I can’t understand how a problem with the website can be affecting only your tablet.

sad

MichaelG.

Thread: How can I bond ABS (plastic) to NRL (rubber)?
14/01/2022 18:01:10

Double-sided tape [as used by carpet-fitters] might do the job neatly.

… but, of course, it has zero working-time, so you would need to get positioning ‘right first time’

MichaelG.

Thread: Ba 2 castellated locking nut
14/01/2022 13:29:56
Posted by Nigel Graham 2 on 14/01/2022 12:58:47:

I looked at that site, Michael, but does it sell small numbers to private buyers? It looks trade-only, wanting 2000, not 2.

.

I have no knowledge of that, Nigel … I was mainly pointing-out that the same item might go by various names.

MichaelG.

Thread: To start the discussion
14/01/2022 12:44:40

… But did you get down to the Camel racing, Dave ?

[ several interesting topics on the way ]

MichaelG.

Thread: Ba 2 castellated locking nut
14/01/2022 12:37:17

By another name … **LINK**

https://nenutsboltsfasteners.co.uk/product/2ba-slotted-nut/

MichaelG.

.

Crossed posts in the æther !!

Edited By Michael Gilligan on 14/01/2022 12:41:42

Thread: That Strange Calculator Again
14/01/2022 12:28:14
Posted by Nigel Graham 2 on 14/01/2022 11:48:52:

[…]

That Science Museum search, I am afraid, was very frustrating by its own web-site; of a standard I regard too low for a national Science Museum! It uses a filter system as in major retailers' catalogues, but it is very rough, its date-choice system largely meaningless, and can take only one criterion before switching back to the list.

[…]

.

Very sad, isn’t it !?!

Reverting to first principles … Has anyone worked-out why the maker felt it necessary to include the tabulation of the obvious [sixteen times table] at the bottom-right corner ?

MichaelG.

 

Edited By Michael Gilligan on 14/01/2022 12:28:42

Thread: Model Engineering Website
14/01/2022 12:00:15

Posted by SillyOldDuffer on 14/01/2022 11:02:21:

[…]

I'm browsing this link

.

… which is working fine on my iPad yes

MichaelG.

Thread: To start the discussion
14/01/2022 11:55:39

I am posting this News item without comment:

Technology is rapidly changing our lives, and that applies to sport as much as anywhere else. For example, RoboCup is a soccer competition for autonomous robots, watched by tens of thousands of spectators. …

**LINK**

https://edition.cnn.com/2022/01/14/sport/gallery/high-tech-sports-spc-intl/index.html

MichaelG.

Thread: Pratt No. 58 5" 3-jaw stuck backplate
13/01/2022 08:30:15

I would first remove the screws, clean the joint-line and apply ‘dismantling fluid’ in small quantities … allowing it to gently seep in.

Next day … I would take a nylon-faced ‘dead blow hammer’ to it : hitting radially at many points around the circumference. This should open the joint sufficiently to apply more fluid and give it another beating [et seq]

MichaelG.

Thread: Engineering as Art
12/01/2022 23:50:21
Posted by SillyOldDuffer on 12/01/2022 22:28:56:

[…]

When plotters first appeared, memory was small and expensive, so simplicity ruled: lines would be drawn in the order received.

[…]

.

Whilst I wouldn’t dream of doubting your word on the matter, Dave … I would just mention that my experience with Autocad and a Roland plotter dates back to when Autocad was shipped on thirteen floppy disks, and we ran it on an Olivetti M24 8086 desktop PC.

The plotter skipped around [just like the ones in the HP and Roland videos] when plotting Columbia.hpgl

By your logic therefore … it appears that was already in the ‘more powerful’ sector.

MichaelG.

.

Edit: __ See the legendary Columbia image at the bottom of this page:

https://www.fourmilab.ch/autofile/e5/chapter2_19.html

Edited By Michael Gilligan on 13/01/2022 00:08:15

Thread: Are standard "M4" nuts & bolts normally fine or course pitch?
12/01/2022 23:31:38

Good ol’ Wikipedia puts it thus:

[quote] A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter) and the pitch P, both expressed in millimetres and separated by the multiplication sign, × (e.g., M8×1.25). If the pitch is the normally used "coarse" pitch listed in ISO 261 or ISO 262, it can be omitted (e.g., M8).[4]: 17  [/quote]

Which is a slightly convoluted way of confirming that if you just buy M4 it will [or at least should] always be coarse thread.

MichaelG.

Ref. https://en.wikipedia.org/wiki/ISO_metric_screw_thread#Preferred_sizes : **LINK**

Thread: Engineering as Art
12/01/2022 20:35:42

Not for anything but the joy of reminiscing: **LINK**

https://youtu.be/Tr7Mbw9gLpk

HP 7475A Plotter and HPGL Demo

MichaelG.

Thread: 5 inch Lion (Titfield Thunderbolt) Boiler top
12/01/2022 20:22:29

Thanks, Duncan

… probably best if I stick to microscopes & stuff blush

MichaelG.

Thread: Meddings pillar drill value
12/01/2022 19:57:58
Posted by Mark Rand on 12/01/2022 19:20:50:

I would say that £700 is too much, but then a new Meddings LB1 is about £2,500 so maybe inflation has caught up with me and passed me by.

.

I would probably agree, Mark … but having seen opening question as a simple either/or choice, I responded accordingly.

The discussion broadened somewhat after that.

MichaelG.

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