Here is a list of all the postings Geoff Theasby has made in our forums. Click on a thread name to jump to the thread.
|Thread: A New Golden Age of Model Engineering Exhibitions|
A few years ago the Makers shared with M. E. at Sandown Park. I gather that they grew so fast they now have their own show.
Several groups now hold shows at 2-year intervals. Manchester in Feb 2019!
|Thread: A question for Thomas the Tank Engine fans|
Frances, the UK road sign for a level crossing is still the silhouette of a steam locomotive.
|Thread: Beer and Grapefruit|
Long term strong lager drinker here. However, I do like Speckled Hen, Abbotts Ale, Bishops Finger, and, of course, Old Peculier and Taylors Landlord. Something I can wrap my tongue round.
I don't like cold beer, it gives me brain freeze and takes away the taste.
|Thread: Never Throw Anything Away|
My wife suspects I'm a hoarder, but when I refer to her stash of knitting wool she goes all coy...
|Thread: LED lighting|
Yes, the sticky LED strips do work, I use them a lot. In a harsh environment, put them in a clear plastic tube for protection.
I just fitted LED lighting in my garage, using a 12 volt 'wall wart' and two LED panels intended for use in car interiors, a couple of quid each from Amazon.
|Thread: Is Model Engineering in Decline|
I did meet a duke once, opening an event I was attending. Old tweed jacket, baggy trousers, apologised for looking like a gardener...
|Thread: Are Model Engineering Exhibitions The Same|
Mark Rand, why is it 'obvious' that people should move right to left at exhibitions? I like to move clockwise round a show or rally, as do most others, as you said. Are you the only one in step?
|Thread: Let's hear it for British manufacturing!|
Where do I start? Special steels, Airbus wings, Honda/Nissan/Toyota, AMRC, medical joints/scalpels, JLR, ARM microprocessors, electronic games, <pause for breath>
|Thread: Neil's Irrelevant Press Release Thread|
Not to mention loud exhausts, go-faster stripes and an aggressive look...
|Thread: Songs for the Workshop|
Bazyle, you mean like, Highflying Scotsman, and Orange Blossom Special, by The Spotnicks?
When I'm cleaning workshops - George Formby
DTI - The Shadows
The magical Mrs Clamps - The Shadows
Needles & Pins - The Searchers
|Thread: Am I getting an irritable old git?|
Deborah doesn't like it, the way I comb my hair
Deborah doesn't like all the clothes I wear
playing all my records, singing to the band
but I am what I am and I'm gonna keep a rocking this way
I'm a rockabilly rebel...
We are ailing, we are ailing, rheumy eyes, and balding pate,
we are ailing, we are ailing, trembling hands and stum
The old ones, Darling we're the old ones, and old ones shouldn't be afraid.
to live, love, as the years roll on, for we won't be the old ones very long...
Cheer up, we're not dead yet!
|Thread: homemade anvil.|
I have, with permission, a short piece of Welsh Highland railway line for an anvil. There is a corner of an English workshop that will be forever Gogledd Cymru.
Yes. An iron stand will make the hammer 'bounce,' whereas a log or stump is 'dead'.
|Thread: Meteor detecting|
I forgot to add, simple meteor detection works better at lower frequencies, below 150 MHz.
Yagis need pointing, but at what? The radiant won't help because that's where the meteors 'seem' to originate, but are actually seen at widely separated angles. The gain provided by a yagi is not really necessary as the signals are generally strong enough. A turnstile needs no directivity.
Pointing the yagi upwards by 10 or so degrees minimises signals from terrestrial sources in that direction. You need a vertical polar diagram to show this, rather than the usual horizontal polar diagram, which shows the gain pictorially using the aerial location at the centre.
Height doesn't really matter because you want it to 'look' upwards, any other signals are unwanted. Some mount it in a foil-lined trough, but the jury is out on its effectiveness. Take care with the feed arrangements, one dipole is fed 90 degrees out of phase with the other, it is easy to do. Google 'turnstile antennas'.
The 'blob' is not necessarily a point of maximum signal, but the meteor exploding part way though its final descent. Yes, polarisation of received signals happens all the time, but is most noticeable in faint signals where it means the signal strength may reduce to below the noise.
To counter this, a 'turnstile' or crossed dipoles aerial may be made, which will pick up any polarisation whatever it is.
The doppler shift still applies, but the meteor isn't heading for 'you', the trail begins where the meteor hits atmosphere dense enough to be resistant, and stops when the meteor burns out.
I was listening this morning and didn't hear any either!
Early? I'm often conscious, if not compos mentis, earlye in the morning.
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