UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Hints, Tips and Solutions (Do NOT post requests for help here)

Notices

Hints, Tips and Solutions (Do NOT post requests for help here) If you have any useful general hints and tips for vintage technology repair and restoration, please share them here. PLEASE DO NOT POST REQUESTS FOR HELP HERE!

Reply
 
Thread Tools
Old 10th Jul 2021, 11:02 pm   #1
Julesomega
Octode
 
Julesomega's Avatar
 
Join Date: Dec 2012
Location: Stockport, Greater Manchester, UK.
Posts: 1,387
Default Rosin flux needle bottle users

In the now closed thread Liquid Rosin Flux I said to avoid catastrophic spills at all cost because your entire workbench, all the tools and testgear, and your clothes will be ruined. In particular avoid fumbling while handling the bottle as the resulting movement may be unexpected.

In the video The Bizarre Behavior of Rotating Bodies a mathematician explains the Dzhanibekov Effect in simple terms, using a needle bottle as an example
__________________
- Julian

It's good here
Julesomega is offline   Reply With Quote
Old 11th Jul 2021, 1:33 am   #2
rambo1152
Nonode
 
rambo1152's Avatar
 
Join Date: May 2010
Location: Manchester, UK.
Posts: 2,805
Default Re: Rosin flux needle bottle users

The Youtube algorithm fed me that video a couple of weeks ago. Very interesting.

What's the deal with liquids in unstable flat-sided bottles?

Click image for larger version

Name:	flux.jpg
Views:	84
Size:	40.1 KB
ID:	237455

Are they designed to topple over and spill?

In the TV rental trade in the '70s we used gallons of Joynes Waxless Polish, which came in a glass flat medicine style bottle. I think most of it was accidentally used to polish the bench tops when the bottle got knocked over.
__________________
--
Graham.
G3ZVT
rambo1152 is online now   Reply With Quote
Old 11th Jul 2021, 1:57 am   #3
Bazz4CQJ
Dekatron
 
Bazz4CQJ's Avatar
 
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 3,330
Default Re: Rosin flux needle bottle users

Quote:
Originally Posted by rambo1152 View Post
What's the deal with liquids in unstable flat-sided bottles?
Most generally, a flat sided-bottle is wide and more visible on the shelf in the supermarket! It's not an efficient use of plastic, and it may well tip over and spill, but the key factor is that it gets sold.

For stuff like flux, that may not be a requirement, but the bottle makers are set up to make bottles of that form.

B
__________________
Data beats opinions most times... that's my opinion, though I have no data on that.
Bazz4CQJ is online now   Reply With Quote
Old 11th Jul 2021, 8:11 am   #4
60 oldjohn
Nonode
 
Join Date: Dec 2004
Location: East Yorkshire, UK.
Posts: 2,981
Default Re: Rosin flux needle bottle users

I keep the old bottle and decant a small amount from the new bottle, just enough so it does not run out when laid on it side. It will not prevent every spill scenario, but ok for when I knock it on it's side. I do it to tins Brasso as well.

John.
__________________
My favourite text message "I'll be there in five minutes, if not read again"
60 oldjohn is offline   Reply With Quote
Old 11th Jul 2021, 9:50 am   #5
Radio Wrangler
Moderator
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 17,881
Default Re: Rosin flux needle bottle users

Great video!

Planet Earth is a bit more complex than a hard bottle filled with lossy fluid. The surface is somewhat fluid/flexible and floats on the core fluid. The rotation causes forces which make it an oblate spheroid, so the rotation about the axis with maximum moment of inertia is interesting because the rotation sets which axis has the maximum moment of inertia. There seems to be a loop of causality. This could be stable or unstable and I don't know enough to work out which.

Additionally, the fluid core is magnetically active, and there are further forces as a consequence. Oh, and there's the movement of the two bulges in the oceans... the tides caused by the moon (and lesser ones due to other bodies...) So now the lunar orbit gets thrown into the mix.

It's left me wanting a tennis racquet.

Back to radio, soldering and flux. Liquid flux is sticky-messy enough in a nice reliable gravitational field. I'm not sure I'd want to go soldering in zero gravity and releasing little particles of spatter to float around. Solder particles are conductive and flux is chemically active. Nice!. Murphy says they will move to the place of maximum mischief.

Needle bottles of liquid flux may not be desirable in orbit.

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is online now   Reply With Quote
Old 11th Jul 2021, 1:38 pm   #6
merlinmaxwell
Dekatron
 
merlinmaxwell's Avatar
 
Join Date: Jul 2008
Location: Maidenhead, Berkshire, UK.
Posts: 10,949
Default Re: Rosin flux needle bottle users

Odd as it sounds I use an aerosol flux can, with gentle pressure I can deliver very small drops of flux from the tube. The tube is clear and I can see the drop arriving, the drops are separated by the propellant gas.
__________________
Cats have staff, it's dogs that have owners.
merlinmaxwell is offline   Reply With Quote
Old 12th Jul 2021, 3:49 pm   #7
Electronpusher0
Octode
 
Join Date: Jun 2016
Location: Bognor Regis, West Sussex, UK.
Posts: 1,558
Default Re: Rosin flux needle bottle users

Quote:
Originally Posted by Radio Wrangler View Post
Great video!

there are further forces as a consequence. Oh, and there's the movement of the two bulges in the oceans... the tides caused by the moon (and lesser ones due to other bodies...) So now the lunar orbit gets thrown into the mix.

David
I have read that it is the moon that prevents the earth from flipping. Our moon is the largest in relation to its planet in the solar system. Earth and the moon are effectively linked by the gravitational attraction between them and this acts to stabilise the axial tilt.
Venus has no moon and has flipped in the past so that it rotates retrograde.

Peter
Electronpusher0 is offline   Reply With Quote
Old 16th Jul 2021, 12:58 pm   #8
ionburn
Heptode
 
ionburn's Avatar
 
Join Date: Dec 2014
Location: Lincoln, Lincolnshire, UK.
Posts: 581
Default Re: Rosin flux needle bottle users

Quote:
Originally Posted by rambo1152 View Post

What's the deal with liquids in unstable flat-sided bottles?

Attachment 237455

Are they designed to topple over and spill?
I have a similar little flat sided little bottle which has my surface mount flux. It's rather sticky and a pain to get off anywhere too. It has a brush applicator which is useful. I have it permanently stood in a larger high sided glass jar. It might have been an old paste jar or similar and is about half as high as the bottle. That way the bottle cannot fall over and if liquid ever ran down the bottle it would collect in the jar.
ionburn is offline   Reply With Quote
Old 17th Jul 2021, 9:41 pm   #9
Brettski
Tetrode
 
Brettski's Avatar
 
Join Date: Dec 2017
Location: York, North Yorkshire, UK.
Posts: 64
Default Re: Rosin flux needle bottle users

I love my needle bottle. Would struggle without it .
__________________
BVWS Memeber
Brettski is offline   Reply With Quote
Old 20th Jul 2021, 12:09 am   #10
Maarten
Dekatron
 
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 3,250
Default Re: Rosin flux needle bottle users

I like gel flux better.
Maarten is online now   Reply With Quote
Old 20th Jul 2021, 8:05 pm   #11
Paul_RK
Dekatron
 
Paul_RK's Avatar
 
Join Date: Nov 2003
Location: Fakenham, Norfolk, UK.
Posts: 3,191
Default Re: Rosin flux needle bottle users

I see it has ribbing too, so perhaps its form is a survival of a long-established convention for substances "not to be taken" to come in flattened bottles with tactile surfaces easily recognised in dim light and by blind folk once they knew the implied warning. I've picked up several 1920s/30s glass examples at a nearby bottle dump: Jeyes Fluid, Sanizal etc..

Paul
Paul_RK is online now   Reply With Quote
Reply

Thread Tools



All times are GMT. The time now is 7:24 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Copyright ©2002 - 2021, Paul Stenning.