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Posting Compression driver??? |
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markie 
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Joined: 31 October 2005 Location: Sunny Liskeard. Status: Offline Points: 4570 |
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 Topic: Posting Compression driver???Posted: 28 September 2020 at 2:46pm |
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I just tried to post a compression driver and post office would not accept it.
Apparently magnetic things have to be specially packed with at least 20mm of packing all round. 1). Will that be enough for a large-ish magnet. 2). How did they know, is there a "Magnet detector" in the parcode reader thingy?
Edited by markie - 28 September 2020 at 2:46pm |
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BJtheDJ
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Joined: 28 November 2012 Location: Bristol Status: Offline Points: 885 |
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Posted: 28 September 2020 at 3:11pm |
Possibly because Post Office scale pans IME are generally steel, and there would have been the magnetic attracation of your parcel content to the steel pan.
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kipman725
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Posted: 28 September 2020 at 3:13pm |
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(from memory) magnetic field strength falls off at the 3rd power of distance from a dipole so even a small increase in packing thickness should greatly reduce the field at the package surface. I guess they must have a sensor if it wasn't so obvious the driver got stuck to the scales. All drivers and magnets I have got in the post have not had anything beyond the packing to avoid mechanical damage.
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markie
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Posted: 28 September 2020 at 3:35pm |
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It didn't stick to the scale so I guess there must be a detector either in Pan or reader.
I've just re-packed with 25mm all round, so I'll advise later.
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If it's got wheels or tits it's gonna cost a fortune
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smithshorn
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Posted: 28 September 2020 at 4:10pm |
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Years ago JBL had to break down their shipments because the stray magnetic field they were causing would throw the compass on the planes off!
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colint
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Posted: 10 October 2020 at 10:45pm |
Highly unlikely, and most stuff that heavy and bulky would normally travel by sea in a container
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mk2_ginger_biscuit69
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Posted: 10 October 2020 at 11:17pm |
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i heard the magnetic fields amplify 5G and cause Covid.
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njw
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Posted: 10 October 2020 at 11:31pm |
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I sent a pair of 18" drivers via the post office a few weeks ago, the only complaints I had were from the woman in the post office about how heavy the box was!
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markie
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Joined: 31 October 2005 Location: Sunny Liskeard. Status: Offline Points: 4570 |
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Posted: 11 October 2020 at 1:12am |
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I can put this to rest. Apparently I used the wrong option on the prepaid online service.
I usually use the signed for service that you hand in at a post office. On this particular parcel I used the tracked option which can only be handed in at a GPO sorting office. That was why the post office could not accept it. Nothing to do with the magnets, it was to do with the barcode. |
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If it's got wheels or tits it's gonna cost a fortune
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smithshorn
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Posted: 11 October 2020 at 4:42pm |
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The information I posted came straight from JBL in a History of JBLbooklet.
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markie
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Posted: 11 October 2020 at 6:12pm |
It's a little known fact that the "Man on the grassy knoll" used a magnetic bullet. The bullet was attracted to the car body hence changed direction.
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If it's got wheels or tits it's gonna cost a fortune
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markie wrote: