|
Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
|
Thread Tools |
2nd May 2022, 11:34 am | #61 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,809
|
Re: Mains filtering
I want to experiment with large ferrite toroids by making multiple turns of the mains cables on individual sets through them. Having looked on the internet and auction site there seems to be a bewildering amount of shapes, sizes and types. Can anyone suggest a starter for ten to begin with please? They're generally £10 or less so it's not an expensive experiment.
__________________
A digital radio is the latest thing, but a vintage wireless is forever.. |
2nd May 2022, 1:03 pm | #62 |
Dekatron
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 4,941
|
Re: Mains filtering
The government will be closing 2G/3G entirely by 2033.
But in England, both SMETS1 and SMETS2 smart meters currently use the same 2G/3G comms (comms methods are different in Scotland). They will have to be upgraded in due course to move to (probably) 5G. Craig
__________________
Doomed for a certain term to walk the night |
2nd May 2022, 11:18 pm | #63 | |
Heptode
Join Date: May 2009
Location: Birmingham, West Midlands, UK.
Posts: 708
|
Re: Mains filtering
Quote:
|
|
2nd May 2022, 11:29 pm | #64 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,801
|
Re: Mains filtering
Smart meters and the ending of cellphone formats have had fairly recent airings on the forum. Can we leave this thread to the mains filtering issue, please?
David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
3rd May 2022, 6:50 am | #65 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,809
|
Re: Mains filtering
I've ordered a large type 31 ferrite ring with an internal diameter of 35mm so I will be able to pass the mains cable from a set through it several times. Let's see what happens.
__________________
A digital radio is the latest thing, but a vintage wireless is forever.. |
3rd May 2022, 8:29 am | #66 |
Dekatron
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 4,941
|
Re: Mains filtering
There is an improved design that adds a second ferrite attenuator immediately after the large one, and adds a conventional filter afterwards, here:
https://gm3sek.com/2019/10/11/clean-up-your-shack-2019/ Craig
__________________
Doomed for a certain term to walk the night |
3rd May 2022, 10:01 am | #67 | |
Heptode
Join Date: May 2009
Location: Birmingham, West Midlands, UK.
Posts: 708
|
Re: Mains filtering
Quote:
..I think I stuck to the subject of the thread .. which I assumed was discovering sources of interference.. but ok I'll shut up. |
|
3rd Aug 2022, 8:38 am | #68 |
Octode
Join Date: May 2009
Location: Stevenage, Herts. UK.
Posts: 1,515
|
Re: Mains filtering
|
3rd Aug 2022, 4:10 pm | #69 |
Dekatron
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
|
Re: Mains filtering
A couple of years ago there was a reader's letter in the IET journal E&T, recounting how, when the writer had been staying with relatives over Christmas, they had had a problem with mains-borne interference from the power supply of a new acqisition. The writer, not having access to ferrite rings, had the idea of using the wire that had kept sparking wine corks in place. Apparently a ring made from three or four twisted together with the flex threaded though it, effected a complete cure.
|