Help replacing inductor coil for motor - UK Vintage Radio Repair and Restoration Discussion Forum

Spencervs · 9th Jan 2023, 2:19 pm

Hi there, I was wondering whether someone can help me identify a replacement inductor for my Kenwood Chef A701A? Unfortunately it broke and I can't find any information about them. I saw someone had drawn a circuit out that specifies that they are 5uh but when I took a reading of it in circuit, it read 1uh.

I found a similar component on eBay reading 7uh but the coil was thicker. Does it matter?

Graham G3ZVT · 9th Jan 2023, 4:04 pm

EPCOS make these chokes.
Has the ferrite broken at one end? Can't you solder a solid wire to the coil? would it be sufficiently supported?

another option, use one of these
https://www.digikey.co.uk/en/product...BoCkZIQAvD_BwE
Don't worry about the discrepancy of your measured value, it's probebly wrong anyway.

Option 3 would be to short it out altogether the main issue back in the sixties was to mitigate interference on 405 line TV.

FIXITNOW · 9th Jan 2023, 4:53 pm

the kits they do call it a 3A Epcos Choke

so i would just fit a 3a choke what ever i could source

Spencervs · 12th Jan 2023, 1:48 am

Thanks guys, that's all I thin ok I needed. I unfortunately snapped the wire right at the ferrite so it is unsalvageable but I found an epcos 12uh 3a inductor. Would that be ok? Also why do the values not matter much?

Uncle Bulgaria · 12th Jan 2023, 1:52 am

As rambo1152 says, it's there to smooth interference that might otherwise get back into the mains, rather like 'suppression' capacitors. You can but try it.

9th Jan 2023, 2:19 pm	#1
Spencervs Hexode Join Date: Apr 2011 Location: Grove Park, SE London Posts: 382	Help replacing inductor coil for motor Hi there, I was wondering whether someone can help me identify a replacement inductor for my Kenwood Chef A701A? Unfortunately it broke and I can't find any information about them. I saw someone had drawn a circuit out that specifies that they are 5uh but when I took a reading of it in circuit, it read 1uh. I found a similar component on eBay reading 7uh but the coil was thicker. Does it matter? Attached Thumbnails

9th Jan 2023, 4:04 pm	#2
Graham G3ZVT Dekatron Join Date: May 2010 Location: Greater Manchester, UK. Posts: 18,725	Re: Help replacing inductor coil for motor EPCOS make these chokes. Has the ferrite broken at one end? Can't you solder a solid wire to the coil? would it be sufficiently supported? another option, use one of these https://www.digikey.co.uk/en/product...BoCkZIQAvD_BwE Don't worry about the discrepancy of your measured value, it's probebly wrong anyway. Option 3 would be to short it out altogether the main issue back in the sixties was to mitigate interference on 405 line TV. __________________ -- Graham. G3ZVT Last edited by Graham G3ZVT; 9th Jan 2023 at 4:10 pm.

9th Jan 2023, 4:53 pm	#3
FIXITNOW Octode Join Date: Feb 2007 Location: Ely, Cambridgeshire, UK. Posts: 1,976	Re: Help replacing inductor coil for motor the kits they do call it a 3A Epcos Choke so i would just fit a 3a choke what ever i could source

12th Jan 2023, 1:48 am	#4
Spencervs Hexode Join Date: Apr 2011 Location: Grove Park, SE London Posts: 382	Re: Help replacing inductor coil for motor Thanks guys, that's all I thin ok I needed. I unfortunately snapped the wire right at the ferrite so it is unsalvageable but I found an epcos 12uh 3a inductor. Would that be ok? Also why do the values not matter much?

12th Jan 2023, 1:52 am	#5
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Re: Help replacing inductor coil for motor As rambo1152 says, it's there to smooth interference that might otherwise get back into the mains, rather like 'suppression' capacitors. You can but try it.