Kenwood Chef A701A question - UK Vintage Radio Repair and Restoration Discussion Forum

Morph76 · 18th Jan 2016, 10:08 pm

Hi.
I Have an A701A that was working fine, but was in a bad state so I began stripping it down, and broke one of the wires that goes via a plate (pictured) to the neutral cable on the plug. To repair it I needed to remove some heat shrink, and uncovered a resistor type thing. I need to know if I can re-solder and heat shrink this part. I have attached a picture.

John_BS · 18th Jan 2016, 10:41 pm

If it was originally sleeved, that should be fine. It's an inductor so it won't get (noticably) hot.

John

Morph76 · 18th Jan 2016, 10:54 pm

Thanks John.
I have been researching this for some time and in the past 10 minutes managed to find this which I believe will replace it directly
http://uk.rs-online.com/web/p/leaded-inductors/2131881/

Herald1360 · 18th Jan 2016, 11:29 pm

If it has similar wire gauge, diameter and number of turns it should be fine. It's a noise suppressor and unlikely to be critical.

Check the old one to see if its core is magnetic or just a ceramic tube/high value resistor, the Epcos part is ferrite cored.

Morph76 · 20th Jan 2016, 7:41 pm

Heat shrunk and soldered the original back together in the end. It seems a little laboured when turning it on but as you go up through the speed settings it pulls and runs perfectly.
Thanks all for your help.

dseymo1 · 20th Jan 2016, 8:39 pm

They usually sound a bit rough at low speed because of the electro-mechanical governor.
Make sure that the rubber feet are still intact - they are essential for proper ventilation.

Refugee · 20th Jan 2016, 10:06 pm

do you know how to set the bottom speed?

dseymo1 · 20th Jan 2016, 10:51 pm

It should be set for a beater speed of 60 rpm, using the screws accessed through holes in the lower motor cover (N.B. - screws are live!). Turn both screws equally, clockwise = slower.
If it's *really* rough, with significant arcing, the 0.1uF capacitor needs replacing.

PaulR · 1st Feb 2016, 5:16 pm

You can get repair kits for them which replace all the critical suppressor parts. They are a bit fiddly to fit but I did one which was very successful.

You could probably also do with replacing the various oil seals (another kit). The gear casing is literally filled with grease which gets everywhere once the seals start to leak. On mine the grease was beginning to find its way onto the motor housing, but fortunately had not quite reached the motor itself.

Paul

18th Jan 2016, 10:08 pm	#1
Morph76 Retired Dormant Member Join Date: Jan 2016 Location: Devonshire, UK. Posts: 8	Kenwood Chef A701A question Hi. I Have an A701A that was working fine, but was in a bad state so I began stripping it down, and broke one of the wires that goes via a plate (pictured) to the neutral cable on the plug. To repair it I needed to remove some heat shrink, and uncovered a resistor type thing. I need to know if I can re-solder and heat shrink this part. I have attached a picture. Attached Thumbnails

18th Jan 2016, 10:41 pm	#2
John_BS Octode Join Date: Dec 2008 Location: Wincanton, Somerset, UK. Posts: 1,782	Re: Kenwood Chef A701A question If it was originally sleeved, that should be fine. It's an inductor so it won't get (noticably) hot. John

18th Jan 2016, 10:54 pm	#3
Morph76 Retired Dormant Member Join Date: Jan 2016 Location: Devonshire, UK. Posts: 8	Re: Kenwood Chef A701A question Thanks John. I have been researching this for some time and in the past 10 minutes managed to find this which I believe will replace it directly http://uk.rs-online.com/web/p/leaded-inductors/2131881/

18th Jan 2016, 11:29 pm	#4
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: Kenwood Chef A701A question If it has similar wire gauge, diameter and number of turns it should be fine. It's a noise suppressor and unlikely to be critical. Check the old one to see if its core is magnetic or just a ceramic tube/high value resistor, the Epcos part is ferrite cored. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

20th Jan 2016, 7:41 pm	#5
Morph76 Retired Dormant Member Join Date: Jan 2016 Location: Devonshire, UK. Posts: 8	Re: Kenwood Chef A701A question Heat shrunk and soldered the original back together in the end. It seems a little laboured when turning it on but as you go up through the speed settings it pulls and runs perfectly. Thanks all for your help.

20th Jan 2016, 8:39 pm	#6
dseymo1 Retired Dormant Member Join Date: Dec 2007 Location: Shropshire, UK. Posts: 3,051	Re: Kenwood Chef A701A question They usually sound a bit rough at low speed because of the electro-mechanical governor. Make sure that the rubber feet are still intact - they are essential for proper ventilation.

20th Jan 2016, 10:06 pm	#7
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,554	Re: Kenwood Chef A701A question do you know how to set the bottom speed?

20th Jan 2016, 10:51 pm	#8
dseymo1 Retired Dormant Member Join Date: Dec 2007 Location: Shropshire, UK. Posts: 3,051	Re: Kenwood Chef A701A question It should be set for a beater speed of 60 rpm, using the screws accessed through holes in the lower motor cover (N.B. - screws are live!). Turn both screws equally, clockwise = slower. If it's really rough, with significant arcing, the 0.1uF capacitor needs replacing.

1st Feb 2016, 5:16 pm	#9
PaulR Dekatron Join Date: Oct 2003 Location: Southport Lancashire, UK. Posts: 3,236	Re: Kenwood Chef A701A question You can get repair kits for them which replace all the critical suppressor parts. They are a bit fiddly to fit but I did one which was very successful. You could probably also do with replacing the various oil seals (another kit). The gear casing is literally filled with grease which gets everywhere once the seals start to leak. On mine the grease was beginning to find its way onto the motor housing, but fortunately had not quite reached the motor itself. Paul