Regentone A133 Radio. - UK Vintage Radio Repair and Restoration Discussion Forum

Teltoons · 19th May 2015, 9:26 am

Hi,
Another novice question (sigh).

I am hoping to restore a A133 Regentone Radio. I have removed the chassis from its cabinet so I can clean the underside.

Can someone please name the grey component in the attached photo? It has the diameter of a pencil & is about 4cm long. Also, it gets quite hot after a few minutes. Is this usual?

Thanks in advance.

Terry.

PsychMan · 19th May 2015, 3:46 pm

Hi Terry, don't see any pictures?

Cobaltblue · 19th May 2015, 4:04 pm

Still no pictures

Long time since I played with an A133 but the part you interested in is probably part of the smoothing circuit and its a 1K 4W resistor and yes it will get quite hot.

Physically from memory its strung between the main smoothing capacitor and a tag on the output transformer.

Have you done any restoration and replacement of capacitors?

Certainly if the Grid coupling capacitor of the EL41 has not been replaced this resistor might get hotter than normal.

Cheers

Mike T

Teltoons · 19th May 2015, 4:20 pm

Hi,
Sorry Guys!! In a rush this morning and didn't attach the photo.
Please find attachment, Terry

Nickthedentist · 19th May 2015, 4:37 pm

It's a high-power, wirewound resistor as far as I can tell.

ukcol · 19th May 2015, 4:55 pm

Yes as Nick says a high power wirewound resistor, and exactly as Mike says a Ik 4watt. It is component 17 in the ERT service sheet available here.

Teltoons · 21st May 2015, 8:50 am

Thanks Nick & Colin for the infomation.
Cheers
Terry

Nickthedentist · 21st May 2015, 7:10 pm

and Mike!!!

paulsherwin · 21st May 2015, 7:37 pm

These are actually nice easy sets for a beginner, so you've chosen well. Once you understand what's going on here you'll be able to work on most 50s sets without problems.

Teltoons · 22nd May 2015, 8:03 am

Hi Paul,
Thanks for the encouragement.
Cheers, Terry

19th May 2015, 9:26 am	#1
Teltoons Diode Join Date: May 2015 Location: Middleton, Manchester, UK. Posts: 5	Regentone A133 Radio. Hi, Another novice question (sigh). I am hoping to restore a A133 Regentone Radio. I have removed the chassis from its cabinet so I can clean the underside. Can someone please name the grey component in the attached photo? It has the diameter of a pencil & is about 4cm long. Also, it gets quite hot after a few minutes. Is this usual? Thanks in advance. Terry.

19th May 2015, 3:46 pm	#2
PsychMan Octode Join Date: Jun 2013 Location: Fleet, Hampshire, UK Posts: 1,765	Re: Regentone A133 Radio. Hi Terry, don't see any pictures?

19th May 2015, 4:04 pm	#3
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,878	Re: Regentone A133 Radio. Still no pictures Long time since I played with an A133 but the part you interested in is probably part of the smoothing circuit and its a 1K 4W resistor and yes it will get quite hot. Physically from memory its strung between the main smoothing capacitor and a tag on the output transformer. Have you done any restoration and replacement of capacitors? Certainly if the Grid coupling capacitor of the EL41 has not been replaced this resistor might get hotter than normal. Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

19th May 2015, 4:20 pm	#4
Teltoons Diode Join Date: May 2015 Location: Middleton, Manchester, UK. Posts: 5	Re: Regentone A133 Radio. Hi, Sorry Guys!! In a rush this morning and didn't attach the photo. Please find attachment, Terry Attached Thumbnails

19th May 2015, 4:37 pm	#5
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,864	Re: Regentone A133 Radio. It's a high-power, wirewound resistor as far as I can tell.

19th May 2015, 4:55 pm	#6
ukcol Rest in Peace Join Date: May 2003 Location: Harlaxton, Lincolnshire, UK. Posts: 3,944	Re: Regentone A133 Radio. Yes as Nick says a high power wirewound resistor, and exactly as Mike says a Ik 4watt. It is component 17 in the ERT service sheet available here.

21st May 2015, 8:50 am	#7
Teltoons Diode Join Date: May 2015 Location: Middleton, Manchester, UK. Posts: 5	Re: Regentone A133 Radio. Thanks Nick & Colin for the infomation. Cheers Terry

21st May 2015, 7:10 pm	#8
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,864	Re: Regentone A133 Radio. and Mike!!!

21st May 2015, 7:37 pm	#9
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,969	Re: Regentone A133 Radio. These are actually nice easy sets for a beginner, so you've chosen well. Once you understand what's going on here you'll be able to work on most 50s sets without problems.

22nd May 2015, 8:03 am	#10
Teltoons Diode Join Date: May 2015 Location: Middleton, Manchester, UK. Posts: 5	Re: Regentone A133 Radio. Hi Paul, Thanks for the encouragement. Cheers, Terry