4mfd electrolytic capacitor. - UK Vintage Radio Repair and Restoration Discussion Forum

robin coleman · 6th Jul 2014, 8:09 am

What is the closest capacitor I can use to replace a electrolytic capacitor in a Vidor radio?

Would a 10uf be OK?

Regards,

Robin

Mike Phelan · 6th Jul 2014, 8:47 am

Probably, but what's its purpose in the circuit? What model is the radio?

Kala_12 · 6th Jul 2014, 8:50 am

Surely a 4.7uf would be closest. Just check voltage rating.
Stuart.

robin coleman · 6th Jul 2014, 9:34 am

It is a Vidor CN359 12V capacitor.

Regards, Robin.

Station X · 6th Jul 2014, 9:52 am

Looking at the circuit I can't see a 4uF 12V capacitor. What's its designation or function?

jonnybear · 6th Jul 2014, 2:24 pm

The only 4uf capacitor in that radio is rated at 350v, the only 12 volt caps are 50uf, if it is one of these suggest 47uf 25v replacement, if it is the 4uf 350v that can be replaced with 4.7uf 350-450v or your 10uf 350-450v will be ok.
John

AC/HL · 6th Jul 2014, 4:01 pm

A duff CFL will yield a 350v capacitor (2-10uf depending on wattage)

paulsherwin · 6th Jul 2014, 5:38 pm

Be very careful dismantling a CFL as that cap can hold a charge for a very long time (guess how I know that

)

robin coleman · 7th Jul 2014, 11:26 am

I will be careful of caps, thanks for the warning.

I have had a look through my radio and television servicing books but do not have the diagram.

jonnybear · 15th Jul 2014, 10:11 am

Sevice sheet avaliable here.http://www.service-data.com/search.p...&search=Search. If you are working on Vintage Receivers well worth buying the DVD in the long run.
John

6th Jul 2014, 8:09 am	#1
robin coleman Hexode Join Date: Oct 2011 Location: Portsmouth, Hampshire, UK. Posts: 354	4mfd electrolytic capacitor. What is the closest capacitor I can use to replace a electrolytic capacitor in a Vidor radio? Would a 10uf be OK? Regards, Robin Last edited by Mike Phelan; 6th Jul 2014 at 8:45 am. Reason: Readability.

6th Jul 2014, 8:47 am	#2
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Re: 4mfd electrolytic capacitor. Probably, but what's its purpose in the circuit? What model is the radio? __________________ Mike.

6th Jul 2014, 8:50 am	#3
Kala_12 Hexode Join Date: Dec 2012 Location: Carmarthen, Carmarthenshire, UK. Posts: 268	Re: 4mfd electrolytic capacitor. Surely a 4.7uf would be closest. Just check voltage rating. Stuart. __________________ Half my stuff is junk - luckily, my wife doesn't know which half!

6th Jul 2014, 9:34 am	#4
robin coleman Hexode Join Date: Oct 2011 Location: Portsmouth, Hampshire, UK. Posts: 354	Re: 4mfd electrolytic capacitor. It is a Vidor CN359 12V capacitor. Regards, Robin.

6th Jul 2014, 9:52 am	#5
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: 4mfd electrolytic capacitor. Looking at the circuit I can't see a 4uF 12V capacitor. What's its designation or function? __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

6th Jul 2014, 2:24 pm	#6
jonnybear Octode Join Date: Nov 2010 Location: Cullompton, Devon, UK. Posts: 1,435	Re: 4mfd electrolytic capacitor. The only 4uf capacitor in that radio is rated at 350v, the only 12 volt caps are 50uf, if it is one of these suggest 47uf 25v replacement, if it is the 4uf 350v that can be replaced with 4.7uf 350-450v or your 10uf 350-450v will be ok. John

6th Jul 2014, 4:01 pm	#7
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,642	Re: 4mfd electrolytic capacitor. A duff CFL will yield a 350v capacitor (2-10uf depending on wattage)

6th Jul 2014, 5:38 pm	#8
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,970	Re: 4mfd electrolytic capacitor. Be very careful dismantling a CFL as that cap can hold a charge for a very long time (guess how I know that )

7th Jul 2014, 11:26 am	#9
robin coleman Hexode Join Date: Oct 2011 Location: Portsmouth, Hampshire, UK. Posts: 354	Re: 4mfd electrolytic capacitor. I will be careful of caps, thanks for the warning. I have had a look through my radio and television servicing books but do not have the diagram. Last edited by Mike Phelan; 7th Jul 2014 at 4:42 pm. Reason: Readability.

15th Jul 2014, 10:11 am	#10
jonnybear Octode Join Date: Nov 2010 Location: Cullompton, Devon, UK. Posts: 1,435	Re: 4mfd electrolytic capacitor. Sevice sheet avaliable here.http://www.service-data.com/search.p...&search=Search. If you are working on Vintage Receivers well worth buying the DVD in the long run. John Last edited by jonnybear; 15th Jul 2014 at 10:16 am.