Ekco RP430 - UK Vintage Radio Repair and Restoration Discussion Forum

recordplayer · 16th Oct 2018, 7:03 pm

HI , just repairing this player and C7 , C8 and C9 look weary and test out of spec also the Hunts caps I am going to change - I have the circuit and its on the Service data DVD but can anyone let me know if the Metalmite caps C7 , C8 and C9 are polarised - they are coloured red and black at each end but I am pretty sure these are not electrolytics - in fact I have never changed a Metalmite capacitor and have been doing this job for years !! The values of the caps are 0.01uf at 350 volt , Tony .

Nuvistor · 16th Oct 2018, 9:36 pm

Metalmite capacitors are paper dielectric, I have had them fail.

recordplayer · 16th Oct 2018, 10:17 pm

Hi , yes I don't want to leave them in or replace with nos caps . What's a good modern replacement for these ?

'LIVEWIRE?' · 17th Oct 2018, 8:37 am

Personally I would use the yellow poly. axial caps made by LCR and others. These are what I normally use in any valved gear.

dazzlevision · 17th Oct 2018, 9:22 am

I use the Vishay (Roederstein) MKT1813 series Polyester film capacitors.

https://uk.rs-online.com/mobile/p/po...itors/1854280/

'LIVEWIRE?' · 17th Oct 2018, 11:51 am

Those are the type I meant, DV. I've bought similar caps from, among others, CPC, Cricklewood Electronics, Farnell, & RS, over the years. Not all have been made by Vishay, though.

recordplayer · 17th Oct 2018, 2:46 pm

Yes. I usually use the yellow LCR poly caps rated at 600 volts - but was just making sure the metalmites were not polarised - will get parts on order and see how I go - it should sound good 7 watts 2xECL 86 push-pull amp fitted.

recordplayer · 25th Oct 2018, 8:58 pm

Hi , sorted the amp on this now - sounds great - just need to do the usual clean , re-grease and re-lubricate the deck , metalmites replaced with LCR poly caps and been on test for a full day so its looking good !

16th Oct 2018, 7:03 pm	#1
recordplayer Pentode Join Date: May 2010 Location: Preston, Lancashire, UK. Posts: 156	Ekco RP430 HI , just repairing this player and C7 , C8 and C9 look weary and test out of spec also the Hunts caps I am going to change - I have the circuit and its on the Service data DVD but can anyone let me know if the Metalmite caps C7 , C8 and C9 are polarised - they are coloured red and black at each end but I am pretty sure these are not electrolytics - in fact I have never changed a Metalmite capacitor and have been doing this job for years !! The values of the caps are 0.01uf at 350 volt , Tony .

16th Oct 2018, 9:36 pm	#2
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Ekco RP430 Metalmite capacitors are paper dielectric, I have had them fail. Attached Thumbnails __________________ Frank

16th Oct 2018, 10:17 pm	#3
recordplayer Pentode Join Date: May 2010 Location: Preston, Lancashire, UK. Posts: 156	Re: Ekco RP430 Hi , yes I don't want to leave them in or replace with nos caps . What's a good modern replacement for these ?

17th Oct 2018, 8:37 am	#4
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Ekco RP430 Personally I would use the yellow poly. axial caps made by LCR and others. These are what I normally use in any valved gear.

17th Oct 2018, 9:22 am	#5
dazzlevision Dekatron Join Date: Sep 2003 Location: Near Swindon, North Wiltshire, UK. Posts: 3,611	Re: Ekco RP430 I use the Vishay (Roederstein) MKT1813 series Polyester film capacitors. https://uk.rs-online.com/mobile/p/po...itors/1854280/

17th Oct 2018, 11:51 am	#6
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Ekco RP430 Those are the type I meant, DV. I've bought similar caps from, among others, CPC, Cricklewood Electronics, Farnell, & RS, over the years. Not all have been made by Vishay, though.

17th Oct 2018, 2:46 pm	#7
recordplayer Pentode Join Date: May 2010 Location: Preston, Lancashire, UK. Posts: 156	Re: Ekco RP430 Yes. I usually use the yellow LCR poly caps rated at 600 volts - but was just making sure the metalmites were not polarised - will get parts on order and see how I go - it should sound good 7 watts 2xECL 86 push-pull amp fitted.

25th Oct 2018, 8:58 pm	#8
recordplayer Pentode Join Date: May 2010 Location: Preston, Lancashire, UK. Posts: 156	Re: Ekco RP430 Hi , sorted the amp on this now - sounds great - just need to do the usual clean , re-grease and re-lubricate the deck , metalmites replaced with LCR poly caps and been on test for a full day so its looking good !