Pye G63 electrolytic capacitors. - UK Vintage Radio Repair and Restoration Discussion Forum

DonaldStott · 31st Jan 2023, 12:59 pm

I'm servicing a Pye Stereo Black Box Model G63 for a friend and need a replacement electrolytic capacitor triple can:-

10uF + 10uF + 50uF : 350V

If such a can is unobtainable or too expensive then of course I can either re-stuff the can or tack three separate caps underneath.

Nuvistor · 31st Jan 2023, 1:16 pm

You could fit a 16+16 and add a separate 47uf under the chassis.
https://www.cricklewoodelectronics.c...Capacitor.html

DonaldStott · 31st Jan 2023, 8:36 pm

Thanks Frank - your suggestion is a tidy compromise which will probably be used if the required triple can can't be found.

Uncle Bulgaria · 1st Feb 2023, 1:26 pm

Askjanfirst does some triples, but the closest is a 20+20+20. He would be worth asking in case 'specials' are available, as I understand from his website that some lines are produced to his specifications. I haven't seen many triples in production, but he seems to have quite a few values.

Richardgr · 1st Feb 2023, 2:25 pm

Tube Amp Doctor 40 + 3 x 20
This one leaves you a spare.

DonaldStott · 8th Feb 2023, 9:48 am

I've now extracted the whole amp assembly from the Pye G63 making very careful notes and taking pictures of where every wire was connected. This makes testing, measuring and replacement so much easier.

But I've come across what seems to me to be an anomaly - the triple can is identified in the Service Sheet as C5, C6 and C16 and the capacitor list states that these are 'Capacitors in the same can' - so far so good.

When I look at amp assembly, however, the large can only appears to contain two electrolytics - C16 (50uF) and either C5 or C6 (10uF), see image below:-

Click image for larger version

Name: Pye Can_1.jpg
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The underside tends to confirm this with only two live tags and the can case connected to the chassis:-

Click image for larger version

Name: Pye Can_2.jpg
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So I'm a bit perplexed - I seem to have lost a 10uF electrolytic or is it me that's missing something?

suebutcher · 16th Mar 2023, 12:30 pm

You have seem to have the later version of the circuit, with 16uF and 10uF in the can, and C5 as an axial 8uF wired underneath the chassis. Here's the underside of my G63 chassis showing those components. C5 is the large silver electro below the tag strip.

31st Jan 2023, 12:59 pm	#1
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,676	Pye G63 electrolytic capacitors. I'm servicing a Pye Stereo Black Box Model G63 for a friend and need a replacement electrolytic capacitor triple can:- 10uF + 10uF + 50uF : 350V If such a can is unobtainable or too expensive then of course I can either re-stuff the can or tack three separate caps underneath. __________________ BVWS Member Last edited by DonaldStott; 31st Jan 2023 at 1:05 pm.

31st Jan 2023, 1:16 pm	#2
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,219	Re: Pye g63 You could fit a 16+16 and add a separate 47uf under the chassis. https://www.cricklewoodelectronics.c...Capacitor.html __________________ Frank

31st Jan 2023, 8:36 pm	#3
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,676	Re: Pye G63 electrolytic capacitors. Thanks Frank - your suggestion is a tidy compromise which will probably be used if the required triple can can't be found. __________________ BVWS Member

1st Feb 2023, 1:26 pm	#4
Uncle Bulgaria Octode Join Date: May 2016 Location: Cornwall, UK. Posts: 1,986	Re: Pye G63 electrolytic capacitors. Askjanfirst does some triples, but the closest is a 20+20+20. He would be worth asking in case 'specials' are available, as I understand from his website that some lines are produced to his specifications. I haven't seen many triples in production, but he seems to have quite a few values.

1st Feb 2023, 2:25 pm	#5
Richardgr Hexode Join Date: Oct 2019 Location: Täby, Sweden Posts: 449	Re: Pye G63 electrolytic capacitors. Tube Amp Doctor 40 + 3 x 20 This one leaves you a spare.

8th Feb 2023, 9:48 am	#6
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,676	Re: Pye G63 electrolytic capacitors. I've now extracted the whole amp assembly from the Pye G63 making very careful notes and taking pictures of where every wire was connected. This makes testing, measuring and replacement so much easier. But I've come across what seems to me to be an anomaly - the triple can is identified in the Service Sheet as C5, C6 and C16 and the capacitor list states that these are 'Capacitors in the same can' - so far so good. When I look at amp assembly, however, the large can only appears to contain two electrolytics - C16 (50uF) and either C5 or C6 (10uF), see image below:- The underside tends to confirm this with only two live tags and the can case connected to the chassis:- So I'm a bit perplexed - I seem to have lost a 10uF electrolytic or is it me that's missing something? __________________ BVWS Member

16th Mar 2023, 12:30 pm	#7
suebutcher Heptode Join Date: Jul 2012 Location: Daylesford, Victoria, Australia Posts: 645	Re: Pye G63 electrolytic capacitors. You have seem to have the later version of the circuit, with 16uF and 10uF in the can, and C5 as an axial 8uF wired underneath the chassis. Here's the underside of my G63 chassis showing those components. C5 is the large silver electro below the tag strip. Attached Thumbnails __________________ The Waves That Rule Britannia Last edited by suebutcher; 16th Mar 2023 at 12:39 pm.