Philips 653 radio - UK Vintage Radio Repair and Restoration Discussion Forum

rockinmark · 15th Dec 2019, 1:47 pm

I have had this radio for a long time I was told it needed a rectifier but not sure. I don't have manual. Is it worth doing anything with

HamishBoxer · 15th Dec 2019, 1:49 pm

I guess it is worth sorting but it will want a few other bits changing.

Have you checked Pauls sheets at the top right? Yes,it is up there,change the EZ80 that is missing and at least C39.

rockinmark · 15th Dec 2019, 3:41 pm

Is that for the 653 4E 3D

HamishBoxer · 15th Dec 2019, 3:51 pm

It is for a 653A, I will look for other variants .No,I can only find the 653A.

Cobaltblue · 15th Dec 2019, 5:04 pm

There seems to be a couple of Philips models with similar numbers

I take it this is the one Mark means ?

https://www.radiomuseum.org/r/philip...n_6534e3d.html

Cheers

Mike T

cathoderay57 · 15th Dec 2019, 8:09 pm

The valve line-up at the RM website doesn't make sense. OK, push-pull output maybe, but not a pair of UL41s as well as a pair of EL84s surely (or am I missing something?) If all the other valves are E-series then the UL41s must be wrong methinks? No rectifier so presumably a selenium bridge rectifier? Cheers, Jerry

Cobaltblue · 15th Dec 2019, 8:23 pm

Well worth looking at the circuit on this one Jerry, never underestimate Philips desire to baffle and bewilder

I can't attach the circuit as its against radiomuseum policy but it does indeed have UL41's and EL84's

I added a link but it wasn't similar on closer inspection!

Cheers

Mike T

cathoderay57 · 15th Dec 2019, 8:30 pm

Hi Mike, thanks, I downloaded the page with the AF output stage. Wow, never seen anything like that before - as you say, only Philips……. Should make an interesting resto project but not simple, just looking at the switchery. Cheers, Jerry

ms660 · 15th Dec 2019, 8:48 pm

There's also a schematic for the BD653a here:

https://www.doctsf.com/documents/aff...3544&num_fic=1

It's an 800 ohm output job.

Lawrence.

rockinmark · 15th Dec 2019, 10:28 pm

Think this one is beyond me then, that's probably why it was put to the back of my cupboard. It must have been put there until I found someone to show me what to do with it haha it does look like a nice radio.

Radio Wrangler · 15th Dec 2019, 11:45 pm

And the UL41 is used for its heater-cathode isolation as the top part of the totem pole.

David

15th Dec 2019, 1:47 pm	#1
rockinmark Heptode Join Date: Sep 2014 Location: St Albans, Hertfordshire, UK. Posts: 594	Philips 653 radio I have had this radio for a long time I was told it needed a rectifier but not sure. I don't have manual. Is it worth doing anything with

15th Dec 2019, 1:49 pm	#2
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: Philips 653 radio I guess it is worth sorting but it will want a few other bits changing. Have you checked Pauls sheets at the top right? Yes,it is up there,change the EZ80 that is missing and at least C39. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

15th Dec 2019, 3:41 pm	#3
rockinmark Heptode Join Date: Sep 2014 Location: St Albans, Hertfordshire, UK. Posts: 594	Re: Philips 653 radio Is that for the 653 4E 3D

15th Dec 2019, 3:51 pm	#4
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: Philips 653 radio It is for a 653A, I will look for other variants .No,I can only find the 653A. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

15th Dec 2019, 5:04 pm	#5
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,866	Re: Philips 653 radio There seems to be a couple of Philips models with similar numbers I take it this is the one Mark means ? https://www.radiomuseum.org/r/philip...n_6534e3d.html Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

15th Dec 2019, 8:09 pm	#6
cathoderay57 Nonode Join Date: Oct 2017 Location: Bristol, UK. Posts: 2,384	Re: Philips 653 radio The valve line-up at the RM website doesn't make sense. OK, push-pull output maybe, but not a pair of UL41s as well as a pair of EL84s surely (or am I missing something?) If all the other valves are E-series then the UL41s must be wrong methinks? No rectifier so presumably a selenium bridge rectifier? Cheers, Jerry

15th Dec 2019, 8:23 pm	#7
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,866	Re: Philips 653 radio Well worth looking at the circuit on this one Jerry, never underestimate Philips desire to baffle and bewilder I can't attach the circuit as its against radiomuseum policy but it does indeed have UL41's and EL84's I added a link but it wasn't similar on closer inspection! Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk Last edited by Cobaltblue; 15th Dec 2019 at 8:28 pm. Reason: Added link then removed

15th Dec 2019, 8:30 pm	#8
cathoderay57 Nonode Join Date: Oct 2017 Location: Bristol, UK. Posts: 2,384	Re: Philips 653 radio Hi Mike, thanks, I downloaded the page with the AF output stage. Wow, never seen anything like that before - as you say, only Philips……. Should make an interesting resto project but not simple, just looking at the switchery. Cheers, Jerry

15th Dec 2019, 8:48 pm	#9
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Philips 653 radio There's also a schematic for the BD653a here: https://www.doctsf.com/documents/aff...3544&num_fic=1 It's an 800 ohm output job. Lawrence.

15th Dec 2019, 10:28 pm	#10
rockinmark Heptode Join Date: Sep 2014 Location: St Albans, Hertfordshire, UK. Posts: 594	Re: Philips 653 radio Think this one is beyond me then, that's probably why it was put to the back of my cupboard. It must have been put there until I found someone to show me what to do with it haha it does look like a nice radio.

15th Dec 2019, 11:45 pm	#11
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,876	Re: Philips 653 radio And the UL41 is used for its heater-cathode isolation as the top part of the totem pole. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done