Philips 20" G8 colour receiver 1977. - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

agardiner · 16th Oct 2021, 8:58 am

Same here. Never saw a G8, only the G11. Must have been super reliable.

Welsh Anorak · 16th Oct 2021, 9:28 am

They were the run-out model so had all the mods done - contrast that with the Pye hybrid which got worse as production went on! They were also fairly thin on the ground unlike the ubiquitous 22" 550.
The Pye solid state 20" was nothing special but having a 90 degree CRT (A51-220X) was far more reliable than their big brothers. Again, thin on the ground as a few extra pounds bought you a 22" version.
I vaguely remember a 20" T20 now you mention it - it was the first one I saw with the unusual final anode location.

Heatercathodeshort · 30th Oct 2021, 10:33 am

Thanks to Mickey 66 I have the correct value 3rd harmonic tuning caps to replace the now unreliable green type originally fitted.
I have set up the line timebase output balance and all is quiet and cool. These green capacitors were also used in the GEC solid state chassis and maybe discovered in Thorn 8000/9000 series. When they go O/C they destroy the line output transistor and can also damage the tube. Replace on sight!
Thanks M. Regards, John.

standing wave · 30th Oct 2021, 11:00 am

Remember them well. Rediffusion, Redihire bought loads of these for rental and sale. Always worked first time out of the box and virtually no setting up unlike some other manufacturers models. And always gave a superb picture.
Terry

16th Oct 2021, 8:58 am	#21
agardiner Octode Join Date: Sep 2020 Location: Thetford, Norfolk, UK. Posts: 1,741	Re: Philips 20" G8 colour receiver 1977. Same here. Never saw a G8, only the G11. Must have been super reliable.

16th Oct 2021, 9:28 am	#22
Welsh Anorak Dekatron Join Date: Apr 2005 Location: North Wales, UK. Posts: 6,921	Re: Philips 20" G8 colour receiver 1977. They were the run-out model so had all the mods done - contrast that with the Pye hybrid which got worse as production went on! They were also fairly thin on the ground unlike the ubiquitous 22" 550. The Pye solid state 20" was nothing special but having a 90 degree CRT (A51-220X) was far more reliable than their big brothers. Again, thin on the ground as a few extra pounds bought you a 22" version. I vaguely remember a 20" T20 now you mention it - it was the first one I saw with the unusual final anode location. __________________ Glyn www.gdelectronics.wales

30th Oct 2021, 10:33 am	#23
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Philips 20" G8 colour receiver 1977. Thanks to Mickey 66 I have the correct value 3rd harmonic tuning caps to replace the now unreliable green type originally fitted. I have set up the line timebase output balance and all is quiet and cool. These green capacitors were also used in the GEC solid state chassis and maybe discovered in Thorn 8000/9000 series. When they go O/C they destroy the line output transistor and can also damage the tube. Replace on sight! Thanks M. Regards, John. Attached Thumbnails

30th Oct 2021, 11:00 am	#24
standing wave Pentode Join Date: Sep 2006 Location: Tipperary, Ireland Posts: 121	Re: Philips 20" G8 colour receiver 1977. Remember them well. Rediffusion, Redihire bought loads of these for rental and sale. Always worked first time out of the box and virtually no setting up unlike some other manufacturers models. And always gave a superb picture. Terry