The Philips Style 70 Chassis

[Philips Fan]

Hi Chaps

I have started a new section of my early Philips TV website that is devoted to the Philips Style 70 chassis which made an appearance in the early 1970′s:

http://www.philipstv.org.uk/blog/ear...le-70-chassis/

Interesting electric clock/timer idea is this chassis!

I wonder, was the Philips Style 70 chassis a stop-gap between the G6 and the G8. If so, why (anyone know the thinking)? If you do know any more about this chassis or have some data/photos/blurb, please do contact me with the details. As always I would be extremely grateful.

Kind regards

Robert

[MALC SCOTT]

The style 70 chassis is mono, G6/G8 colour.

[Philips Fan]

Ah good point! Thanks Malc...

Have updated my site!

Thanks

Robert

[Steve_P]

The Style 70 appeared in 1968, not the early 1970's. It was a development of the 150 Chassis and the main difference was the fact that the boards were the other way round. They also had a pushbutton tuner on UHF rather than a rotary one.

They were a good set, but did tend to eat LOPTs.

Always change C415!

Cheers,

Steve P.

[Philips Fan]

Thank you Steve.

I shall change the text right away! If you (or anyone else) have anymore memories to share please do send them my way.

Kind regards

Robert

[Colourstar]

Hmm, I'm sure the Style 70 was a fair bit earlier than 1968. The 210 chassis had arrived by then with it's simplified (for the user) 6 pushbutton tuner, with each button capable of being preset for 405 or 625, thus eliminating manual standards-changing and reducing the number of user controls.

I reckon the Style 70 was launched in the latter part of 1965 with 1966/7 being the main production years. It also appeared under the Stella brand name too.

Steve P is right about the LOPTs though!

Steve J

[toshiba tony]

405\625 switching was still done on the main board, the only selections that were available on the tuner was band switching, band 1 or 3 and uhf, they were ideal for wired tv companies whose areas had difficult reception areas, we had one that covered the three stations on vhf at 625, repeater stations in those days were not as widespread as they are now.

[Philips Fan]

Great chaps, I'll add your info to the comments at the bottom of the page:

http://www.philipstv.org.uk/blog/ear...le-70-chassis/

Thanks

Robert

[Studio263]

Originally Posted by Colourstar

Hmm, I'm sure the Style 70 was a fair bit earlier than 1968

I agree, the version with the clock in it features in the same round-up of new TV sets in the 'Television' mag that includes the Sony TV9-306UB, late 1965.

Nice sets, but as Steve says they were LOPT gobblers.

[FERNSEH]

Absolutely certain that the style 70 series was introduced in late 1965. Service information appears in the 1966/67 Radio and Television servicing book. The info for the 19TG170A can be found on pages 427 to 441.
Those books were often one year behind the intro date of many models.
Designed and made in England but with just a little Philips strangeness to make things interesting.
Badge engineed versions: Alba T1195 and T1235. Cossor CT1976A and CT2378A and Stella ST2049 and ST2133.
The frame timebase circuit was carried forward to the 210 series. A triode connected EF80 and the triode section of the PCL85 form a multi-vibrator.

DFWB.

[dazzlevision]

Hello,

This chassis was the first to use the mixer stage of the Mullard/Philips very compact VHF turret tuner for IF preamplification on UHF/625, although the preceding range had the same tuner fitted, it was not used.

The 10 pin B10B base double pentode PFL2000 replaced the PL83 (video amplifier) and ECL80 (sync separator - pentode section) in the preceding range.

I also found the video/sound/IF panel tended to scrorch and blacken (like the panels in the Rank Bush Murphy hybrid mono sets fitted with the A640 chassis).

The Style 70 also saw the first Philips mono TV chassis with a VDR stabilised line timebase.

The LOPT, as has been said already, was very unreliable, like the 210/300 chassis that followed the Style 70 (no lessons learned there?).

Regards,

Dazzlevision

[FERNSEH]

The frame output transformer used to fail often as well.
I had lots of Style 70 sets out on rental. When it came to replace them in the late seventies I wasn't all that sorry to get rid of them. Good sets but not outstanding though. The line output transformer was a terrible thing.
The miniature tuner was designated as the AT7650. Used by many other manufactures.

DFWB

[Colourstar]

Originally Posted by FERNSEH

The line output transformer was a terrible thing.
DFWB

...but easy to replace! From memory you just popped off the EHT cap, unplugged two multi-pin connectors from the timebase pcb, undid two screws and the whole assembly slid out.

Oh and those vertical pcbs used to warp terribly due to the heat generated. I've seen some which have a profile not unlike a banana!

Steve J

[Tazman1966]

Originally Posted by dazzlevision

....I also found the video/sound/IF panel tended to scorch and blacken...

Like mine!

Incidentally, mine is date stamped August 21st 1966 - two days before I was born

[Lloyd 1985]

I've got the Stella version, the ST2049a. I did a write up many years ago on here! It's a right scruffy old thing, dragged it back from the dead, at which point it ate 2 LOPT's I did manage to make one good Lopt out of the 2 dead ones though!

They do have a good picture when working well.

Regards,
Lloyd.

[Philips Fan]

Fantastic stuff chaps. I've added all of your comment into the text/feedback section of the page.

http://www.philipstv.org.uk/blog/ear...le-70-chassis/

Kind regards

Robert

[Philips Fan]

So what replaced the Style 70 (seems the 150 was its forerunner) was it the 300 series?

BTW Did you know:

The TG170A was supplied in a Paldao veneered cabinet, lightly tinted and finished in satin polyester. Front panel was light grey or rich burgundy moulded polystyrene with leather grain finish. Control escutcheon is mirror bright aluminium with a fine linished pattern.

The TG173A was supplied in a Dark sapele veneered cabinet finished in satin polyester. Front panel was metallised blue-green moulded polystyrene. Control escutcheon is linished aluminium, while speaker grille and trim has bright silver finish.

How sad am I!

I would love to a scan of period sales blurb/photos of these for the website if anyone has anything.

Cheers

Robert

[Studio263]

Wow Taz, that's burnt to a crisp at the top on the left hand side. They used to call these PCBs "Surecool", that sure didn't work then!

[dazzlevision]

Originally Posted by Philips Fan

So what replaced the Style 70 (seems the 150 was its forerunner) was it the 300 series?

Cheers

Robert

Hello,

The Style 70 chassis was replaced by the Philips 210 series sets (such as the G19T210A, etc), which was introduced (IIRC) in 1967 and used:

a six pushbutton integrated UHF/VHF tuner (of Philips/Mullard manufacture)

tuner initially used Germanium transistors (with a small AGC translator PCB on it) but later used a Silicon tuner, with no AGC PCB

Solenoid operated system switch

Silicon transistorised IF strip

Otherwise, the circuitry was similar to the Style 70 in the audio amp, video amp/sync separator and and both timebases.

Most circuitry was on a large horizontally mounted PCB

Frame oscillator and output on a small vertically mounted PCB.

LOPT (hard wired in) and EHT rectifier located in a metal cage on bottom right hand side (and an integral part) of chassis.

Regards,

Dazzlevision

[Focus Diode]

Originally Posted by Lloyd 1985

I've got the Stella version, the ST2049a

Any chance of a photo of it please? I have fond memories of the Stella version owned by neighbours at the start of the '70s. Very attractive black/silver finish and indeed excellent picture quality.

Cheers,
Brian