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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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1st Sep 2014, 9:26 am | #141 |
Nonode
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,562
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Re: Favourite Colour Televisions.
Hi.
They were the ITT sets fitted with the CVC25, CVC30, CVC32 modular chassis. The remote control was ultrasonic. Excellent sets, the main problem I had was tripler failure causing the power supply to trip. Sometimes, the tripler could ruin the LOPT but I think that was mainly on early versions. A leaky line output transistor causing tripping cropped up on a few occasions as well. I used to disconnect the base and emitter leads and check for leakage after wasting time looking elsewhere for the problem. Dry joints were common. The mains switch wiring was a safety issue and involved fitting jumper wires because of solder joint embrittlement. The Pressac connector on the convergence tolerance board could arc around the line scan coil pins, again a safety issue. Other common dry joints were of course in the line output stage and the decoder board had problems with it's soldering around the metal frame and earth lands causing all kinds of intermittent faults. Despite all this, they were a great set for servicing and gave a very nice picture. The CVC30 and CVC32 were the 20AX versions using 26" and 22" tubes respectively. The CVC25 used an Hitachi 22" PIL tube, though I never came across one. EDIT: Just to add, the service manuals were also excellent making servicing that much easier. Regards Symon. Last edited by Philips210; 1st Sep 2014 at 9:38 am. |
1st Sep 2014, 12:52 pm | #142 |
Nonode
Join Date: Jan 2004
Location: 1966-1976 Coverack in Cornwall and Helston Cornwall. 1976-present Bristol/Bath area.
Posts: 2,965
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Re: Favourite Colour Televisions.
I can remember tripler problems on these sets. Some of the early models also suffered from a sound sibilants fault. I seem to remember ITT having several attempts at clearing this fault with modification to the sound output stage and 6Mhz inter carrier sound IF.
But yes ITT's first all solid state sets were well liked by both engineers and customers.
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Simon BVWS member Last edited by Hybrid tellies; 1st Sep 2014 at 12:57 pm. |
1st Sep 2014, 8:09 pm | #143 |
Heptode
Join Date: Nov 2008
Location: North Walsham, Norfolk, UK.
Posts: 899
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Re: Favourite Colour Televisions.
Ones I hated were those 'orrible AVS2000 heaps that fidelity made, hard wires that fell off, output chips that blew if you breathed too hard and a remote control system that did whatever it fancied in a random way, LOPT's with a life measured in months not to mention the sheer bulk of getting these brutes onto the bench to change them oh and the picture quality left a lot to be desired.
My favorites for picture quality were those little fat ITT portables that gave a really crisp picture. but were pretty heavy to lug about don't remember the chassis number |
1st Sep 2014, 9:23 pm | #144 | |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Favourite Colour Televisions.
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Fantastic little set. Made about 1980. ITT made quite a number small screen portables. There was one which had a tiny chassis, something we thought was truly wonderful in 1979/80. DFWB. |
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1st Sep 2014, 9:32 pm | #145 | ||
Heptode
Join Date: Jan 2008
Location: Oslo, Norway.
Posts: 632
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Re: Favourite Colour Televisions.
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When I first saw a 1820 I feared that it would be more of the same. Luckily it wasn't. The 1820 and other sets with the same chassis are my favorite Sony sets. That was fast improvement. |
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2nd Sep 2014, 8:43 am | #146 | |
Octode
Join Date: Jan 2006
Location: Borough of Gateshead, UK.
Posts: 1,420
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Re: Favourite Colour Televisions.
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Speaking of portables giving excellent picture quality I also rate the Philips/PYE KT3 from the early '80s. We've been using a white PYE version in the bedroom via a UHF modulator over the past few weeks with excellent results. I'll upload a couple of photos in due course. Brian |
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2nd Sep 2014, 9:35 am | #147 |
Nonode
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,562
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Re: Favourite Colour Televisions.
Hi
I also liked the ITT colour portables. Their 16" set from about 1978 gave excellent results. This set had the CVC40 chassis which was a smaller version of the CVC32. The CVC40 had a diode split transformer with screened EHT lead similar to the Philips G11. The programme selector switches could be tetchy but it was sometimes possible to clean them successfully. The modular construction made them a joy to work on. The Philips KT2 and KT3 were of similar construction. Does anyone remember the Philips KT2? One thing I remember about these sets, and many others from 1970's was the whistles and whines from the various wound components mainly in the line output stages. This I think is known as magnetostriction due to looseness of the core material in the coil. ISTR a cure was to use Resin W PVA as recommended by ITT. I was wary about using water based adhesives to do this and used Araldite instead. Happy days. Regards Symon. |
2nd Sep 2014, 9:55 am | #148 | |
Nonode
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,562
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Re: Favourite Colour Televisions.
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I think the Sony KV1810 fitted into the category of either love it or hate it. When it was working, the picture quality was first rate but once those gate controlled switches (GCS devices) went short circuit then the real problems started. It wouldn't have been so bad if they weren't so expensive. A variac was essential when servicing these sets. Apart from the power supply hassle, not much else gave many problems. I would say they were probably the most feared of all TVs. Regards Symon. |
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2nd Sep 2014, 11:10 am | #149 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Favourite Colour Televisions.
There's me always saying I didn't have any favourite colour sets from the old days and I've mentioned three already, the compact Baird 19" M712 console, the Pye CT70/71 and those ITT portables from the early eighties.
The ITT CVC40 was a brilliant design, it was reliable and I remember testing the set for it's power consumption, an impressive 40 watts at low brightness settings. That's pretty good by any standards. One of the last British made ITT sets as well. CVC40 chassis was made for 20" PIL tubes and the CVC45 for the 22" PIL tubes. The chassis even had the old style KB type and serial number label. DFWB. |
2nd Sep 2014, 12:10 pm | #150 |
Nonode
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,562
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Re: Favourite Colour Televisions.
Back in early 1985, I built a TV using a CVC40 chassis from Sendz components. The chassis supports came from an old CVC30 set scrapped at Rediffusion. The 16" tube came from Chromavac. The cabinet was a challenge but I managed to achieve a presentable result. I used Formica to give a durable finish.
I made up the remote control system using the Mullard SAA5012 ic. Teletext was later added using a Mullard VM6101 board again from Sendz. I wonder if my home built CVC40 set was the only one to have teletext as I don't remember ITT offering text with this chassis fitted. One thing I do remember was they had a separate Viewdata system that was used with the CVC40. RGB data insertion being done in the video output stages. Wish that I still had that set. Pin sharp picture as I remember. Regards Symon. |
2nd Sep 2014, 7:27 pm | #151 |
Octode
Join Date: Jan 2006
Location: Borough of Gateshead, UK.
Posts: 1,420
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Re: Favourite Colour Televisions.
As promised some pics of the Pye KT3 portable taken earlier. Remember that switch off spot (bit over exposed on the camera)?
A great set. Cheers, Brian |
2nd Sep 2014, 8:08 pm | #152 |
Heptode
Join Date: Jan 2008
Location: Oslo, Norway.
Posts: 632
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Re: Favourite Colour Televisions.
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3rd Sep 2014, 12:11 am | #153 | |
Dekatron
Join Date: Aug 2006
Location: Madrid, Spain / Wirral, UK
Posts: 7,484
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Re: Favourite Colour Televisions.
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There was even a video game that could plug into that slot, pretty novel for the late 70s. Not sure if they were widely available in Uk or not. Attached a few scans of the manual. May jog a few memories.
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Regards, Ben. |
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3rd Sep 2014, 12:15 am | #154 | |
Dekatron
Join Date: Aug 2006
Location: Madrid, Spain / Wirral, UK
Posts: 7,484
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Re: Favourite Colour Televisions.
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I have a manual /mechanical version of that set, not long ago I came across the carcass of a remote version and am thinking about fitting the remote panel into the manual set. Anyone ever do that?
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Regards, Ben. |
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3rd Sep 2014, 12:53 am | #155 |
Tetrode
Join Date: Mar 2014
Location: Mansfield, Nottinghamshire, UK.
Posts: 51
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Re: Favourite Colour Televisions.
Think it has been mentioned earlier in this thread, my favourite would have been the 'Funky 711,.... nice pop out convergence tray,. and the touch switch channel change,....nice slide out, swing down panels for engineer access, and pretty fair sound.....
My hates were the BRC2000 a local farmer had, (Palterton, near Chesterfield, J29, M1) which he wasn't going to update, for love nor money,.... and a couple of G6s,..... (one or two of the senior engineers had convinced this gullible 19 year old, (early 70's!!) that I would end up sterile if I visited more than 2 in a fortnight!!!!! ( No names, but step forward, Dave Pells, {G4DTP}, and Ray Evans, {G4AGE}, Baskills TV, ) Cheers, Fred {G8ZWI, G4ZWI} |
3rd Sep 2014, 7:44 am | #156 |
Heptode
Join Date: Oct 2007
Location: Birmingham, West Midlands, UK.
Posts: 615
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Re: Favourite Colour Televisions.
How about Tandberg CTV1 hybrid sets? Super picture, class A sound output with 2 tone controls, sounded superb. Good quality minor components. The usual problems were related to valves and heat causing dry joints on valve bases or resistors. The pain with them was a lack of AGC, the tuner carbon tracks were fine when new but needed to be perfect to keep stable tuning. We rented loads of them out and they make life easy for us
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3rd Sep 2014, 1:59 pm | #157 | |
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,820
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Re: Favourite Colour Televisions.
And here. I had a 16" manual portable with "Property of Crest Hotels" branded into the side of it, found by a bin in Birmingham in the mid-1990s as a student. I was going on a romantic-ish evening out with a young lady, but it was too good an opportunity to miss, so I grabbed it and carted it around all night! There was a lot wrong with it (Tripler, LOP transistor and a handful of other smaller faults) but the picture was absolutely first rate when I'd repaired it, and remained so for many years until my parents chucked it.
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N. |
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7th Sep 2014, 10:51 am | #158 | |
Nonode
Join Date: Oct 2010
Location: Gloucester, Glos. UK.
Posts: 2,149
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Re: Favourite Colour Televisions.
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I never knew they even existed! Now where can I possibly get one from? Probably impossible now , |
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7th Sep 2014, 11:07 am | #159 |
Dekatron
Join Date: Aug 2006
Location: Madrid, Spain / Wirral, UK
Posts: 7,484
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Re: Favourite Colour Televisions.
About ten years ago I saw a tatty one at a fleamarket, but they wanted 30€ for it so I left it. I think the seller probably imagined it was a standalone unit, not knowing that without one of those ITT sets it was useless!
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Regards, Ben. |
7th Sep 2014, 10:14 pm | #160 | |
Hexode
Join Date: Mar 2013
Location: Coventry, West Midlands, UK.
Posts: 279
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Re: Favourite Colour Televisions.
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Don't remember the model number but it had a walnut-finish cabinet and I would know it if I saw it again. The only thing which let it down was the rather boomy audio.
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