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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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27th Nov 2022, 4:32 pm | #21 |
Heptode
Join Date: Jan 2008
Location: Shrewsbury, Shropshire, UK.
Posts: 824
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Re: English Electric TV sets
The English Electric TV's That I remember working on were mainly console models, with a mains transformer for EHT in the bottom of the cabinet.
Very dodgy to work on, but as an apprentice I was rather thrown in at the deep end! I think the aerial feed was either balanced, or had something rather crude like a choc-bloc connector. I'm pretty sure that these had a metal cone CRT. David. |
27th Nov 2022, 5:06 pm | #22 | |
Octode
Join Date: Jul 2006
Location: Solihull, West Midlands and Beaford, Devon
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Re: English Electric TV sets
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27th Nov 2022, 5:28 pm | #23 |
Pentode
Join Date: Oct 2006
Location: Brackley Northamptonshire, UK.
Posts: 240
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Re: English Electric TV sets
I had a 16T11D given to me, by my soon to be Boss, when I started as an apprentice.
It was just the chassis and had been fitted with a stand alone Pye 13 Channel Tuner unit in a brown plastic box. From what I can remember it would have been modified around the time when ITV started up and it wasn't really saleable being essentially a Band one only set so it hung around for a few years gathering dust before it was given to me. I played around with it my tiny garden shed but the smell was awful from the Corona in the damp weather. It did however look quite pretty in the dark. Some time later I noticed that both the EY51s on the LOPT had red hot Anodes and wrote to Practical Television mag for advice... I'm pretty sure if someone digs down far enough in the garden where I used to live in Didcot they'll find it! Denis
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27th Nov 2022, 6:51 pm | #24 |
Heptode
Join Date: Feb 2014
Location: Nottingham, UK.
Posts: 645
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Re: English Electric TV sets
Looking at Mikeys picture, would the metal section of the CRT been at 16Kv? so the only insulation was the plastic sheet? I don't think they would get away with that today!!
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27th Nov 2022, 8:33 pm | #25 | |
Octode
Join Date: Feb 2010
Location: Leicester, UK.
Posts: 1,431
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Re: English Electric TV sets
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Samjmann, yes the whole metal cone is at 16kV, the sheeting isn't great really but I suppose they thought engineers would know not to touch anything around there. I'm sure the earlier T900 as used in the 1501 didn't even have a plastic cover, from photos I've seen the metal cone is exposed and (in the case of the 1501) the front and top section is made of one piece of metal. |
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27th Nov 2022, 8:56 pm | #26 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: English Electric TV sets
Here's a picture of my English Electric 1550. It was bought sometime in the late 90s simply for the CRT. Needed the Cossor tube for the Baird T23. However, I was fortunate to find three Cossor 85K tubes, so the EE got a reprieve.
Now, I believe the set deserves something better than being a donor of its tube for another set. It is quite unique and a very well designed receiver. I'll drag it out tomorrow for more pictures. DFWB. |
28th Nov 2022, 10:37 am | #27 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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Re: English Electric TV sets
The 1550 and 1650 series used a separate EHT generator employing a beefed up 185BT, the 185BTA with extra insulation to prevent flashover. The EHT rectifier is a SU25, a rather large octal valve looking a bit outdated for 1950. John.
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28th Nov 2022, 10:49 am | #28 | |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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Re: English Electric TV sets
Quote:
It only appears to have been was used in the UK in very early production of two models, the Ferguson 996T and the Ferranti 17T4. Modification kits were supplied to replace these MC tubes with all glass tubes typically the MW43-64/69 or in the case of the 21" T909, the massive MW53-20. John. |
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28th Nov 2022, 11:09 am | #29 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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Re: English Electric TV sets
I have just found an Emitron valve/crt list which shows 185BT,185BTA and SU25. These
are all obviously made by Cossor. No metal crts in this 1954 list. |
29th Nov 2022, 1:00 pm | #30 |
Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: English Electric TV sets
185BT that was the one. The ones I serviced had a metal top section which must have been well earthed due to it's proximity to to the 'live' CRT.
Peter |
29th Nov 2022, 1:53 pm | #31 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: English Electric TV sets
Later 185BTA and 185BTA valves were made by Mullard.
I'm sure this valve had industrial and military applications. Attachment shows a Cossor 185BT which was made by Mullard. DFWB. |
29th Nov 2022, 3:08 pm | #32 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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Re: English Electric TV sets
An odd heater voltage and current 18V at .45amp. More like a transmitting valve. No wonder the receivers were expensive with five of them in one chassis! J.
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29th Nov 2022, 3:47 pm | #33 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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Re: English Electric TV sets
The English Electric service manual is one of the very best I have seen. Gloss paper and many photographs. Just a basic few of the 1650 series. There does not appear to be the plastic bag over the cone on this model
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29th Nov 2022, 3:52 pm | #34 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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Re: English Electric TV sets
No bag! J.
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29th Nov 2022, 7:00 pm | #35 |
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,306
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Re: English Electric TV sets
I have an advert for some I found at work in a local newspaper. £27 then is now £673!
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29th Nov 2022, 9:37 pm | #36 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: English Electric TV sets
As a follow up to the popular 16" model 16T11D, in 1953 English Electric introduced the fringe area model 16T11F.
No experience of this model but I'm sure it must have been a superb receiver. Five channel superhet with two RF amplifier stages, a self-oscillating mixer followed by two common sound and vision IF amplifier stages. Single stage vision and sound IF amplifiers. EF80 pentodes employed in the RF and IF amplifiers. No strange valves in this receiver. Flywheel line sync employing two ECC81 double-triodes. One ECC81 functions as a coincidence detector and the other as a cathode follower control valve for the blocking line oscillator. Flywheel line sync was an option in the models 1550 and 1650. Took the form of a plug-in unit which used two 6SN7GT double-triodes. Here's another unusual Cossor valve, the 142BT: http://www.r-type.org/exhib/aag0074.html DFWB. |
30th Nov 2022, 10:36 am | #37 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
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Re: English Electric TV sets
I believe EE offered a CRT reconditioning service for their metal cone tubes. It must have been a very expensive procedure when it came to man hours and delivery/collection. No wonder they threw the towel in by late 1955.
The pictures show the massive T909 21" MC tube mounted on the chassis. I think they had trouble with the 'Hoola Hoop plastic ring insulating the outer glass rim from the cone. If everything was not lined up the customer may have received a tingle from the edge of the mask or corona problems arcing to the cabinet on damp days such as we have now. Pictures show the chassis and the line up for the T40 series, I believe the last model they produced. I doubt if they made any money from TV production and were glad to see the end of it. They had better, much more profitable projects to do. |
30th Nov 2022, 10:44 am | #38 | |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
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Re: English Electric TV sets
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I'm almost sure the MC tubes were made by EE. John. |
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30th Nov 2022, 1:18 pm | #39 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
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Re: English Electric TV sets
Cossor 108K tube is of course a 10" tube not a 12"..John.
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30th Nov 2022, 4:17 pm | #40 | |
Dekatron
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Re: English Electric TV sets
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