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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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15th Jul 2018, 1:40 pm | #21 | |
Dekatron
Join Date: Dec 2007
Location: Haarlem, Netherlands
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Re: Last Colour Sets with Rotary Tuner
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15th Jul 2018, 3:19 pm | #22 | |
Nonode
Join Date: Sep 2017
Location: Stockport, Cheshire, UK.
Posts: 2,000
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Re: Last Colour Sets with Rotary Tuner
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15th Jul 2018, 3:43 pm | #23 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
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Re: Last Colour Sets with Rotary Tuner
The government credit control restrictions had a massive effect in the TV rental trade. Granada attempted to circumvent the restrictions by offering a set with a brand new cabinet, push button tuner and 20 inch CRT, but with an ancient Thorn 850 chassis inside, with its system switching hard-wired to 625 only.
I suppose it could be argued it was the only set Granada ever manufactured "in house". Other companies did a similar thing.
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15th Jul 2018, 6:50 pm | #24 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
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Re: Last Colour Sets with Rotary Tuner
It's not surprising there are only a few, as with both rotary and push button mechanical
tuners, automatic frequency control was required - this required additional circuits that were costly prior to the designs featuring ICs. Even the tuner required a varicap diode. |
15th Jul 2018, 7:26 pm | #25 |
Heptode
Join Date: May 2006
Location: Accrington, Lancashire, UK.
Posts: 977
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Re: Last Colour Sets with Rotary Tuner
A few of you have mentioned rotary tuning, but some of the sets included are not rotary in the true sense. The KV1800 and the Baird were but some of the others were not, they had preset positions that were selected by rotating a knob. True rotary tuning tv's (no presets) were indeed rare, I had a Sanyo valved colour portable, there was also the Teleton. I would like to compile a list to supplement the ones already covered. A good post!
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15th Jul 2018, 9:14 pm | #26 |
Octode
Join Date: Apr 2007
Location: Hampshire, UK.
Posts: 1,574
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Re: Last Colour Sets with Rotary Tuner
All Sony Trinitron colour TV sets sold in the UK are numbered 'KV...' so it isn't a series as such, just what Sony call a Trinitron colour TV. The first Profeel monitors were KX..., KX-20PS1 and KX-27PS1, but they moved them over to PVM... (Professional Video Monitor) after those (Black Profeel etc). Monochrome sets were TV..., except for the Watchman portables which were FD... and TV / radio / cassette combos which were FX... For completeness, domestic VTRs were SL... (Beta), SLV... (VHS) and CCD (Camcorders with CCD pickup - most of them).
I did think of trying to compile a complete set of these prefixes but there are so many of them, although their use is surprisingly consistent. |
15th Jul 2018, 10:41 pm | #27 |
Nonode
Join Date: Sep 2017
Location: Stockport, Cheshire, UK.
Posts: 2,000
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Re: Last Colour Sets with Rotary Tuner
Mine was a KV1800.
I find some model numbers can get confused with chassis numbers by the same maker, & when companies used the same prefix at the same time, for example Ferguson & Philip using TX. |
16th Jul 2018, 6:42 pm | #28 |
Dekatron
Join Date: Apr 2005
Location: North Wales, UK.
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Re: Last Colour Sets with Rotary Tuner
I think it became clear to foreign manufacturers that the British public were not keen on infinitely variable rotary tuners, so they made variations of their TVs with push buttons. Orion, Waltham and so on did this.
Early Japanese sets still used them, such as the Hitachi CWP132, Sanyo, Toshiba and Teletons. These were mainly portable, or at least small screen sets. The clunky Hitachi 680 and so on were just a way of having a preset tuner without having to re-design the cabinet, though they soon changed their minds. The Philips NC3 mentioned above did both - it had a multi-position rotary switch - 12 way varicap plus a manual position which employed a rotary control which moved a green bar across the screen - there was a scale printed on the cabinet below the screen. This dated from the mid-Eighties and I would suggest it was the last colour TV to employ an infinitely variable tuning mechanism, although of course it was electronic in nature. |