Re: Who remembers how bad analogue television was?

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Sujet : Re: Who remembers how bad analogue television was?
De : joegwinn (at) *nospam* comcast.net (Joe Gwinn)
Groupes : sci.electronics.design
Date : 28. Feb 2025, 19:48:02
Autres entêtes
Message-ID : <0114sj1mr98qask23ie3kddqq9m57a08h7@4ax.com>
References : 1 2 3 4 5
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On Fri, 28 Feb 2025 17:39:46 +0000, Martin Brown
<'''newspam'''@nonad.co.uk> wrote:

On 28/02/2025 03:03, KevinJ93 wrote:
On 2/27/25 12:45 PM, Martin Brown wrote:
>
The first two colour TVs I recall owned by friends or family were
about the time of Apollo 8 in 1968. Memorable for the Earth rise shot.
Both were entirely valves and my uncle's caught fire leaving a nasty
brown burn mark on their wool carpet and smoke damage on the ceiling.
>
The earliest was at a school friends house and was in pastel shades
pre Nd glass. It was in colour but only just... Joe 90 launch was the
first programme I can recall watching there in colour. Test cards in
shops don't count.
>
I'd believe 1974 as a date for hybrid colour TVs that almost worked
correctly and didn't need a service engineer visiting them every other
week. By 1980 I'm pretty sure they were almost entirely semiconductor
based.
 
My father bought a Ferguson 19" colour TV at the end of 1970 that was
fully semiconductor (it was my first term at university and he got it
just before I came back for Christmas). It seemed to work fairly well -
he would tinker with it but I don't remember it needing any significant
repair. I gather it was one of the first such sets.
>
It was the valve ones from the mid to late 60's that were both seriously
expensive and unreliable. So much so that most people at the time rented
them since then routine service and repair was included. Enough money
was made on the TV rental business to fund a new Cambridge college.
>
https://www.robinson.cam.ac.uk/college-life/library/college-archive-and-history/sir-david-robinson
>
There were others in the same white goods and TV rental business and
several of the founders were big charity donors and philanthropists.
 
The set in the common room at university was an older valve based one
with no blue channel but it was surprisingly watchable and it didn't
>
Valve sets ran hot and somehow valves would gradually work themselves
out of sockets or just plain and simple fail at switch on. I saw one or
two very old all valve sets survive into the 80's that kept the valve
filaments warm continuously even when the set was nominally off.

I remember those days.  When in the 1970s the 1N4000-series rectifier
diodes became strong enough and cheap enough, we would bridge the
power switch with one such diode such that the filaments stayed warm
(not hot) even when the TV was off.

Joe

Date Sujet#  Auteur
27 Feb 25 * Who remembers how bad analogue television was?36Sylvia Else
27 Feb 25 +- Re: Who remembers how bad analogue television was?1Edward Rawde
27 Feb 25 +* Re: Who remembers how bad analogue television was?6Don Y
27 Feb 25 i+* Re: Who remembers how bad analogue television was?2bitrex
27 Feb 25 ii`- Re: Who remembers how bad analogue television was?1Don Y
11 Mar 25 i`* Re: Who remembers how bad analogue television was?3Joerg
12 Mar 25 i +- Re: Who remembers how bad analogue television was?1Don Y
12 Mar 25 i `- Re: Who remembers how bad analogue television was?1john larkin
27 Feb 25 +* Re: Who remembers how bad analogue television was?4Jeff Layman
27 Feb 25 i`* Re: Who remembers how bad analogue television was?3Martin Brown
27 Feb 25 i `* Re: Who remembers how bad analogue television was?2KevinJ93
2 Mar 25 i  `- Re: Who remembers how bad analogue television was?1Edward Rawde
27 Feb 25 +* Re: Who remembers how bad analogue television was?11Liz Tuddenham
27 Feb 25 i+* Re: Who remembers how bad analogue television was?9john larkin
27 Feb 25 ii`* Re: Who remembers how bad analogue television was?8john larkin
27 Feb 25 ii `* Re: Who remembers how bad analogue television was?7Lasse Langwadt
27 Feb 25 ii  +- Re: Who remembers how bad analogue television was?1john larkin
27 Feb 25 ii  +- Re: Who remembers how bad analogue television was?1Don Y
28 Feb 25 ii  +* Re: Who remembers how bad analogue television was?2Sylvia Else
28 Feb 25 ii  i`- Re: Who remembers how bad analogue television was?1Don Y
28 Feb 25 ii  `* Re: Who remembers how bad analogue television was?2Tom Del Rosso
1 Mar 25 ii   `- Re: Who remembers how bad analogue television was?1john larkin
28 Feb 25 i`- Re: Who remembers how bad analogue television was?1Sylvia Else
27 Feb 25 +* Re: Who remembers how bad analogue television was?9KevinJ93
27 Feb 25 i`* Re: Who remembers how bad analogue television was?8Martin Brown
28 Feb 25 i `* Re: Who remembers how bad analogue television was?7KevinJ93
28 Feb 25 i  +* Re: Who remembers how bad analogue television was?3Jeff Layman
2 Mar 25 i  i`* Re: Who remembers how bad analogue television was?2Edward Rawde
2 Mar 25 i  i `- Re: Who remembers how bad analogue television was?1John R Walliker
28 Feb 25 i  `* Re: Who remembers how bad analogue television was?3Martin Brown
28 Feb 25 i   +- Re: Who remembers how bad analogue television was?1Jeff Layman
28 Feb 25 i   `- Re: Who remembers how bad analogue television was?1Joe Gwinn
28 Feb 25 +* Re: Who remembers how bad analogue television was?3Don Y
28 Feb 25 i`* Re: Who remembers how bad analogue television was?2Martin Brown
28 Feb 25 i `- Re: Who remembers how bad analogue television was?1Don Y
28 Feb 25 `- Re: Who remembers how bad analogue television was?1Bill Sloman

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