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Post by ChrisB on Aug 23, 2014 18:30:16 GMT
Here's a fascinating series of videos about the Mullard company valve factory in Blackburn, once employing thousands of workers.
Mullard Valves - The Blackburn Story - Part 1 - Works History
Mullard Valves - The Blackburn Story - Part 2 - Parts Of A Valve
Mullard Valves - The Blackburn Story - Part 3 - How A Valve is Manufactured (mica)
Mullard Valves - The Blackburn Story - Part 4 - How A Valve is Manufactured (continued: assembly)
Mullard Valves - The Blackburn Story - Part 5 - How A Valve is Manufactured (continued: glass)
Mullard Valves - The Blackburn Story - Part 6 - How A Valve is Manufactured (continued: testing)
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Post by ChrisB on Aug 23, 2014 18:34:29 GMT
Here's another, more detailed film about the manufacture of valves.
The Manufacture of Radio Valves - Presented by Mullard
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Post by ChrisB on Aug 23, 2014 18:38:55 GMT
John Pertwee advertising for Mullard!
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Post by Chris on Aug 23, 2014 18:51:28 GMT
Looking forward to watching this when I get home.
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Post by Deleted on Aug 23, 2014 19:45:25 GMT
Really fascinating stuff.
The processes that it all goes through are mind boggling.
Must try and find the history of Mullard. What the hell happened to it all. Just imagining what happened to those machines that took so much development. Hopefully they were sold on rather than just scrapped.
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Post by ChrisB on Aug 23, 2014 20:01:54 GMT
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Post by Chris on Aug 24, 2014 3:40:54 GMT
There was an article somewhere recently about a bloke visiting valve manufacturers in China. Sort but I just can't remember much more about it - maybe someone else can? I do think it was a bit of a horror story though. Loads of valves exactly the same but with different labels etc...
Gonna try and track it down and will update this if I find it.
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Post by Chris on Aug 29, 2014 4:48:23 GMT
Unbelievable amount of work.
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Post by MartinT on Sept 9, 2014 12:08:44 GMT
Brilliant. Did you ever see the video of the French guy who makes his own valves in his garage? It's an education in what can be achieved.
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Post by ChrisB on Sept 9, 2014 18:36:39 GMT
Here it is. I hope this works OK.
Slightly dodgy music but the video footage is incredible.
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Post by MartinT on Sept 9, 2014 19:22:02 GMT
Brilliant - thanks for finding it again. Worth a re-watch.
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Post by ChrisB on Sept 14, 2014 12:26:50 GMT
Here's another old piece of film about valves, this time it's from the US. Look out for the monster radio transmitting valve at about 18 minutes into the clip - 250 kilowatts!!
AT&T Archives: A Modern Aladdin's Lamp, about vacuum tubes 1940
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Post by MartinT on Sept 15, 2014 5:56:49 GMT
I'm not sure I'd like to be in the same room when firing up that valve!  |
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Post by ChrisB on Sept 15, 2014 6:02:48 GMT
Scary, eh?!
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Post by speedysteve on Sept 18, 2014 17:00:47 GMT
Great thread - I've watched the Frenchman a few times over the years:)
I've not see the Mullard vids, watched the first 2 so far... - what a snapshot in time they are!
I have in my system 16 valves in my phono stage and power amps all together
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