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Old 21st Feb 2023, 1:59 pm   #1
trobbins
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Default Why is the CV1068 stabiliser valve so heavy !

Am just looking at a 10E/11449 cold-gas stabiliser valve, aka a CV1068. It's not the four internal stacked 70V regulator sections that amaze me, but rather the weight of the beast. I haven't come across such a heavy glass enveloped valve before. Maybe the internal metal can configuration is nested, sort of like a microphone transformer with multiple mu-metal screens.

Is the AM crown logo from marconi-osram ? This valve has a paper square glued to the glass for maker/model info - I guess a cold-gas stabiliser makes that practical.

I'll post a photo tomorrow, as I can't easily identify one on the internet with the same paper logo patch.
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Old 21st Feb 2023, 2:38 pm   #2
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Default Re: Why is the CV1068 stabiliser valve so heavy !

Pic etc. here (albeit with different label etc.): http://www.r-type.org/exhib/abh0209.htm
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Old 21st Feb 2023, 2:39 pm   #3
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Default Re: Why is the CV1068 stabiliser valve so heavy !

Another pic, with same (?) logo, albeit not on paper: http://img.over-blog.com/492x600/3/4...-10E-11449.jpg
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Old 21st Feb 2023, 2:42 pm   #4
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Default Re: Why is the CV1068 stabiliser valve so heavy !

"Is the AM crown logo from marconi-osram ?"

Isn't that just the standard Air Ministry logo from that era?

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Old 21st Feb 2023, 11:40 pm   #5
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Default Re: Why is the CV1068 stabiliser valve so heavy !

Yes it's the Air Ministry logo - thanks. There is a glass marking " M.C. 12255 " but I can't seem to easily identify that.
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Old 22nd Feb 2023, 7:58 am   #6
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Default Re: Why is the CV1068 stabiliser valve so heavy !

I have some similar valves, though not the 10E as used on Navy electronics and they are indeed heavier than any other valve I've come across, more like a hand grenade than a valve.

Andy.
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Old 22nd Feb 2023, 8:07 am   #7
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Default Re: Why is the CV1068 stabiliser valve so heavy !

They're also rather top-heavy, so I can't see them being used in anything subject to shock or vibration, even with support of the bulb.

David
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Old 22nd Feb 2023, 8:51 am   #8
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Default Re: Why is the CV1068 stabiliser valve so heavy !

Yes a hand-grenade is a fitting description !

I know that some forms of gas mixture for regulators included a titch of radioactive gas content, but that was about my limit to plausible reasons for the weight, apart from some hefty internal compartments for the four sections.
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Old 22nd Feb 2023, 11:09 am   #9
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Default Re: Why is the CV1068 stabiliser valve so heavy !

It's a heavy valve, there was one in my Marconi CR150 comms. receiver, another heavy valve for its size was a 6080 which I had in a PSU.

Lawrence.
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Old 22nd Feb 2023, 12:05 pm   #10
Jeremy M0RVB
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Default Re: Why is the CV1068 stabiliser valve so heavy !

I dismantled one ages ago: https://valvecollector.uk/cv1068.htm
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Old 22nd Feb 2023, 1:32 pm   #11
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Default Re: Why is the CV1068 stabiliser valve so heavy !

Super page - Babushka nesting anodes !
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Old 23rd Feb 2023, 7:46 am   #12
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Default Re: Why is the CV1068 stabiliser valve so heavy !

I have two types, some are NS2's and the other's maybe 100E's, both have only two wires though so the anodes must be commoned.

Andy.
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Old 24th Feb 2023, 5:20 pm   #13
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Default Re: Why is the CV1068 stabiliser valve so heavy !

Herewith a photo of an STV280/80 bearing the Marconi badge of that period .

The Naval identity is NS1 , the NS2 being a single-gap type .

Laurie.
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