Can anyone confirm the 811a top cap size ?
Data sheets list it as medium, but other web sites suggest it's large.
I have 3/8" to hand but the bigger 9/16" I don't.
9/16" = 14.3mm = 0.56"
811a top cap size
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#1 811a top cap size
The only thing necessary for the triumph of evil is for good men to do nothing.
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#2
Phil the data sheet I have says it's a JEDEC No C1-5. If that means anything to anyone?
Here's the link to the datasheet. Dims of valve on page 6
http://www.mif.pg.gda.pl/homepages/fran ... 8/811A.pdf
Here's the link to the datasheet. Dims of valve on page 6
http://www.mif.pg.gda.pl/homepages/fran ... 8/811A.pdf
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#3
Thanks Colin.
I'm now fairly sure it is the 9/16" sized ones, so HFC here I come.
I'm now fairly sure it is the 9/16" sized ones, so HFC here I come.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
#4
Phil,
to add confusion the Amperex data sheet for 811 says it's 0.566" +/- 0.007"
Link to datasheet, see page 2 : http://tubedata.tigahost.com/tubedata/s ... /8/811.pdf
to add confusion the Amperex data sheet for 811 says it's 0.566" +/- 0.007"
Link to datasheet, see page 2 : http://tubedata.tigahost.com/tubedata/s ... /8/811.pdf
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#5
Yep, that's right Colin.Toppsy wrote:Phil,
to add confusion the Amperex data sheet for 811 says it's 0.566" +/- 0.007"
Link to datasheet, see page 2 : http://tubedata.tigahost.com/tubedata/s ... /8/811.pdf
9/16" = 14.3mm = 0.56"
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#7
Not exactly, cos the Egyptian Royal cubit was between 523mm and 529mm so not an EXACT length.Mike H wrote:Also, 0.027 Egyptian royal cubits.
Have you got a very old exercise book with all those defunct measurements on the back cover ?
I think the railways still use miles and chains (66 feet - 80 per mile) for measuring distances.
The only thing necessary for the triumph of evil is for good men to do nothing.
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Edmund Burke
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#8
Nah 'twas Google.
No not exact, so I opted for 526 as an average.
Shame about the royal cubit, our dimensions could have been written with a touch of class
No not exact, so I opted for 526 as an average.
Shame about the royal cubit, our dimensions could have been written with a touch of class
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