Dimensions for anode cap sizes?

leadbelly · 27th March 2009, 10:23 PM

I have searched and googled but cannot find it.

Is there some reference that lists the diameters of the anode cap sizes referenced in datasheets (e.g. C1-1 C1-2 C1-3)? Trying to buy some with descriptors like "very small" and "small" is frustrating, and you can't believe the variation in what I came across described as "medium"

astouffer · 27th March 2009, 11:11 PM

The sizes are usually 1/4" 3/8" and 1/2".

aardvarkash10 · 28th March 2009, 12:09 AM

data sheet... What tube?

vinylkid58 · 28th March 2009, 12:45 AM

I see what you mean. Looking at the 6BG6GA, the data sheet lists a top cap size C1-1, Small. I measured a 6BG6G top cap which is about 0.360" in diameter, close enough to call it 3/8". One would hope the "GA" would be the same, but not going to assume it is, don't have one here to measure.

Jeff

leadbelly · 28th March 2009, 01:59 AM

Found it! It's in the RCA Handbook:
http://pmillett.com/tubedata/HB-3/Ge...aps-7_Pins.pdf

wrenchone · 28th March 2009, 03:18 AM

Alas, there are too many skirted miniatures among the sweep tubes that interest me. It's hard to find caps that fit them, and the ones that do tend to ride high because of the skirt and look dorky. What I'll probably end up doing is machining my own using glass/silicone rod stock and phosphor bronze sheet, with a set screw to keep everything nice and snug (no little inquisitive fingers in my house). I remember seeing tube caps made for these little beasts made out of phenolic with proper 4-point contacts, but that was 40 years or so ago.

leadbelly · 23rd February 2010, 03:43 PM

Does anybody have a source for tube caps for the skirted type anode caps, i.e. C1-2, C1-22, C1-33, that actually cover the skirt?

Please don't reply if you just have information on typical plate caps.

munorc · 23rd February 2010, 07:08 PM

What type of cap was used on a 7587 NuVistor? I was gifted with a bag of 7587 tetrodes and was surprised to see they actually had an anode cap? From the posted reference, it appears it would be the C1-4 type.

27th March 2009, 10:23 PM	#1
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	Dimensions for anode cap sizes? I have searched and googled but cannot find it. Is there some reference that lists the diameters of the anode cap sizes referenced in datasheets (e.g. C1-1 C1-2 C1-3)? Trying to buy some with descriptors like "very small" and "small" is frustrating, and you can't believe the variation in what I came across described as "medium" __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

28th March 2009, 12:09 AM	#3
aardvarkash10 diyAudio Member Join Date: Mar 2007 Location: Auckland, NZ	dimensions are normally shown on the data sheet... What tube? __________________ Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012

28th March 2009, 01:59 AM	#5
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	Found it! It's in the RCA Handbook: http://pmillett.com/tubedata/HB-3/Ge...aps-7_Pins.pdf __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

23rd February 2010, 03:43 PM	#7
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	Source for tube caps for skirted anode caps? Does anybody have a source for tube caps for the skirted type anode caps, i.e. C1-2, C1-22, C1-33, that actually cover the skirt? Please don't reply if you just have information on typical plate caps. __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

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27th March 2009, 11:11 PM	#2
astouffer diyAudio Member Join Date: Jun 2004 Location: Pittsburgh, crumbling wasteland	The sizes are usually 1/4" 3/8" and 1/2".

28th March 2009, 12:45 AM	#4
vinylkid58 diyAudio Member Join Date: May 2005 Location: Victoria, B.C.	I see what you mean. Looking at the 6BG6GA, the data sheet lists a top cap size C1-1, Small. I measured a 6BG6G top cap which is about 0.360" in diameter, close enough to call it 3/8". One would hope the "GA" would be the same, but not going to assume it is, don't have one here to measure. Jeff

28th March 2009, 03:18 AM	#6
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Alas, there are too many skirted miniatures among the sweep tubes that interest me. It's hard to find caps that fit them, and the ones that do tend to ride high because of the skirt and look dorky. What I'll probably end up doing is machining my own using glass/silicone rod stock and phosphor bronze sheet, with a set screw to keep everything nice and snug (no little inquisitive fingers in my house). I remember seeing tube caps made for these little beasts made out of phenolic with proper 4-point contacts, but that was 40 years or so ago.

23rd February 2010, 07:08 PM	#8
munorc diyAudio Member Join Date: Mar 2009 Location: Minnesota	What type of cap was used on a 7587 NuVistor? I was gifted with a bag of 7587 tetrodes and was surprised to see they actually had an anode cap? From the posted reference, it appears it would be the C1-4 type.

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