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Old 2nd August 2009, 03:38 AM   #1
mobyd is offline mobyd  New Zealand
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Default How to cut ceramic

I have to mount two EF Johnson Jumbo 4 pin sockets (211/845 type) side by side in a space 4 millimetres less than twice the diameter of the ceramic bases of the sockets. Ideally I'd like to shave 2 mm off each side of each socket (I can bend up the connection tabs). Attacking these with the grinder produced much heat and sod all abrasion. Anyone got any idea how to do this ?.
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Old 2nd August 2009, 07:24 AM   #2
dheming is offline dheming  United States
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You could use a diamond blade similar to these on your grinder. These kind of blades are used to cut floor tiles so they should work for this.
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Old 2nd August 2009, 09:00 AM   #3
chrish is offline chrish  Australia
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I am sure that you have thought of this but...

If there is not enough space for the sockets, will there be enough room for the valves? Jones recommends separating power valves by 1 1/2 envelope widths or more. If they are to be close, careful attention to the orientation of the anodes will be required such that the minimum amount of heat radiation is transmitted to the neighbouring valve (oriented so narrow edges of anodes are adjacent and that the larger flat faces of anodes not facing each other).

Good luck!

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Old 2nd August 2009, 09:02 AM   #4
Zen Mod is offline Zen Mod  Serbia
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even if you have uncut bases positioned so tight , you'll need forced cooling - to prevent overheating of any serious tube .

in other words - they're too near
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Old 3rd August 2009, 12:38 AM   #5
jjman is offline jjman  United States
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Dremel has some "diamond" impregnated cutoff wheels. I usually find the regular cutoff wheels work better on the dremel but I've never tried to cut ceramic with a dremel.

Only diamond worked for me on ceramic floor tiles.
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