JIMMIE wrote:
I was going to start a valve project and wanted to purchase some hole
saws for cutting out the socket holes. What sizes will I need for 7 9
and octal sockets?

I don't remember the sizes, but holes were never sawed for tube sockets.
Instead of using saws, which are very difficult to control and make a mess
of everything, hole punches were used.

The standard brand (at least in the US) was a company called Greenlee,
which a web search says they are still in business. If you do a web search
on "greenlee punch octal socket" or replace octal with tube, you will
find several charts of which sizes to buy and people selling them.

Greenlee punchs are simple to use, you make center hole for the drive bolt.
Being much smaller than the hole you need to cut, it's easier to
make an accurate hole placement. :-)

Then you assemble the punch around the hole and tighten the drive bolt.
It cuts through the chassis accurately and then you take it out, open it
and remove the "plug".

BTW, don't repeat sending your messages. The chance of you ever seeing what
you post, or at least quickly is very small. This is USENET, not a web
forum (no matter what Google wants you to think).

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM
New word I coined 12/13/09, "Sub-Wikipedia" adj, describing knowledge or
understanding, as in he has a sub-wikipedia understanding of the situation.
i.e possessing less facts or information than can be found in the Wikipedia.