8 and 9 pin drilling templates?

[galtjunk]

Does anyone have a drilling template for the pin holes of an octal and a noval pcb mount socket?

I need to mount the sockets on a piece of fr4 in order to make some clearance so the cabinet will fit.

I am trying to build a 5 watt tube amp into a Marshall Mini Stack Lead 12 and there isn't very much room.

A visio template would be great but anything that will print to the proper size would be greatly appreciated.

Thanks

[VacuumVoodoo]

There's no "one template fits all" octal or noval pcb sockets. What make? NOS or current production? Chinese, Korean, Russian, etc? Good, in focus, photos would help to help you.

[Phil_S]

Wow! You want to push the tube pins through the FR4? Interesting.

I'd probably freehand this with a protractor and a compass or to be precise, I'd do it with a compass and a straight edge!

For an octal, it looks like 3/4" diameter. 8 holes = every 45 degrees.

For a noval, it looks like 1/2" diameter. There is one pin not there, making 10 holes every 36 degrees.

Match the drill size to the tube pin requirement.

Once you draw the circle, you'll need to find the center to use the protractor.

Youtube is loaded with videos on how to find the center:
Too much work http://www.youtube.com/watch?v=wA3GMqeyJyk
I like this better: http://www.youtube.com/watch?v=7kMFjXtAWAY
or this more traditional way: http://www.youtube.com/watch?v=YOJbWo41gU0

A few more common geometry techniques will allow you to pinpoint your divisions for 8 or 10 holes.

[galtjunk]

I don't have a socket yet.
This is what I want to do.
Look at the photo of the 12ax7 mounted sideways. It's the 4th picture.
https://tubeamparchive.com/viewtopic.ph ... dumbleator
With 2 circles of eyelets, or 1 of eyelets and one of turrets I can wire most of the sockets from the top.

[VacuumVoodoo]

That's Belton type VT9-PT
[img:300:300]http://www.epartshub.com/upload/cmpy/00 ... VT9-PT.gif[/img]

[galtjunk]

For the 9 pin Belton it's a 21mm circle with a pin every 36 degrees.

Here is a Jpeg and a visio drawing if anyone else needs it.
It it also usefull if you are building a dumbleator.

Thanks.