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Old January 2nd, 2008, 11:30 AM   #5 (permalink)
Freight Twang
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Join Date: Dec 2007
Location: Montgomery,Al
Age: 40
Posts: 111
You can use a metal holesaw bit, you can get at Home Depot or Lowe's, but the best way is with a GreenLee punch. The cheapest place to get on of those is a www.tubesandmore.com. the 7/8" does the 12ax7 sockets and the 1" does the output socket.
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