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Total 29 documents matching your query.

1. [Amps] Workshop Danger (score: 1): Author: "Jim Garland" <4cx250b@miamioh.edu>; Date: Fri, 13 Sep 2013 06:24:16 -0600; My least favorite part of homebrewing an amplifier is making the meter cutouts and tube socket holes. Last evening I cut three 2.90 holes for GU-74Bs and survived the experience. I have a set of hole; /archives//html/Amps/2013-09/msg00106.html (7,943 bytes)
2. Re: [Amps] Workshop Danger (score: 1): Author: k7fm <k7fm@teleport.com>; Date: Fri, 13 Sep 2013 05:44:41 -0700; In the process of building an experimental airplane, I watched my partner cut a hole on his milling machine, which has a variable speed drive. Running at the very low speed, the large hole saw change; /archives//html/Amps/2013-09/msg00107.html (8,373 bytes)
3. Re: [Amps] Workshop Danger (score: 1): Author: Bob Sullivan <robert@isquare.com>; Date: Fri, 13 Sep 2013 08:54:53 -0400; Jim, I could not agree with you more! Fly cutters should be simply tossed away. For large holes I pay the freight and take the panel to a local machine shop. For a few dollars I get pretty large hole; /archives//html/Amps/2013-09/msg00108.html (9,054 bytes)
4. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 14:55:25 +0200; Jim, I have got from somewhere a 'circle cutter'. The difficulty with the plain fly cutter is that it is inherently unbalanced and so has a tendency to dig into the work and 'pick it up'. My circle c; /archives//html/Amps/2013-09/msg00109.html (8,531 bytes)
5. Re: [Amps] Workshop Danger (score: 1): Author: "Jim Garland" <4cx250b@miamioh.edu>; Date: Fri, 13 Sep 2013 07:11:11 -0600; Peter, Thanks for the great tip, re securing Jacob's chucks. I agree completely that using a vertical mill is by far the best solution. I've got a mill, but unfortunately it's a small one designed fo; /archives//html/Amps/2013-09/msg00110.html (10,633 bytes)
6. Re: [Amps] Workshop Danger (score: 1): Author: Conrad Farlow <conrad@g0ruz.com>; Date: Fri, 13 Sep 2013 13:12:25 +0000; For tube sized holes the Q max metal punches have always worked very well for me even on 2mm aluminium. I think that biggest one I have is 75mm. I've gone solid state now so it's less of a problem. I; /archives//html/Amps/2013-09/msg00111.html (10,069 bytes)
7. Re: [Amps] Workshop Danger (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Fri, 13 Sep 2013 09:32:30 -0400; For the creation of specialized parts and plates, I've started using the same vendor that produces my PC boards. No room for a machine shop here, and honestly, I'm not much good beyond a drill press; /archives//html/Amps/2013-09/msg00112.html (11,804 bytes)
8. Re: [Amps] Workshop Danger (score: 1): Author: donroden@hiwaay.net; Date: Fri, 13 Sep 2013 09:44:04 -0500; Ditto on using a machine shop. A trip to the doctor costs too much these days. Don W4DNR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.; /archives//html/Amps/2013-09/msg00118.html (7,651 bytes)
9. [Amps] Workshop Danger (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 13 Sep 2013 07:47:35 -0700; My least favorite part of homebrewing an amplifier is making the meter cutouts and tube socket holes. Last evening I cut three 2.90 holes for GU-74Bs and survived the experience. I have a set of hole; /archives//html/Amps/2013-09/msg00119.html (9,413 bytes)
10. Re: [Amps] Workshop Danger (score: 1): Author: TexasRF@aol.com; Date: Fri, 13 Sep 2013 11:08:30 -0400 (EDT); Oh for the good old days when we would drill a series if 1/4" holes around a circle, knock the center out with a hammer and use a half round file to clean it up. I still use that technique to make sq; /archives//html/Amps/2013-09/msg00120.html (11,451 bytes)
11. Re: [Amps] Workshop Danger (score: 1): Author: Vic K2VCO <k2vco.vic@gmail.com>; Date: Fri, 13 Sep 2013 08:36:22 -0700; I have a drill press with speeds ranging from fast to escape velocity. I've given up on hole saws, and admit that I've gone back to drilling several 3/8" holes around the periphery, joining them with; /archives//html/Amps/2013-09/msg00122.html (10,158 bytes)
12. Re: [Amps] Workshop Danger (score: 1): Author: DAVE WHITE <mausoptik@btinternet.com>; Date: Fri, 13 Sep 2013 16:39:57 +0100 (BST); That's exactly my technique too. The thought of using a fly cutter fills me with terror, they look to be about the most ill-thought-out dangerous tool imaginable. I think they're actually designed; /archives//html/Amps/2013-09/msg00123.html (11,540 bytes)
13. Re: [Amps] Workshop Danger (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Fri, 13 Sep 2013 11:45:57 -0400; I still make most of my holes that way. The (rare) exception would be when I happen to have a hole saw the correct size - or slightly under size and finish with the half round file. If I had to take; /archives//html/Amps/2013-09/msg00124.html (8,632 bytes)
14. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 17:52:20 +0200; Realistically, fly cutters are no more and no less dangerous than an end mill or slot drill. Tools and especially machine tools need to be treated with care and respect...like amplifiers. There's no; /archives//html/Amps/2013-09/msg00126.html (7,951 bytes)
15. Re: [Amps] Workshop Danger (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Fri, 13 Sep 2013 17:19:47 +0000; The more common fly cutters, purchased as Sears, Harbor Freight, etc. are not sturdy enough and flex and chatter during use. They are no problem usually when making holes in wood. But unless you have; /archives//html/Amps/2013-09/msg00130.html (11,497 bytes)
16. Re: [Amps] Workshop Danger (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Fri, 13 Sep 2013 17:37:41 +0000; Like many homebrewers, I cut my panel holes with a jigsaw, and finish them with files. The advantage: Essentially any shape and size is possible. Disadvantage: It takes a bit of practice to get nice,; /archives//html/Amps/2013-09/msg00131.html (9,547 bytes)
17. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 19:52:38 +0200; Exactly, Manfred. 73 Peter G3RZP == Message Received: Sep 13 2013, 06:38 PM From: "Manfred Mornhinweg" <manfred@ludens.cl> To: amps@contesting.com Cc: Subject: Re: [Amps] Workshop Danger Like many ho; /archives//html/Amps/2013-09/msg00133.html (9,673 bytes)
18. Re: [Amps] Workshop Danger (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Fri, 13 Sep 2013 15:52:13 -0400; I have a machine shop. ALL machine tools are dangerous. The less knowledgeable and experienced the operator, the more dangerous. However, because of its characteristics, I would rate the fly cutter a; /archives//html/Amps/2013-09/msg00137.html (12,768 bytes)
19. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 23:13:08 +0200; I too have a machine shop and I agree 100% with Roger. Especially on clothing, and NEVER wear a necktie. Always use safety goggles where appropriate, like wise ear protection. When drilling, ease the; /archives//html/Amps/2013-09/msg00141.html (8,597 bytes)
20. Re: [Amps] Workshop Danger (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 13 Sep 2013 17:21:42 -0400; I use a quality bi-metal hole saw, not some Harbor Freight junk, for meter holes. Even so, nothing lasts forever and many just cant seem to throw a worn out tool away. Carl KM1H Like many homebrewers; /archives//html/Amps/2013-09/msg00143.html (10,840 bytes)

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