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Total 15 documents matching your query.

1. [AMPS] coil form plastics (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Fri, 12 Feb 1999 13:07:59 -0700; To: <amps@contesting.com> Delrin is an acetyl resin, does make a nice 60 Hz insulator, thats about it. And it is quite hydroscopic to boot! One would be asking for big trouble to use it over a few KV; /archives//html/Amps/1999-02/msg00336.html (11,317 bytes)
2. [AMPS] coil form plastics (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 12 Feb 99 14:15:31 -0600; Rexolite is also outstanding for making circuits with. You can literally cut a grove with just a box knife in copper clad boards and the peel off the copper you don't want leaving you a nice microst; /archives//html/Amps/1999-02/msg00338.html (8,725 bytes)
3. [AMPS] coil form plastics (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Fri, 12 Feb 1999 17:19:16 -0500; On Fri, 12 Feb 1999 13:07:59 -0700 "John T. M. Lyles" <jtml@lanl.gov> writes: SNIP MFJ owners, like Clinton supporters are known for loyalty, not brains. OEP switched to Delrin when their ceramic cor; /archives//html/Amps/1999-02/msg00343.html (9,600 bytes)
4. [AMPS] coil form plastics (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 13 Feb 1999 09:31:07 +0000; Probably by not using it in situations of high RF stress (voltage gradient) or high temperature. I've managed to melt Delrin by putting it in a particularly stupid place in a 144MHz PA running only 2; /archives//html/Amps/1999-02/msg00357.html (11,174 bytes)
5. [AMPS] coil form plastics (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Sat, 13 Feb 1999 15:06:34 -0700; Hi Ian & all... For what it's worth, my experience is that Delrin is an excellent rf insulator, with very low loss at least in the HF range. It has reasonable mechanical stability (like nylon and unl; /archives//html/Amps/1999-02/msg00362.html (14,049 bytes)
6. [AMPS] coil form plastics (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 13 Feb 1999 17:16:09 -0800; ? The characteristics table for Delrin indicates that it has a substantively higher Dissipation-factor than ABS and polyethelyne. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -; /archives//html/Amps/1999-02/msg00368.html (8,461 bytes)
7. [AMPS] coil form plastics (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sun, 14 Feb 1999 07:37:15 +0000; Radiospares/Electromail over here. Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amp; /archives//html/Amps/1999-02/msg00370.html (8,286 bytes)
8. [AMPS] coil form plastics (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 14 Feb 1999 11:28:09 +0000; ... I think Dick's examples illustrate the point very well - it's much more about *where* you use it than the material you choose. Unfortunately it's not much more than an intuition based on my physi; /archives//html/Amps/1999-02/msg00372.html (10,620 bytes)
9. [AMPS] coil form plastics (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 14 Feb 1999 06:35:24 -0800; ? Ian: I did not and do not suggest that heat from contact with the wire causes any of the Delrin bubbling observed by users of MFJ tuners. . ? I found out that Nylon, PVC, and Delrin had a Dissipat; /archives//html/Amps/1999-02/msg00373.html (11,567 bytes)
10. [AMPS] coil form plastics (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Sun, 14 Feb 1999 14:11:45 -0500; SNIP B&W initially used ceramic forms for their 802 plate RFC. As a cost reduction they went to Delrin. I have several failed Delrin RFC's here that all failed at the tube end only which makes me bel; /archives//html/Amps/1999-02/msg00378.html (9,925 bytes)
11. [AMPS] coil form plastics (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 15 Feb 1999 00:05:05 +0000; Yes, it is clear that external heating could not cause the internal bubbling. But that tells you nothing about whether they will work well enough in a particular situation. As Dick has pointed out, t; /archives//html/Amps/1999-02/msg00387.html (9,761 bytes)
12. [AMPS] coil form plastics (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 15 Feb 1999 00:18:09 +0000; Fair enough - anything involving high RF potentials (and probably high temperatures too) is a risky application that would need careful testing before committing to production. It's more difficult fo; /archives//html/Amps/1999-02/msg00388.html (9,936 bytes)
13. [AMPS] coil form plastics (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 15 Feb 1999 03:31:02 -0800; ? Dissipation-factor provides a fair clue as to whether or not there is likely to be a dissipation problem in the presence of RF. ? Reduce the RF potential-gradient to a low enough value, and Nylon; /archives//html/Amps/1999-02/msg00398.html (9,843 bytes)
14. [AMPS] coil form plastics (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Mon, 15 Feb 1999 13:17:40 -0500; Ian, IPM is one mfg and available locally from Plastics Supply Corp which I believe is USA wide. There are probably several others that stock but today is a holiday and I've been unable to get more i; /archives//html/Amps/1999-02/msg00408.html (11,309 bytes)
15. [AMPS] coil form plastics (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Tue, 16 Feb 1999 11:11:36 -0700; Ian.. Catalogs from U.S. sources such as Dayton Plastics, Regal Plastics and Cadillac Plastics (and probably scores more by now) listed "glass-filled Teflon." I've never tried it. In a similar vein,; /archives//html/Amps/1999-02/msg00426.html (9,496 bytes)

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