Search String: Display: Description: Sort:

Results:

References: [ +from:nielsen@oz.net: 44 ]

Total 44 documents matching your query.

1. Re: [Amps] nylons (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Tue, 15 Mar 2005 16:59:27 -0800
<snip> I dug around my bookshelf and found a bit of data in the ITT Reference Data for Radio Engineers (4th Edition, 1956, aka "the green bible"): Nylon 610 (polyhexamethylene-adipamide) Freq. Dielec
/archives//html/Amps/2005-03/msg00353.html (9,657 bytes)

2. Re: [Amps] nylons (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Wed, 16 Mar 2005 09:18:56 -0800
You might look for a material called rexolite. I suspect that it is available at plastic suppliers. I used it many years ago for some microwave applications. It is easily machinable, has good dielect
/archives//html/Amps/2005-03/msg00376.html (8,068 bytes)

3. Re: [Amps] nylons (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Wed, 16 Mar 2005 09:24:29 -0800
I thought rexolite was fairly easy to machine (at least the machinists where I worked didn't complain when we had them fabricate some parts from it, but maybe they liked challenges.) I retract that p
/archives//html/Amps/2005-03/msg00377.html (9,327 bytes)

4. Re: [Amps] Bird Element Calibration? (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Sun, 20 Mar 2005 08:31:32 -0800
Somewhere I have a copy of "Theory of Error," written by W0JF, formerly of the National Bureau of Standards. This was a textbook for a class I took 40+ years ago and covers the subject quite adequate
/archives//html/Amps/2005-03/msg00434.html (8,348 bytes)

5. Re: [Amps] Bird Element Calibration? (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Fri, 25 Mar 2005 08:07:24 -0800
The Hewlett-Packard Calorimeter I used at Hughes Aircraft in the early 1960s was much faster than that. It didn't take much longer to make a measurement than using a bolometer-type meter--not instant
/archives//html/Amps/2005-03/msg00552.html (8,996 bytes)

6. Re: [Amps] Bird Element Calibration? (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Fri, 25 Mar 2005 10:26:10 -0800
True, in fact we did use directional couplers as well as attenuators. I don't recall HP having coaxial couplers until later, but we used their waveguide couplers as well as coax units made by Narda a
/archives//html/Amps/2005-03/msg00556.html (10,407 bytes)

7. Re: [Amps] MLA-2500B Question (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Tue, 29 Mar 2005 13:28:15 -0800
I don't know if it used much anymore, but recall that some of the early linear amp designs used a high-wattage 50 ohm resistor at the input. This meant that much more drive power was required, but it
/archives//html/Amps/2005-03/msg00704.html (7,807 bytes)

8. Re: [Amps] SB220 input alignment (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Mon, 02 May 2005 08:02:57 -0700
You can find the manual here: ftp://bama.sbc.edu/downloads/heath/sb220/ You will need a djvu viewer, which you can find at <http://www.djvuzone.org>. 73, Bob N7XY ____________________________________
/archives//html/Amps/2005-05/msg00004.html (7,602 bytes)

9. Re: [Amps] Strip-X enamel wire stripper (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Tue, 10 May 2005 11:32:02 -0700
Strip-X is a mixture of methylene chloride, phenol and ammonia with inert thickeners: http://www2.itap.purdue.edu/msds/docs/1451.pdf I haven't seen the stuff in years. I imagine the EPA or OSHA had p
/archives//html/Amps/2005-05/msg00152.html (7,058 bytes)

10. Re: [Amps] Alpha 78 (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Wed, 25 May 2005 21:10:04 -0700
Practically any paint store should be able to do this. Bob, N7XY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amp
/archives//html/Amps/2005-05/msg00299.html (7,546 bytes)

11. Re: [Amps] Cheap network analyser on eBay (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Sat, 25 Jun 2005 18:21:33 -0700
The TAPR VNA (not available yet) appears to have GPL'd Windows source available <http://www.tapr.org/kits_vna.html>. I think TAPR has abandoned plans to kit this, but Ten-Tec plans to have assembled
/archives//html/Amps/2005-06/msg00243.html (10,656 bytes)

12. Re: [Amps] AL 811 (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Tue, 12 Jul 2005 22:17:36 -0700
Ameritron sells a PIN diode switch which can be used with the AL-811 (QSK-5, $349 list price). This looks a bit pricey to me, but it is a plug 'n' play solution. Bob, N7XY ___________________________
/archives//html/Amps/2005-07/msg00137.html (6,511 bytes)

13. Re: [Amps] Metric system (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Fri, 5 Aug 2005 11:57:47 -0700
I recall back in the late 1970s Hughes Aircraft bid on some military programs which required all drawings to be metric. The government later dropped that requirement. Interstate 19 between Tucson and
/archives//html/Amps/2005-08/msg00190.html (9,211 bytes)

14. Re: [Amps] Fraudulent email to amps posters (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Sat, 6 Aug 2005 18:40:53 -0700
I have an address which I only used for a few tests, never to a list and ven it gets spam, so changing your address may not do a lot of good, except temporarily. Today I received some spam addressed
/archives//html/Amps/2005-08/msg00230.html (8,353 bytes)

15. Re: [Amps] caps SB200 (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Sun, 14 Aug 2005 12:13:23 -0700
Try Harbach Electronics <http://www.harbachelectronics.com>. He sells the set of caps separately, as well as a replacement board with caps and diodes. Bob, N7XY ______________________________________
/archives//html/Amps/2005-08/msg00495.html (6,872 bytes)

16. Re: [Amps] Suggestions for new Alpha Owner? (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Wed, 28 Sep 2005 09:47:16 -0700
I don't have an Alpha, but it would seem to be feasible to construct a replacement plate choke with a series resonance above 30 MHz, permitting use of the amplifier on 12 (and hopefully 10) meters. O
/archives//html/Amps/2005-09/msg00353.html (8,294 bytes)

17. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Thu, 13 Oct 2005 18:04:16 -0700
_. ___ __..__ _ .... .. ... .. ... _._. ___ _.. . _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-10/msg00335.html (9,964 bytes)

18. Re: [Amps] 220VAC Wiring info for SB-220 (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Thu, 13 Oct 2005 18:13:29 -0700
A redrawn schematic (in two parts) is at <http://www.n0ss.net/ inedex.html#SB220>. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/ma
/archives//html/Amps/2005-10/msg00336.html (7,825 bytes)

19. Re: [Amps] Best RF-Ground Story (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Sat, 15 Oct 2005 08:03:46 -0700
I think that must have been in an April issue. Could the author possibly have been Larson E. Rapp, WIOU? Bob, N7XY _______________________________________________ Amps mailing list Amps@contesting.co
/archives//html/Amps/2005-10/msg00409.html (9,822 bytes)

20. Re: [Amps] schematic software? (score: 1)
Author: Bob Nielsen <nielsen@oz.net>
Date: Tue, 1 Nov 2005 15:05:32 -0800
The light version of Eagle is freeware. It is limited in size of board layouts and schematics are limited to one sheet. It is available for Windows, Linux or Mac from <http://www.cadsoftusa.com/ free
/archives//html/Amps/2005-11/msg00015.html (7,600 bytes)

Current List: 1 - 20
Page: [1] [2] [3]
This search system is powered by Namazu