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1. [Amps] Schematic Program (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Sat, 17 Aug 2002 08:58:21 -0400; Al: You could try http://www.pcb123.com I have not used it to make a board yet, but it has a schematic capture program and a PC layout program... I have made a simple schemo with and seems to work ok; /archives//html/Amps/2002-08/msg00147.html (7,479 bytes)
2. [AMPS] SWR Protection (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Fri, 1 Dec 2000 12:27:44 -0500; Absolutely agreed, Dave. For microprocessor coding using integers, there is an easier algorithm that leaves out the square root (and makes it compute WAY faster): ((Forward A/D + Reflected A/D) * 100; /archives//html/Amps/2000-12/msg00014.html (10,568 bytes)
3. [AMPS] SWR Protection (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Sun, 3 Dec 2000 23:23:09 -0500; Steve: Without reading that site in complete detail, I believe he's saying that he used a MAX-186 12 channel a/d converter connected to a Basic Stamp. This is an 8 channel multiplexed a/d converter.; /archives//html/Amps/2000-12/msg00052.html (11,045 bytes)
4. [AMPS] SWR Protection (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Mon, 4 Dec 2000 00:03:50 -0500; Oops... 8 channel a/d!!!! Not 12!!!! It's also a 12 bit unit - way more than you need! Bruce Steve: Without reading that site in complete detail, I believe he's saying that he used a MAX-186 12 chann; /archives//html/Amps/2000-12/msg00053.html (11,622 bytes)
5. [AMPS] Thanks & PC Board (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Sun, 26 Nov 2000 23:17:27 -0500; Jeff: Go to http://www.expresspcb.com and look around - you get a free double sided layout package for Windows and you order boards, very reasonably priced, over the Internet. Delivery is measured in; /archives//html/Amps/2000-11/msg00381.html (8,119 bytes)
6. [AMPS] Bird meters (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Mon, 2 Oct 2000 07:09:09 -0400; Peter: The elements most of us use require a 30 microamp meter. We have connected them to an amplifier and a-to-d using resistors to present this load. They mark the meter face to achieve the transla; /archives//html/Amps/2000-10/msg00022.html (9,814 bytes)
7. [AMPS] High-SWR protection (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Mon, 30 Oct 2000 15:07:38 -0500; Hi All: Our Website is NOT intended to offer a complete treatise on station and amplifier design. There are lots of places (like this one, for sure!) to go to get all kinds of different information o; /archives//html/Amps/2000-10/msg00687.html (12,484 bytes)
8. [AMPS] High-SWR protection (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Mon, 30 Oct 2000 20:20:55 -0500; Tom: Are there two relays in the AL-1200? I guess that was my real question. It acts like there is one relay (DPDT format) and I get my alarm when it is between connecting the input and output togeth; /archives//html/Amps/2000-10/msg00691.html (11,311 bytes)
9. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Thu, 14 Sep 2000 09:34:56 -0400; Marv: You're selling yourself short on your carrier resolution, I think! If the DDS is clocked from the 196.608 MHz, I get 0.04578 Hz per lsb (196.608e6 / (2^32)). But is this enough resolution for q; /archives//html/Amps/2000-09/msg00710.html (12,934 bytes)
10. [AMPS] Watt meters (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Wed, 27 Sep 2000 14:04:22 -0400; Jim: At 12:45pm EDT today, AES had at least five VFD-HF units in stock between Milwaukee and Vegas. Sometimes you have to actually ask them to check corporate-wide stock, and according to the compute; /archives//html/Amps/2000-09/msg01114.html (8,937 bytes)
11. [AMPS] Question About Correct Phase for 240V Transformer Primary Windings ??? (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Fri, 18 Aug 2000 12:45:21 -0400; Phil et al: Wouldn't this method work ok if he did it with the primaries in series (vs. parallel)? If they're out of phase, no voltage would appear, nor would there be any damage. If in phase, you'd; /archives//html/Amps/2000-08/msg00347.html (12,756 bytes)
12. [AMPS] Wire size (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Thu, 3 Feb 2000 08:33:08 -0500; Vic: To do this empirically, you can find tables of DC resistance of wire @75 degrees C per 1000 feet in the National Electrical Code (Chapter 9, Table 8 1990 NEC for example). Here are some numbers; /archives//html/Amps/2000-02/msg00028.html (9,840 bytes)
13. [AMPS] PEP - One of the horses is compelled to speak... (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Thu, 13 Jan 2000 09:35:26 -0500; Hi Guys: While watching the PEP discussion, I had to add some input. How RF Applications, Inc. measures the power you see displayed on the VFD (and all our other meters of this type): We use a direct; /archives//html/Amps/2000-01/msg00252.html (10,794 bytes)
14. [AMPS] "Pulser" speed and Tune Up (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Mon, 1 Nov 1999 20:52:53 -0500; Larry: It's software that manages peak detection/holding (well, firmware, actually)! No active electronics directly involved in that part of its function. You'll enjoy the meter - lots of folks do. 7; /archives//html/Amps/1999-11/msg00063.html (8,236 bytes)
15. [AMPS] PC Boards (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Fri, 16 Jul 1999 07:30:04 -0400; Jeff: Check out www.expresspcb.com This is a FANTASTIC source for getting relatively simple PC boards. I use it all the time. They have a free WIN95 layout package that is really easy to use. There i; /archives//html/Amps/1999-07/msg00320.html (8,247 bytes)
16. [AMPS] RF Applications Wattmeters (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Thu, 24 Jun 1999 16:09:31 -0400; Hello everyone: I saw the discussion about RF power meters and thought I would offer some information in answer to a couple of questions I saw about how the RF Applications line of wattmeters work. T; /archives//html/Amps/1999-06/msg00664.html (9,576 bytes)
17. [AMPS] RF Applications Wattmeters (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Thu, 24 Jun 1999 18:27:37 -0400; Tom: Since the peak detector holds that value for some number of seconds, users feel very uncomfortable seeing 250 watts coming out of their barefoot IC-xxx or whatever, even if that high power displ; /archives//html/Amps/1999-06/msg00673.html (8,379 bytes)
18. [AMPS] RF Applications Wattmeters (score: 1): Author: bknox@rfapps.com (Bruce R. Knox); Date: Thu, 24 Jun 1999 18:30:47 -0400; Hi: Since these devices are an operating aid (not a lab instrument), we decided this was the right way to go. Hey, it's only software! It can be removed for someone who wants to see it! 73 Bruce R. K; /archives//html/Amps/1999-06/msg00674.html (8,411 bytes)

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