Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Sun, 08 Aug 2010 21:21:54 -0700
That's why when I write something, I INCLUDE the science that causes me to say what I say. That's especially necessary when I'm teaching things that go against long held beliefs (popular mythology).
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Mon, 09 Aug 2010 11:46:40 -0700
RF on the shield IS common mode current. Common mode current is the result of antenna imbalance, mostly with respect to ground and grounded conductors. For example, a tree, wiring in a house, the gro
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Mon, 09 Aug 2010 13:24:47 -0700
Please learn to leave off the word balun. It is a choke. Period. :) 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Mon, 09 Aug 2010 13:25:25 -0700
Right. Jim _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Tue, 10 Aug 2010 00:16:53 -0700
Most RFI in today's world is NOT to TV receivers, but to AUDIO equipment (including computers), and it is mostly the result of pin 1 problems. The rest is lousy (or non-existent) shielding. But RF of
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 11 Aug 2010 14:14:03 -0700
Yes, they work very well for ham radio, and are a real bargain besides. It's also easy to find them for about $45. 73, Jim K9YC _______________________________________________ TenTec mailing list Ten
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 11 Aug 2010 17:02:34 -0700
Almost everything in this email is wrong. See my tutorial on headphones in http://audiosystemsgroup.com/RFI-Ham.pdf It's in an Appendix. Most modern radios are designed to drive almost anything from
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 11 Aug 2010 18:47:23 -0700
Yes, audio cables are crummy, but that's rarely the cause of RFI. It's the PIN 1 PROBLEM in the equipment, and virtually ALL consumer equipment, computer equipment, and ham equipment is built with pi
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 11 Aug 2010 22:37:25 -0700
Heil is not an audio expert, he is a MARKETING expert. BIG difference. 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.c
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Thu, 12 Aug 2010 08:30:53 -0700
Switchcraft makes at least three grades of XL connectors. The cheapies are poor, the others are very good. The other good connector mfr is Neutrik. They're the new kid on the block (about 30 years ag
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Thu, 12 Aug 2010 08:38:30 -0700
research. Like you, I found my BSEE program to be a 16 hour a day process for five years (coop at the Univ of Cincy, so it took an extra year). And, like you, I've been studying SOMETHING nearly ever
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Thu, 12 Aug 2010 14:03:59 -0700
Yes, it is my opinion. So is Heil's self-proclaimed expert status. I know of no one in the world of pro audio who shares that opinion. As to marketing -- his products are cheaply made and overpriced,
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Thu, 12 Aug 2010 17:39:49 -0700
If you choose to believe that it's certainly your right. The capsules in those expensive Heil mic packages cost well under a buck. The amplified headphones have RFI problems. I've experienced that fi
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Thu, 02 Sep 2010 20:36:02 -0700
When I was a teenager starting out, someone GAVE me a 40M Command Set and a power supply for it. I had already saved to buy a used S38D. That got me on the air. I saved from summer work to by a secon
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Fri, 03 Sep 2010 00:18:08 -0700
Naw, she and I together simply did what Dave, N6RZ, would have done. Jim _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/
No, you are not wrong. 73, Jim K9YC (a serious contester) _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
Lots of FT2000 and FT1000 series radios have been sold or are for sale by contesters. Their owners replaced them with K3s. The primary reason is that the K3 is almost 20dB better in terms of front en
Proximity to other contesters is a very big reason for using the best possible rigs on both ends. I have contesting neighbors 0.3 miles from me, two at three miles, four more in the 5-15 mile range.
Such cables can be easily built from parts readily available at places like Newark, Allied, and Digikey. 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contes
That's right -- it depends on the vintage of the Titan 425. All use two bulbs, but some versions use two 12V-14V bulbs in series and others use 28V bulbs in parallel. You'll need to open the amp up a