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1. Topband: 4 square receiving array (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Wed, 31 Jan 2007 07:05:33 -0800
I realized this morning after coffee I made an error in my quick Spice model of the 16:1 transformer. The phase shifts due to magnetizing inductance are indeed smaller using a 10X factor than I quote
/archives//html/Topband/2007-01/msg00484.html (7,621 bytes)

2. Topband: DX0 on 160 (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 8 Feb 2007 09:52:21 -0800
I worked the DX0 station at 1300 Zulu this a.m. on 1828 up 2. A35 also showed up this morning at the same time on 1820.3... Neither was really strong but Q5 at the time. Both peaked here with the sun
/archives//html/Topband/2007-02/msg00060.html (6,639 bytes)

3. Topband: w7iuv preamp. (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sat, 17 Feb 2007 10:37:54 -0800
Mike W4EF, well done on the analysis of the W7IUV preamp and very informative. I also calculated nearly the same numbers indicating a need for more heat sink or less current etc. Also do not forget t
/archives//html/Topband/2007-02/msg00184.html (6,965 bytes)

4. Topband: w7iuv preamp last comment (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sat, 17 Feb 2007 13:34:36 -0800
Wow. Larry thanks for all you have done with these amps. No one ever meant any of this to be personal, or to imply your amp does not work for amateurs as designed. As for the bottom line if your heat
/archives//html/Topband/2007-02/msg00186.html (8,400 bytes)

5. Topband: Active Receiving Whip antenna question (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Fri, 23 Feb 2007 10:32:32 -0800
As a substitute for the 2N5160 you might look at the specs on the MRF545. I have never tried this transistor so YMMV. RF parts has them for a little over $4 each. If my memory is correct the MRF544 i
/archives//html/Topband/2007-02/msg00262.html (7,460 bytes)

6. Topband: FK8CP on TB (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Fri, 23 Feb 2007 21:10:34 -0800
I worked the FK8CP station on 2-16-2007 at 1332 zulu. He seems to be showing up regularly as I heard him both before and after this time. Be prepared to send CW very slowly. I also found that he hear
/archives//html/Topband/2007-02/msg00269.html (6,878 bytes)

7. Topband: more strange signals (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 27 Feb 2007 10:19:20 -0800
The 160 band was as quiet this morning as I can ever recall in the Ja/Ua0 direction. I ran across a series of stations at 1818.15, 1814.5,1813.25, and 1811.6. These were not the usual fishing beacons
/archives//html/Topband/2007-02/msg00287.html (6,830 bytes)

8. Topband: Small gauge wire for radials (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 5 Apr 2007 17:12:16 -0700
I have been using small guage wire for radials for many years with excellent results in the Pacific Northwest. My first 80 meter 4 square had several miles of number 21 motor rewinding insulated (pol
/archives//html/Topband/2007-04/msg00039.html (8,786 bytes)

9. Topband: End of the Season (Sigh!) (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 24 Apr 2007 08:46:19 -0700
Same here in central Oregon Guys. I took the last of my RX antennas down yesterday so we can plant potatoes to help feed the rest of the world. As I was removing the 8 element RX phased array I was t
/archives//html/Topband/2007-04/msg00113.html (7,097 bytes)

10. Topband: RG-6 Connectors (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Wed, 23 May 2007 08:35:58 -0700
I use F connectors exclusively for RG-6 on my RX arrays here. I use the outdoor type that takes the compression tool for installation. One array uses 22 of these connectors and has been put up and ta
/archives//html/Topband/2007-05/msg00071.html (6,764 bytes)

11. Topband: solder (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 31 May 2007 19:54:08 -0700
Roger: I believe you should narrow your look at the soldered radial option answers to others in your local area before ruling it out. I have weather and ground exposed 60/40 solder connections to cir
/archives//html/Topband/2007-06/msg00000.html (6,767 bytes)

12. Topband: New 8 element RX antenna (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Mon, 30 Jul 2007 20:52:23 -0700
After numerous requests for information on my 8 element active receiving antenna for top-band I have finally got it posted it to my website. Boy documenting this stuff sure takes a lot of time. Go to
/archives//html/Topband/2007-07/msg00041.html (6,648 bytes)

13. Topband: RX 4 square (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 21 Aug 2007 20:53:43 -0700
Good Evening Len and all. I recognize the statements you refer to as being from my recent 8 element antenna article posted to my website. First let me say that I cannot speak to the Dx Engineering RX
/archives//html/Topband/2007-08/msg00079.html (7,777 bytes)

14. Topband: RX 4 square (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Wed, 22 Aug 2007 09:17:32 -0700
At W7LR we are working on a 5 element rectangular array that "fires" in 6 different directions and not a 4 square. This antenna hopefully will provide Bob a maximum RDF for the environmental conditio
/archives//html/Topband/2007-08/msg00088.html (7,295 bytes)

15. Topband: RX 4 square (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 23 Aug 2007 14:02:39 -0700
Greg writes: My array uses a FET source follower on each element, for the exact reasons that Tom cites. The series capacitance of a 3m element on 160m is around 20pF, a reactance of 4 kohm. It's much
/archives//html/Topband/2007-08/msg00105.html (9,317 bytes)

16. Topband: Rx 4square (score: 1)
Author: "LEE STRAHAN" <k7tjr@msn.com>
Date: Sun, 02 Sep 2007 13:58:58 -0700
Roger said: I'm not an engineer and am having a hard time understanding this. It's my understanding that, if a cable is terminated in it's characteristic impedance, the phase shift will be equal to t
/archives//html/Topband/2007-09/msg00007.html (10,080 bytes)

17. Topband: Oregon High Desert report (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Fri, 12 Oct 2007 12:31:03 -0700
I fired up the receiver just before 1000Zulu this a.m. (3 a.m.) local. Specifically I was looking for the H40 that never showed but was instead treated to a rather pronounced version of the early mor
/archives//html/Topband/2007-10/msg00044.html (8,323 bytes)

18. Topband: Oregon High Desert report (score: 1)
Author: "LEE STRAHAN" <k7tjr@msn.com>
Date: Sat, 13 Oct 2007 09:13:33 -0700
Thanks Bill for the low horizontal suggestion. As it turns out I was thinking something more with a considerably higher RDF. I realized after I had sent the first message that I had said I was lookin
/archives//html/Topband/2007-10/msg00048.html (8,125 bytes)

19. Topband: ADSL line "mute" when TX on 160 (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Mon, 22 Oct 2007 15:54:02 -0700
My DSL line did exactly the same muting while transmitting on 160 over 300 watts. As it turned out the problem was cured by the phone company. My audio phone line had always been a little scratchy an
/archives//html/Topband/2007-10/msg00128.html (8,003 bytes)

20. Topband: NCC and phased Active verticals follow up (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Wed, 24 Oct 2007 11:29:22 -0700
Tod wrote: I inserted the jumper designed to enhance 160 meter operation and measured the BC band signals and also the 1850 spur at the station end of the active vertical. Here is what I found: 590 k
/archives//html/Topband/2007-10/msg00153.html (8,791 bytes)

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