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121. [TowerTalk] A Question of GAIN (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 20 Oct 1998 09:00:29 -0400; Hi John, This is all explained in my most recent reply to Eric written yesterday. the single distortion paths Thanks for the input. It validates an effect I have long noticed on 160 and 80 meters, an; /archives//html/Towertalk/1998-10/msg00698.html (10,475 bytes)
122. [TowerTalk] BIG GUN SIGNAL (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 20 Oct 1998 08:43:42 -0400; Hi Joe, to high is You'd be surprised at how many complaints amplifier manufacturers get about not being able to run 1500 watts plus out on 30 meters. I learned my lesson on this years ago, when one; /archives//html/Towertalk/1998-10/msg00699.html (8,428 bytes)
123. [TowerTalk] Re: (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 20 Oct 1998 09:42:48 -0400; Hi Guy, is can I'll save space and not reprint most of your well thought out post. The theory presented assumes: 1.) There is no phase shift. 2.) Fading is by some unknown phenomena that simply "shut; /archives//html/Towertalk/1998-10/msg00700.html (10,355 bytes)
124. [TowerTalk] Re: ATR30 (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 20 Oct 1998 10:17:36 -0400; high Hi Stan, I can't figure out which e-mail address in the heading is yours! I use a few of them here, and have been using one since last fall. You should get a manual from Ameritron and look at i; /archives//html/Towertalk/1998-10/msg00701.html (7,568 bytes)
125. [TowerTalk] Re: TopBand: 75 meter vert. fed with open wire (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 20 Oct 1998 09:52:01 -0400; Hi Lane, radials wire The feedline will be part of the antenna and radiate in this setup Lane. Feeding an unbalanced antenna with a balanced line is a poor method. You can only cure the problem with; /archives//html/Towertalk/1998-10/msg00703.html (8,099 bytes)
126. [n7cl@toontown.mmsi.com: Re: [TowerTalk] A Question of GAIN] (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 20 Oct 1998 12:36:50 -0400; Hi Tom, In an earlier post, I specifically ruled out the case of direct wave propagation where a linear polarity radiator can be effectively used with a circular polarized radiator at the other end t; /archives//html/Towertalk/1998-10/msg00720.html (8,792 bytes)
127. [TowerTalk] A Question of GAIN (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 20 Oct 1998 11:46:44 -0400; Hi John, We'll have to disagree on that one John. If you have the time and inclination, we'll talk about it. But I'm in some pretty good company on this one. directors Whereas the quad has that Ditto; /archives//html/Towertalk/1998-10/msg00721.html (10,148 bytes)
128. [TowerTalk] A Question of GAIN (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Wed, 21 Oct 1998 08:47:58 -0400; Hi Guy, Tom me? I didn't mean to imply null filling or movement is not important. I said (a long time ago) null filling was the advantage of a stack, not gain improvement. My point is improved direct; /archives//html/Towertalk/1998-10/msg00763.html (9,581 bytes)
129. [TowerTalk] A Question of GAIN (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Wed, 21 Oct 1998 08:48:05 -0400; Hi Guy, Tom me? I didn't mean to imply null filling or movement is not important. I said (a long time ago) null filling was the advantage of a stack, not gain improvement. My point is improved direct; /archives//html/Towertalk/1998-10/msg00764.html (9,136 bytes)
130. [TowerTalk] re: rhombics (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Wed, 21 Oct 1998 09:18:43 -0400; Hi Rick, What you say below is absolutely true, but it might get you strung up and lynched! This is a lot like insulting one's dear old favorite grandfather. It's just like the guy near Youngstown an; /archives//html/Towertalk/1998-10/msg00767.html (9,965 bytes)
131. [TowerTalk] Re: TopBand: 75 meter vert. fed with open wire (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Wed, 21 Oct 1998 09:30:15 -0400; The best kind of balun. It has no ground reference, and so acts as a totally ground independent source. The only magnetic field in the core is due to any remaining unwanted common mode currents, and; /archives//html/Towertalk/1998-10/msg00768.html (7,474 bytes)
132. [TowerTalk] Best wire type antenna for 75m/80m DX coverage (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Wed, 21 Oct 1998 12:36:19 -0400; cover I use the same thing on the elements of my four square, and on 80 meter dipole antennas. I space a pair of #16 wires twelve feet on the open end on 160, and on eighty I space the ends 3 feet w; /archives//html/Towertalk/1998-10/msg00802.html (9,159 bytes)
133. [TowerTalk] Open Wire Line (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Thu, 22 Oct 1998 13:12:49 -0400; This might be of general interest to people with long feedlines. I'm installing a very tall tower for an expanded 160 system 1400 feet back from my shack. I needed a low-loss feeder to get RF back th; /archives//html/Towertalk/1998-10/msg00819.html (8,766 bytes)
134. [TowerTalk] Open Wire Line (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Fri, 23 Oct 1998 08:56:52 -0400; Hi Dave, Don't know. There are too many types. I measured some ribbon-type "ladder" line and it was OK but no where near like the real stuff. The thing I don't like is how much it changes when it get; /archives//html/Towertalk/1998-10/msg00841.html (10,220 bytes)
135. [TowerTalk] Open Wire Line (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Fri, 23 Oct 1998 09:04:59 -0400; Home made from UV resistant Lexan per 4X4NJ's suggestion. If the spreaders lasts through a whole year of GA sunshine without deterioration of any kind, I'm thinking of having a few thousand stamped; /archives//html/Towertalk/1998-10/msg00842.html (8,357 bytes)
136. [TowerTalk] open wire feeders (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Fri, 23 Oct 1998 09:52:12 -0400; Hi Nate, No, it has MORE loss Nate. Strandings using parallel strands (even with Litz wire) have more loss resistance at RF per unit length for a given wire size. Braiding has several times the loss; /archives//html/Towertalk/1998-10/msg00846.html (7,765 bytes)
137. [TowerTalk] Open Wire Line (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Sun, 25 Oct 1998 09:58:26 -0500; Hi Ron, I agree! Another thing people neglect is even a poor dielectric has negligible effect is the electric field is mostly outside the dielectric. For example, I use only 50 or so Lexan spreaders; /archives//html/Towertalk/1998-10/msg00869.html (8,424 bytes)
138. [TowerTalk] MFJ 259 accuracy?? (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Mon, 26 Oct 1998 14:21:18 -0500; Hi Will, You probably experienced the effects of RF getting into the 259. MFJ is releasing a "transparent filter" I designed that will cure virtually all of these problems. Tests at some "unusable lo; /archives//html/Towertalk/1998-10/msg00889.html (8,959 bytes)
139. [TowerTalk] Interpreting SWR on used coax (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 27 Oct 1998 08:02:54 -0500; That formula "works" within a limited range of loss, but keep in mind it is just an approximation. For example, look at a line with infinite loss. Z=50*.17= 8.5 dB loss. It also depends on Z being ac; /archives//html/Towertalk/1998-10/msg00907.html (7,651 bytes)
140. [TowerTalk] Re: MFJ 259 (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Wed, 28 Oct 1998 07:26:39 -0500; BCI tell It isn't a modification, it's a separate external notch and "transparent" band-pass filter all in one box (patent pending). Since it is a three day project to design and a three day project; /archives//html/Towertalk/1998-10/msg00928.html (7,557 bytes)

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