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References: [ +from:KeepWalking188@ac0c.com: 195 ]

Total 195 documents matching your query.

121. Re: [TowerTalk] JK 402 versus CC XM-240 (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 27 Feb 2019 09:48:38 +0800
Picking the "best" 40m beam is very hard on 40m and requires a compromise unless you have a big tower, a big rotor, moderate wind/ice exposure, height limitations and CW/SSB only vs. wideband CW+SSB.
/archives//html/Towertalk/2019-02/msg00153.html (9,693 bytes)

122. Re: [TowerTalk] JK 402 versus CC XM-240 (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 27 Feb 2019 11:54:24 +0800
Jim, The 4sq is a great antenna but the yagi beats the 4SQ almost all the time, and often by some to a lot of s-units when it comes specifically to raw signal strength.  In some cases the difference
/archives//html/Towertalk/2019-02/msg00155.html (11,952 bytes)

123. Re: [TowerTalk] JK 402 versus CC XM-240 (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 27 Feb 2019 12:19:20 +0800
Tim makes a good point.  The reason a 4SQ is a great DX antenna is that with a quality ground, the power at the lower angles is still significant where a short tower mounted beam drops off fast.  The
/archives//html/Towertalk/2019-02/msg00158.html (15,000 bytes)

124. Re: [TowerTalk] JK 402 versus CC XM-240 (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 27 Feb 2019 16:24:20 +0800
Jim I don't think that Tim is saying the 4sq is 6 dB better than his beams.  I read that as a 4sq is around 6dB of gain on a model.  Maybe I'm reading that wrong.  Pretty sure if it was 6 dB better t
/archives//html/Towertalk/2019-02/msg00163.html (11,307 bytes)

125. Re: [TowerTalk] Repairing/replacing a damaged feedline Part II (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 27 Mar 2019 23:42:23 -0500
I've had type 31 ferrites on a bunch of antennas over the years and never had a crack that was not caused by physical damage (meaning I dropped them or hit them somehow).  So if you have cracked ferr
/archives//html/Towertalk/2019-03/msg00328.html (13,804 bytes)

126. Re: [TowerTalk] Antenna Analyzers (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Thu, 6 Jun 2019 18:57:05 -0500
I have a rig expert AA55 and it's great.  Long battery life, has end-of-coax-plane calibration and is rugged.  The MFJ259 is fine but it's way too sensitive to BC interference.  And the VNAs I have a
/archives//html/Towertalk/2019-06/msg00040.html (12,121 bytes)

127. [TowerTalk] Mounting 1.25 stinger in 3" tubing? (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sat, 8 Jun 2019 11:08:08 -0500
I'm rebuilding my 40m 4-sq verts and have some 15' lengths of 3" OD/ 2.75 ID tubing to use on the base end.  And for the "stinger" end, I have some tapered elements off an old yagi that are 1.25" OD
/archives//html/Towertalk/2019-06/msg00054.html (7,652 bytes)

128. Re: [TowerTalk] Mounting 1.25 stinger in 3" tubing? (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sat, 8 Jun 2019 15:18:40 -0500
I should have been clear.  This is a question on the MECHANICAL side - some sort of physical transition between sizes.  Not a modeling issue.  SOrry for the confusion! 73/jeff/ac0c alpha-charlie-zero
/archives//html/Towertalk/2019-06/msg00057.html (9,813 bytes)

129. Re: [TowerTalk] antenna modeling software newbie (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sat, 13 Jul 2019 21:19:50 -0500
Look into MMANA-GAL.  It's very popular in the EU where EZNEC is the common one in the US.  MMANA has a very easy to use interface and a built-in optimizer.  If you don't want to get into the weeds l
/archives//html/Towertalk/2019-07/msg00150.html (10,968 bytes)

130. Re: [TowerTalk] tower replacement wisdom (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Thu, 18 Jul 2019 19:26:27 -0500
Having no idea of the location, don't be surprised at all if having the commercial users on the tower turns your permit process into a major project. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.
/archives//html/Towertalk/2019-07/msg00229.html (13,156 bytes)

131. Re: [TowerTalk] Modeling vs Experimenting Crowds (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sat, 14 Sep 2019 00:40:01 -0500
I'm with Grant on that.  The real value of modeling is not that it will ensure you build a good antenna, but rather it will help you avoid building ones that have no chance of working the way you wan
/archives//html/Towertalk/2019-09/msg00369.html (12,127 bytes)

132. [TowerTalk] GDT sizing for feedlines (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Tue, 8 Oct 2019 22:17:50 -0500
I have a number of feedlines that I want to apply GDT out in the field too.  This is to buy a bit of extra insurance on lightning events. But I am wondering how to match up the GDT selection criteria
/archives//html/Towertalk/2019-10/msg00069.html (7,185 bytes)

133. Re: [TowerTalk] GDT sizing for feedlines (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 9 Oct 2019 01:13:22 -0500
Steve, PERFECT!!!  Thanks. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com 73, de Steve Ve6Wz Sent from my iPad On Oct 8, 2019, at 9:18 PM, Jeff Blaine <KeepWalking188@ac0c.com <mailto:KeepWalki
/archives//html/Towertalk/2019-10/msg00072.html (8,885 bytes)

134. Re: [TowerTalk] Illuminating antennas on towers (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Mon, 21 Oct 2019 12:05:28 -0500
To check on my stuff, I use a Stanley LED spot light hand held. I think it's a 10W bulb and is stunningly bright.  Towers are 250-400' behind the house.  Definitely need my glasses but it's easy to s
/archives//html/Towertalk/2019-10/msg00172.html (9,375 bytes)

135. Re: [TowerTalk] Ferrites 31 vs. 77 material (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sat, 9 Nov 2019 13:36:12 +0900
A single turn through a given core has much less Z than the multi-turn variety.  And as frequency goes down for a given ferrite (of any type), the Z is also lower. So it's not that they only work at
/archives//html/Towertalk/2019-11/msg00065.html (11,564 bytes)

136. Re: [TowerTalk] Fwd: Old Hardline (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Thu, 14 Nov 2019 12:35:12 +0800
I've heard from some guys that used hardline is a mistake in the making.  Well, that may be true in some cases but for most, it's definitely worth checking out.  Especially if it's 50 ohm stuff. Even
/archives//html/Towertalk/2019-11/msg00122.html (11,426 bytes)

137. Re: [TowerTalk] Fwd: Old Hardline (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Thu, 14 Nov 2019 17:29:33 +0800
Jim, I was exceptionally fortunate to have managed to buy a but, find some and be given a lot of hardline.  Enough to do the entire installation save for a low 80m dipole. You may find the backstory
/archives//html/Towertalk/2019-11/msg00124.html (9,132 bytes)

138. Re: [TowerTalk] 45G and guys (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Mon, 16 Dec 2019 18:14:06 -0600
On the question of "Will the EHS cause interactions" - the answer is YES. That is true regardless of length, although the magnitude of the interaction is going to be a factor of many things including
/archives//html/Towertalk/2019-12/msg00101.html (9,716 bytes)

139. Re: [TowerTalk] JK Mid Tri opinions (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sun, 22 Dec 2019 21:28:24 -0600
Are you talking about the 40m performance?  A local here K3PA has a mid-tri and has much better F/B on the higher bands but the 40m is as you say, in the 10-15 range - but that's to be expected from
/archives//html/Towertalk/2019-12/msg00134.html (11,335 bytes)

140. [TowerTalk] lightning surge suppressor for ethernet run to outbuilding (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 1 Jan 2020 12:53:26 -0600
Wanted to see if there were some recommendations on a solid surge suppressor I could hang on each end of a 300' run of ethernet that goes between the shack and the outbuilding? There are a number of
/archives//html/Towertalk/2020-01/msg00008.html (7,199 bytes)


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