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Total 303 documents matching your query.

141. Re: [TowerTalk] [Bulk] Change in Frequency As Antenna Height Rises (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Tue, 31 May 2016 07:35:17 -0400
Thanks Grant, I worked with Greg, '8WWV, for quite a bit of the modeling - he would run my models using NEC4 ... and although he'd get a slight shift in frequency his results were similar to mine tha
/archives//html/Towertalk/2016-05/msg00612.html (12,404 bytes)

142. Re: [TowerTalk] Change in Frequency As Antenna Height Rises (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Tue, 31 May 2016 07:49:50 -0400
now this is where I get a bit frustrated ... MY experience in modeling height change is that it doesn't reliably predict it! I am using NEC2 (although models checked have been re-checked courtesy of
/archives//html/Towertalk/2016-05/msg00613.html (14,561 bytes)

143. Re: [TowerTalk] Change in Frequency As Antenna Height Rises (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Tue, 31 May 2016 07:57:35 -0400
AH HA! Ok - so there is a difference between a dipole and a yagi. Great to know! And if indeed that new model re a yagi shows similar results that would be quite encouraging. My apologies if I missed
/archives//html/Towertalk/2016-05/msg00614.html (10,999 bytes)

144. [TowerTalk] Modeling question - for the experts! (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Thu, 2 Jun 2016 08:38:35 -0400
Ok... so here is my situation. I will have 6/6 on 15 with the top at 90. I will have the 40M4LLDD at 124 so just 34 above it (a good distance for stacking on 15!) I had asked for others with this ant
/archives//html/Towertalk/2016-06/msg00041.html (11,274 bytes)

145. Re: [TowerTalk] [Bulk] Modeling question - for the experts! (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Thu, 2 Jun 2016 11:58:42 -0400
Hi Grant - my numbers were as found on a recently calibrated (by Larry) LP100 as well as the rig as well as the SPE 2K. All agree quite closely. I've not seen any irregularities here using the SARK s
/archives//html/Towertalk/2016-06/msg00047.html (15,552 bytes)

146. Re: [TowerTalk] Modeling question - for the experts! (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Thu, 2 Jun 2016 12:34:36 -0400
If some are seeing an SWR much closer to 1:1 ... then there WILL be interaction guaranteed. Is it hurting anything? Was that rhetorical? I ask because although I've done quite well in range testing t
/archives//html/Towertalk/2016-06/msg00050.html (15,154 bytes)

147. Re: [TowerTalk] Modeling question - for the experts! (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Thu, 2 Jun 2016 13:32:52 -0400
Sorry Jim - you've misunderstood where I am going .... I'm using SWR as a 'worst offender" indicator. I am not at all worried about SWR, or at least not in it as a single indicator - but in all the m
/archives//html/Towertalk/2016-06/msg00058.html (11,566 bytes)

148. [TowerTalk] coupling EHS to EHS or EHS to philly (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Thu, 2 Jun 2016 15:48:31 -0400
I had planned on using 1/2 thimbles to couple 5/16 EHS to 5/16 EHS (pieces I have from a purchase) ... as well as at their ends of course ... and the same for coupling from the 11200 philly to the 5/
/archives//html/Towertalk/2016-06/msg00062.html (7,364 bytes)

149. Re: [TowerTalk] Modeling question - for the experts! (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Thu, 2 Jun 2016 16:28:17 -0400
the Optibeam is designed NOT to be resonant... funny how that works. One would think ALL antennas, if there is that likelihood, would be designed as such or at least an optional kit. Especially since
/archives//html/Towertalk/2016-06/msg00066.html (10,471 bytes)

150. Re: [TowerTalk] Modeling question - for the experts! (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Thu, 2 Jun 2016 20:07:20 -0400
Thanks Jim.... re the factors you mention: the antenna is 34' away, about 2/3 wave at 15 meters so quite close enough and an oft used stacking distance, it is in the same plane as the 15 ... and re t
/archives//html/Towertalk/2016-06/msg00072.html (14,110 bytes)

151. Re: [TowerTalk] Modeling question - for the experts! (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Fri, 3 Jun 2016 09:05:57 -0400
Jim, But as noted before I can't get a model to work! Therein lies the issue. If I could get a model to do something close to reality I'd feel considerably more comfortable - I've heard several say t
/archives//html/Towertalk/2016-06/msg00083.html (12,049 bytes)

152. [TowerTalk] Exploring another option re interaction 40/15 on same tower (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Fri, 3 Jun 2016 11:15:22 -0400
Ok ... so the plan is to have 6/6 on 15M at 90/45 and Im worried about (the unknown) interaction from a 4 el 40 mounted 34 above the top 15. One option I have is to simply rotate the 40M 90 degrees a
/archives//html/Towertalk/2016-06/msg00085.html (8,013 bytes)

153. Re: [TowerTalk] Exploring another option re interaction 40/15 on (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Sat, 4 Jun 2016 12:09:46 -0400
Thanks Jim, Yes - a rotating tower so all antennas are fixed to the tower yes - the Optibeam and the F12 as well as the JK are all designed to play nice with a 15... M2 not so much. The 80 is already
/archives//html/Towertalk/2016-06/msg00089.html (12,189 bytes)

154. [TowerTalk] K0XG and grounding (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Sun, 5 Jun 2016 19:55:34 -0400
I have a used K0XG rotating tower system... so I dont have info on how install this thing.... Im mechanically inclined but am curious how one grounds the tower with one of these!? I had a RTS system
/archives//html/Towertalk/2016-06/msg00109.html (7,372 bytes)

155. [TowerTalk] Results: 15 yagi mounted in the presence of an M2 40M4LLDD (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Wed, 8 Jun 2016 16:47:35 -0400
An FYI for those interested. Note this is ONLY about an M2 40M4LLDD. There are other 40 antennas that are/were intentionally designed not to have an interaction issue with 15 meters. JK, Optibeam, (s
/archives//html/Towertalk/2016-06/msg00133.html (12,944 bytes)

156. [TowerTalk] in need of a copy of manual for F12 Sigma 180 Magnum dipole (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Fri, 10 Jun 2016 10:14:26 -0400
this is the one that is about 76 long with 26 t bars... mine is somewhere in all these boxes after so many moves ... emailed pdf would be more than fine if someone has one and can scan and email it.
/archives//html/Towertalk/2016-06/msg00137.html (6,914 bytes)

157. [TowerTalk] Reusing guy lines ... (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Sat, 11 Jun 2016 12:57:05 -0400
I bought 120 of R55 used ... it came with 2 sets of guys both 5/16 ... all preassembled using 1/2 thimbles and big grips at one end and 1/2 thimbles and clamps at the other ... Their individual lengt
/archives//html/Towertalk/2016-06/msg00144.html (8,091 bytes)

158. Re: [TowerTalk] Loosening Al tubing to Al Tubing (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Sun, 12 Jun 2016 08:29:51 -0400
I have a few sections from a used yagi purchase that are like this - a few of them I managed to get apart with lots of effort using a screw driver in an existing hole and lots of pulling ... the rest
/archives//html/Towertalk/2016-06/msg00150.html (8,913 bytes)

159. Re: [TowerTalk] Loosening Al tubing to Al Tubing (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Sun, 12 Jun 2016 13:06:52 -0400
generally I find its not only corrosion but metal bits from holes that weren't cleaned on the inside (how would one do that!?) ... THEY put the breaks on BIG time... the one I did manage to separate
/archives//html/Towertalk/2016-06/msg00153.html (10,818 bytes)

160. Re: [TowerTalk] Loosening Al tubing to Al Tubing (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Sun, 12 Jun 2016 18:19:39 -0400
THAT was the stuff - PB Blaster... let it sit for DAYS ... nothing - nada. Tried WD-40 just for SnG's, and yes I'm aware its water displacement but it also does work in some lubrication cases - works
/archives//html/Towertalk/2016-06/msg00158.html (12,306 bytes)


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