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References: [ +from:dj7ww@t-online.de: 172 ]

Total 172 documents matching your query.

121. Re: [TowerTalk] Shunt Feeding a Vertical (score: 1)
Author: <dj7ww@t-online.de>
Date: Mon, 9 Sep 2019 09:06:38 +0200
Yes, there are many radials on the ground, a total of about 6km. I found the position of the feed point is depending on my top loads. After replacing my 5L 10m against a 7L OWA and the shorty-forty a
/archives//html/Towertalk/2019-09/msg00241.html (9,730 bytes)

122. Re: [TowerTalk] Best Supplier of LDF4-50A 1/2" Heliax (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 19 Sep 2019 01:26:02 +0200
RFS LDF4-50 price is about 2.50 Euros the meter in Germany. 73 Peter Hello All Looking for the best price I can get for 300 feet of LDF4-50A 1/2" heliax. Best 73's Paul - W2NMI ______________________
/archives//html/Towertalk/2019-09/msg00413.html (8,315 bytes)

123. Re: [TowerTalk] Best Supplier of LDF4-50A 1/2" Heliax (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 19 Sep 2019 01:30:03 +0200
I forgout to change the designation. The RFS type is LCF12-50J. 73 Peter RFS LDF4-50 price is about 2.50 Euros the meter in Germany. 73 Peter Hello All Looking for the best price I can get for 300 fe
/archives//html/Towertalk/2019-09/msg00414.html (8,602 bytes)

124. Re: [TowerTalk] Best Supplier of LDF4-50A 1/2" Heliax (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 19 Sep 2019 09:06:28 +0200
It is not mentioned in the factory specification, but I use it direct buried for almost 40 years. To me it looks identical to Andrew LDF4-50 as I use both types of cable. RFS invented corrugated coax
/archives//html/Towertalk/2019-09/msg00417.html (10,526 bytes)

125. Re: [TowerTalk] 80M antenna wire size (score: 1)
Author: <dj7ww@t-online.de>
Date: Fri, 3 Jan 2020 09:07:45 +0100
If the radiation resistance is only 20 ohms or less, that 0,05 ohms per meter might reduce the efficiency significantly. 73 Peter I'm using #18 solid Copperweld wire from Davis RF for my 160m Inverte
/archives//html/Towertalk/2020-01/msg00044.html (8,557 bytes)

126. Re: [TowerTalk] 40m 4el KLM - replacing linear loading with coils (score: 1)
Author: <dj7ww@t-online.de>
Date: Wed, 29 Apr 2020 17:46:40 +0200
Physical bending of the tubing is not necessary. By using mounting plates with isolating Stauff clamps at the needed angle as element holders straight elements can be used. 73 Peter The forward gain
/archives//html/Towertalk/2020-04/msg00235.html (12,032 bytes)

127. Re: [TowerTalk] 40m 4el KLM - replacing linear loading with coils (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 30 Apr 2020 10:59:50 +0200
There is no reason a yagi match would loose 0.5dB. By lengthening the boom for OWA the gain can be kept the same as with the conventional yagi. 73 Peter How much loss is there in a conventional Yagi
/archives//html/Towertalk/2020-04/msg00241.html (11,429 bytes)

128. Re: [TowerTalk] 40m 4el KLM - replacing linear loading with coils (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 30 Apr 2020 18:49:03 +0200
Indeed, I built a 7 element 10m and a 6 element 15m some years ago and converted 2 of my KLM yagis to OWA last year and 4 other KLM to follow during the summer. Also converted HyGain yagis to OWA suc
/archives//html/Towertalk/2020-04/msg00245.html (12,631 bytes)

129. Re: [TowerTalk] 1dB more RF Power? (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 5 May 2020 17:57:14 +0200
You will almost being not readable with your top end extended to 3.8-3.9 kHz or higher on a standard filter which we use over here, espeally when you raise signals above 2.8kHz by EQ. Band width abov
/archives//html/Towertalk/2020-05/msg00016.html (11,904 bytes)

130. Re: [TowerTalk] NVIS (not exactly towers, but HF) (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 9 Jun 2020 18:29:20 +0200
With a straight dipole at 0.25 lambda base would have heard you much stronger. The main lobe of that dipole is also straight up at 90° but with much more gain. NVIS is good when the military wants ju
/archives//html/Towertalk/2020-06/msg00040.html (12,887 bytes)

131. Re: [TowerTalk] NVIS (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 11 Jun 2020 18:55:04 +0200
I had very good results in our local (within Germany) sprint contest on 40m with the Jamaica antenna where only high angle radition is necessary and supressed interference from Europe. http://on5au.b
/archives//html/Towertalk/2020-06/msg00071.html (9,982 bytes)

132. Re: [TowerTalk] Inverted Vees (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 16 Jun 2020 14:34:12 +0200
No, my best 160m receiving antenna is my vertical. Very weak signals are not audible on my receiving antenna. My receiving beverage antennas 120-160m long are only good for directivity like suppressi
/archives//html/Towertalk/2020-06/msg00115.html (9,978 bytes)

133. Re: [TowerTalk] Common Mode RF choke on a 50 MHz yagi (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 2 Jul 2020 03:00:03 +0200
95% velocity factor will probably be allright, a thin wire is typically 3% shorter for quarter wave resonance then free space calculates. 73 Peter required, I meant 59 inches for 50.000 MHz. Quarter
/archives//html/Towertalk/2020-07/msg00014.html (9,067 bytes)

134. Re: [TowerTalk] Common Mode RF choke on a 50 MHz yagi (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 2 Jul 2020 18:08:38 +0200
Hi Rick, The quarter wave symmetrising stub for common mode supression in this case is not a transmission line, it can be seen as a pvc insulated wire when coax is used. It does not need to be a coax
/archives//html/Towertalk/2020-07/msg00021.html (11,327 bytes)

135. Re: [TowerTalk] 20m monoband Yagi height (score: 1)
Author: <dj7ww@t-online.de>
Date: Wed, 15 Jul 2020 15:37:29 +0200
Indeed, HFTA is extremely helpful when optimizing antenna heights. I have a sloping foreground advantage when working USA and use 5/5/5 on 20m. Here is the HFTA diagram: https://pbase.com/df3kv/image
/archives//html/Towertalk/2020-07/msg00180.html (10,684 bytes)

136. Re: [TowerTalk] Can 1/4" or 3/8" Andrew SUPERFLEX be used for a Rotor loop? (score: 1)
Author: <dj7ww@t-online.de>
Date: Thu, 16 Jul 2020 15:29:47 +0200
I am turning LCF12-50 solid core cables for more then 40 years and never had one broken. RG218 with its solid 4.95mm inner conductor is turned as well without any problem. I would not use thin cable
/archives//html/Towertalk/2020-07/msg00185.html (11,976 bytes)

137. Re: [TowerTalk] Balun for Force 12 6 Element 20 Meter Monobander (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 21 Jul 2020 09:10:30 +0200
I donīt think so, he is not even using feed through insulators. 73 Peter This guy make them best in class, I guess are same level or higher than DXE and Balun design. ________________________________
/archives//html/Towertalk/2020-07/msg00241.html (9,484 bytes)

138. Re: [TowerTalk] Balun for Force 12 6 Element 20 Meter (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 21 Jul 2020 20:23:37 +0200
Before WX0B switched to use feed through insulators I replaced two of his baluns on Optibeams at a friend. Baluns were made from RG393 wound through ferrite toroids. Around the stainless steel screws
/archives//html/Towertalk/2020-07/msg00256.html (10,069 bytes)

139. Re: [TowerTalk] Mast slippage (score: 1)
Author: <dj7ww@t-online.de>
Date: Wed, 29 Jul 2020 15:20:01 +0200
I have 4 Prosistel rotators in use and all masts slipped whatever I torqued the screws. So I decided to drill through the masts and used fitting bolts to fix that. I used an electrical hand drill wit
/archives//html/Towertalk/2020-07/msg00378.html (9,434 bytes)

140. Re: [TowerTalk] Tower accident (score: 1)
Author: <dj7ww@t-online.de>
Date: Sat, 29 Aug 2020 18:11:41 +0200
I find it very useful 73 Peter Your link is useless. mishaps climber occured risk. a level, page. _______________________________________________ _______________________________________________ Tower
/archives//html/Towertalk/2020-08/msg00193.html (12,641 bytes)


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