Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Force\s+12\s+EF\-240\s+SWR\s+shift\s*$/>

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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Force\s+12\s+EF\-240\s+SWR\s+shift\s*$/: 6 ]

Total 6 documents matching your query.

1. [TowerTalk] Force 12 EF-240 SWR shift (score: 1): Author: w5wz@w5wz.com; Date: Sun, 15 Sep 2019 15:32:48 -0500; The SWR minimum on my lowest Force 12 EF-240 has shifted from ~7.16 MHz down to about 6.7 MHz. However, the curve appears very similar to measurements taken and archived in 2015; it's just that it sh; /archives//html/Towertalk/2019-09/msg00392.html (8,019 bytes)
2. Re: [TowerTalk] Force 12 EF-240 SWR shift (score: 1): Author: Charles Morrison <junkcmp@gmail.com>; Date: Sun, 15 Sep 2019 18:40:02 -0400; Linear loading shorting bar disconnected ? Hairpin break? Check the continuity ofcoax to tower ground. Are both center pin of feed line and shield conductive to ground? N1RR _________________________; /archives//html/Towertalk/2019-09/msg00395.html (8,972 bytes)
3. Re: [TowerTalk] Force 12 EF-240 SWR shift (score: 1): Author: Wayne Kline <w3ea@hotmail.com>; Date: Sun, 15 Sep 2019 23:05:01 +0000; Looking at the weeps , The linear loading wire/element support wire have to be intact I think I would look at the 4 turn 3 coil that across the feedpoint. Wayne W3EA Sent from Mail<https://go.microso; /archives//html/Towertalk/2019-09/msg00396.html (9,294 bytes)
4. Re: [TowerTalk] Force 12 EF-240 SWR shift (score: 1): Author: john@kk9a.com; Date: Sun, 15 Sep 2019 20:34:06 -0500; A detached hairpin coil or a detached linear loading would raise the resonant frequency. John KK9A Linear loading shorting bar disconnected ? Hairpin break? N1RR The SWR minimum on my lowest Force 12; /archives//html/Towertalk/2019-09/msg00398.html (8,680 bytes)
5. Re: [TowerTalk] Force 12 EF-240 SWR shift (score: 1): Author: "Ed Sawyer" <sawyered@earthlink.net>; Date: Mon, 16 Sep 2019 12:58:26 -0400; To be clear, just because the SWR gets better lower in frequency (to a 50 Ohm input) doesn't mean something has lengthened. It just means that a frequency dependent impedance has shifted lower in fre; /archives//html/Towertalk/2019-09/msg00405.html (8,064 bytes)
6. Re: [TowerTalk] Force 12 EF-240 SWR shift (score: 1): Author: Richard Thorne <rthorne@rthorne.net>; Date: Mon, 16 Sep 2019 12:20:20 -0500; The hairpin is a good place to start. The weak point is the ring terminals used to attach the coil to the feed point bolts. I found the hairpin coil laying near the base of my tower. The winds here f; /archives//html/Towertalk/2019-09/msg00406.html (8,951 bytes)

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