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Total 12 documents matching your query.

1. [TowerTalk] Ground Resistance (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Tue, 8 Aug 2006 15:08:18 -0700 (PDT)
I have followed the posts on radials and ground resistance for some time. Is there any simple way to measure the impedance of the ground radial system as you install them to know when you have enough
/archives//html/Towertalk/2006-08/msg00210.html (7,326 bytes)

2. [TowerTalk] Dipping The Tower (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Sun, 17 Sep 2006 05:44:10 -0700 (PDT)
I have installed a shunt wire 16" from my 68' tower. I grounded the shunt wire with the two loops in the wire as is show Low Band Dxing. But, when I attach the dip meter coil to my MFJ-269 and put th
/archives//html/Towertalk/2006-09/msg00585.html (7,031 bytes)

3. [TowerTalk] Dipping The Tower (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Sun, 17 Sep 2006 17:48:38 -0700 (PDT)
Bill & Dan: I just hooked up the MFJ-269 like I normally do and it showed resonance @ 2.278 MHz. John -- Do you Yahoo!? Get on board. You're invited to try the new Yahoo! Mail. ______________________
/archives//html/Towertalk/2006-09/msg00610.html (7,019 bytes)

4. [TowerTalk] Shunt-Fed Tower Electrical Length (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Mon, 18 Sep 2006 04:11:02 -0700 (PDT)
Now that I have the resonant frequency of 2.278 MHz for my 68' tower. What should the design frequency be for 160 Meters? I have plugged 1.8 and 1.9 MHz into the formula for computing electrical leng
/archives//html/Towertalk/2006-09/msg00629.html (6,827 bytes)

5. [TowerTalk] Electric Winches (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Sun, 24 Sep 2006 11:30:20 -0700 (PDT)
I have been cranking my tilt-over Rohn 25 tower up and down with a manual boat winch for over a year now. Dutton-Lainson StrongArm 120V AC Electric Winch ? 4000-Lb. Capacity I have seen these electri
/archives//html/Towertalk/2006-09/msg00806.html (7,314 bytes)

6. [TowerTalk] Prop Pitch Motor (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Tue, 23 Jan 2007 14:19:07 -0800 (PST)
Why would you use a prop pitch motor as opposed to a regular rotor? John W0TMM -- Don't get soaked. Take a quick peak at the forecast with theYahoo! Search weather shortcut. _________________________
/archives//html/Towertalk/2007-01/msg00656.html (6,910 bytes)

7. [TowerTalk] VERTICAL ARRAY RADIALS (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Mon, 2 Apr 2007 17:29:24 -0700 (PDT)
I saw a diagram 11-99 (third edition) of Low Band DXing on the "Recommended radial layouts for multi-element arrays." It shows bus wire used to join the radials where they would overlap or touch one
/archives//html/Towertalk/2007-04/msg00043.html (7,126 bytes)

8. [TowerTalk] Fwd: Re: vertical ground experiment (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Thu, 21 Jun 2007 14:45:20 -0700 (PDT)
If I have a 1/4 wave vertical and the feedpoint measures 27 ohms, what does that tell me? Note: forwarded message attached. John W0TMM -- Choose the right car based on your needs. Check out Yahoo! Au
/archives//html/Towertalk/2007-06/msg00686.html (7,183 bytes)

9. Re: [TowerTalk] Fwd: Re: vertical ground experiment (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Thu, 21 Jun 2007 15:08:15 -0700 (PDT)
That was in reference to: "A 1/4 wave vertical over perfect ground should measure about 36 ohms of pure resistance at the feed point. Any loss in the ground will be added to the 36 ohms and can be ea
/archives//html/Towertalk/2007-06/msg00688.html (8,849 bytes)

10. Re: [TowerTalk] Fwd: Re: vertical ground experiment (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Thu, 21 Jun 2007 16:54:39 -0700 (PDT)
What I am attempting to understand is there any correlation between the numbers of radials and efficiency. As I add 6 or more radials I checked the Rs & Xs numbers with my MFJ-269. The Rs reading kee
/archives//html/Towertalk/2007-06/msg00696.html (10,707 bytes)

11. [TowerTalk] JK1ZW (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Thu, 12 Jul 2007 10:06:16 -0700 (PDT)
I have not been able to get spots from JK1ZW for some time now. Have they changed their host address or anything else? John W0TMM -- Need a vacation? Get great deals to amazing places on Yahoo! Trave
/archives//html/Towertalk/2007-07/msg00535.html (6,702 bytes)

12. [TowerTalk] Fwd: JK1ZW (score: 1)
Author: John Cowan <w0tmm@yahoo.com>
Date: Thu, 12 Jul 2007 10:39:40 -0700 (PDT)
Sorry. Sent to the wrong reflector. Note: forwarded message attached. John W0TMM -- Luggage? GPS? Comic books? Check out fitting gifts for grads at Yahoo! Search. ____________________________________
/archives//html/Towertalk/2007-07/msg00536.html (6,304 bytes)

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