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Total 15 documents matching your query.

1. [Towertalk] Newbie Question (score: 1): Author: thoele@txcyber.com (Troy Thoele); Date: Thu, 18 Jul 2002 08:40:12 -0500; Greetings - I have been on the list for a while, and finally took my test (no code tech, I'm still working on code). It appears I passed! I have a 100ft freestander going up, it's a Rohn similar to a; /archives//html/Towertalk/2002-07/msg00478.html (8,243 bytes)
2. [Towertalk] Newbie Question (score: 1): Author: ac7nj@bentonrea.com (ac7nj@bentonrea.com); Date: Thu, 18 Jul 2002 06:57:52 -0700; Troy, You have asked the biggest and most controversial questions in amateur radio. Money is normally the limiting factor. 7/8" heliax is over kill on HF it would be like using a Boing 747 for two pa; /archives//html/Towertalk/2002-07/msg00479.html (9,861 bytes)
3. [Towertalk] Newbie Question (score: 1): Author: n3rr@erols.com (Bill Hider (N3RR)); Date: Thu, 18 Jul 2002 10:31:47 -0400; Troy, Take a look at the station design outline and the detailed discussion on my website. While I designed a contest station, the process is the same for any application. You will learn a bunch from; /archives//html/Towertalk/2002-07/msg00483.html (10,368 bytes)
4. [Towertalk] Newbie Question (score: 1): Author: RedHaines@centurytel.net (Red); Date: Thu, 18 Jul 2002 12:44:34 -0500; Troy; Normally I'd agree that heliax is overkill on HF, but suggest you check the attenuation of any coax, expecially on 10 and 15 meter. Ordinary RG-8 loses about 1.2-1.3 dB per 100 feet at 30 MHz.; /archives//html/Towertalk/2002-07/msg00487.html (7,797 bytes)
5. [Towertalk] Newbie Question (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 18 Jul 2002 14:01:08 -0400; But 75-ohm 3/4" CATV hardline is just a hair lossier than 7/8" Heliax at 30 MHz (.3-.35 dB/100 ft), can often be bought for free, and lends itself to inexpensive connector fabrication. 73, Pete N4ZR; /archives//html/Towertalk/2002-07/msg00488.html (8,369 bytes)
6. Fw: [Towertalk] Newbie Question (score: 1): Author: NN7K@reno.rmci.net (NN7K@reno.rmci.net); Date: Thu, 18 Jul 2002 11:05:21 -0700; That 3 db (or so) comes to about 1/2 of a "S" unit- still not usually enough to make, or break you. and even it can be mitigated by preamp on the tower , in the recieve direction. signal would have t; /archives//html/Towertalk/2002-07/msg00489.html (8,741 bytes)
7. Fw: [Towertalk] Newbie Question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 18 Jul 2002 18:58:21 -0400; 3dB of transmitting power increase can sound like a major improvement to the other guy when signals are close to noise floor. As a general rule feedline loss, like antenna gain, is unimportant for r; /archives//html/Towertalk/2002-07/msg00491.html (9,318 bytes)
8. Fw: [Towertalk] Newbie Question (score: 1): Author: NN7K@reno.rmci.net (NN7K@reno.rmci.net); Date: Thu, 18 Jul 2002 16:56:08 -0700; Tom, tho what you say is GENERALLY true, mught find this of interest- Am a 6 meter op for the most part (for 35 + years!) have little use for "DC" bands, however , on more than a few (started a coupl; /archives//html/Towertalk/2002-07/msg00493.html (10,635 bytes)
9. [Towertalk] Newbie Question (score: 1): Author: troy.flowers@wavecom-inc.com (Troy Flowers); Date: Thu, 18 Jul 2002 11:16:59 -0700; Ok I'm a relative newbie so I'll ask also. I ran 1/2" Heliax up my tower for HF. But 75 ohm CATV line can be used also? Being a cheapskate I'd much rather spend nothing so explain. My radio/amp wants; /archives//html/Towertalk/2002-07/msg00498.html (9,791 bytes)
10. [Towertalk] Newbie Question (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Fri, 19 Jul 2002 08:02:44 -0400; Well, here's what I did. RG-213 from the antennas to the antenna switch. At the antenna switch (at the bottom of the tower) I switched to 75-ohm CATV, using a multiple of a half wavelength at the low; /archives//html/Towertalk/2002-07/msg00501.html (9,985 bytes)
11. [Towertalk] Newbie Question (score: 1): Author: n4kg@juno.com (n4kg@juno.com); Date: Fri, 19 Jul 2002 06:32:58 -0600; There are several ways to use 75 Ohm CATV Hardline in 50 ohm systems. The simplest method is to use a multiple of 1/2 Wavelength (electrical) since impedances repeat every 1/2 WL in a transmission li; /archives//html/Towertalk/2002-07/msg00504.html (12,680 bytes)
12. Fw: [Towertalk] Newbie Question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 19 Jul 2002 22:45:43 -0400; p is Two or three extra dB does not require a substation when you do it with an amplifier, let alone less feedline loss. As for QRP, I have a different philosophy. I'm impressed by any station who ca; /archives//html/Towertalk/2002-07/msg00518.html (8,656 bytes)
13. Fw: [Towertalk] Newbie Question (score: 1): Author: SPELUNK.SUENO@prodigy.net (EUGENE SMAR); Date: Sat, 20 Jul 2002 01:16:19 -0400; QRP DXCC = 100 pairs of good ears. 73 de Gene Smar AD3F --Original Message-- From: Tom Rauch <w8ji@contesting.com> To: Towertalk <Towertalk@contesting.com>; NN7K@reno.rmci.net <NN7K@reno.rmci.net> To; /archives//html/Towertalk/2002-07/msg00520.html (8,743 bytes)
14. Fw: [Towertalk] Newbie Question (score: 1): Author: jreisert@jlc.net (Joe Reisert); Date: Sat, 20 Jul 2002 10:29:18 -0400; Gene, Whose ears must be good? Surely not the QRP station. In fact, if the DX station is weak, the QRP station will more than likely not get through. QRP requires a reasonable antenna system with lot; /archives//html/Towertalk/2002-07/msg00528.html (10,777 bytes)
15. Fw: [Towertalk] Newbie Question (score: 1): Author: ve7hcb@rac.ca (Chris BONDE); Date: Sat, 20 Jul 2002 10:12:39 -0700; Methinks that a weak signal is relative, or in relation to something. I have heard some stations that others have not and vice versa. If your signal output is stronger than mine then I am a weak sign; /archives//html/Towertalk/2002-07/msg00531.html (9,002 bytes)

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