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1. [TenTec] Low pass filter (score: 1): Author: "Ten-Tec Inc. Amateur Radio Sales" <sales@tentec.com>; Date: Mon, 01 Nov 2004 12:59:06 -0500; Hello: Anyone on the list have a used 1500 watt capable low pass filter they'd be interested in parting with? Need one for the K4JNY / W4PA contest station. Thanks Scott W4PA -- Ten-Tec, Inc., 1185 D; /archives//html/TenTec/2004-11/msg00017.html (7,887 bytes)
2. Re: [TenTec] Low pass filter (score: 1): Author: "Kurt" <wa8vbx@wideopenwest.com>; Date: Mon, 1 Nov 2004 13:23:47 -0500; Hey Scott I have a RL Drake 1000 Watt Max, LP filter if you are interested in it. Kurt WA8VBX -- Original Message -- From: "Ten-Tec Inc. Amateur Radio Sales" <sales@tentec.com> To: <tentec@contesting; /archives//html/TenTec/2004-11/msg00018.html (8,199 bytes)
3. Re: [TenTec] Low pass filter (score: 1): Author: "n4lq" <n4lq@iglou.com>; Date: Mon, 01 Nov 2004 14:24:40 -0500; Scott: I have a Johnson LP filter, 250-20 rated by Johnson for 1kw. It's your's if you want it. I don't know about 1500 watts but this Johnson stuff was built tough. Manual ftp://bama.sbc.edu/downloa; /archives//html/TenTec/2004-11/msg00019.html (9,146 bytes)
4. Re: [TenTec] Low pass filter (score: 1): Author: "Ten-Tec Inc. Amateur Radio Sales" <sales@tentec.com>; Date: Mon, 01 Nov 2004 14:14:30 -0500; Hi: Thanks - I need 1500 watts :-) Scott At 01:23 PM 11/1/04 -0500, you wrote: Hey Scott I have a RL Drake 1000 Watt Max, LP filter if you are interested in it. Kurt WA8VBX -- Original Message -- Fro; /archives//html/TenTec/2004-11/msg00020.html (10,251 bytes)
5. Re: [TenTec] Low pass filter (score: 1): Author: "Phil Chambley, Sr." <k4dpk@comcast.net>; Date: Mon, 1 Nov 2004 14:52:47 -0500; That Johnson 250-20 is rated for more than 1 KW of AM. It'll handle 3 KW SSB, anyway. Phil K4DPK -- Original Message -- From: "n4lq" <n4lq@iglou.com> To: <tentec@contesting.com> Sent: Monday, Novembe; /archives//html/TenTec/2004-11/msg00021.html (9,619 bytes)
6. Re: [TenTec] Low pass filter (score: 1): Author: "n4lq" <n4lq@iglou.com>; Date: Mon, 01 Nov 2004 14:57:52 -0500; 5kw ssb according to the manual _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec; /archives//html/TenTec/2004-11/msg00022.html (11,021 bytes)
7. [TenTec] Low Pass Filter (score: 1): Author: Jim WA9YSD <wa9ysd@yahoo.com>; Date: Sat, 17 May 2008 11:38:14 -0700 (PDT); Oak Bay use to make a pretty good one. Not sure if they still are making them. I have tried others with various affects. Oak Bay seamed to be most effective. .I feel there are other issues to deal wi; /archives//html/TenTec/2008-05/msg00355.html (6,904 bytes)
8. [TenTec] Low Pass Filter (score: 1): Author: "Ron Tate" <rhtate@tampabay.rr.com>; Date: Sat, 17 May 2008 15:34:35 -0400; The August 2002 Product Review had an excellent review and measurements of the most popular high power filters. You can read the article on the members side of the ARRL. org web site. I have used the; /archives//html/TenTec/2008-05/msg00358.html (6,904 bytes)
9. Re: [TenTec] Low Pass Filter (score: 1): Author: "DAVID HELLER" <dtx@verizon.net>; Date: Sun, 18 May 2008 01:07:52 -0400; Radiation from a feedline or from the antenna proper is radiaton, which is what a transmitter is supposed to be doing for a living. A good match is just supposed to increase the amount of transmitter; /archives//html/TenTec/2008-05/msg00367.html (9,596 bytes)
10. Re: [TenTec] Low Pass Filter (score: 1): Author: "John K Gotwals" <john@gotwals.com>; Date: Sun, 18 May 2008 13:07:39 -0400; Also, keep in mind that direct radiation into a poorly shielded TV set can create TVI. In my previous location I used an Orion driving a Drake L-4B, and the antenna was a ground mounted Butternut ver; /archives//html/TenTec/2008-05/msg00376.html (11,156 bytes)
11. [TenTec] Low Pass Filter (score: 1): Author: "JAMES HANLON" <knjhanlon@msn.com>; Date: Sun, 18 May 2008 11:39:30 -0600; There is an R. L. Drake Low Pass Filter on ebay, item 320251164898, ending at 12:58 PDT Sunday. Its current price is $8.28 with two bids. It should be a good one. There is also a Nye Viking filter, i; /archives//html/TenTec/2008-05/msg00377.html (8,515 bytes)
12. Re: [TenTec] Low Pass Filter (score: 1): Author: Edward Sylvester <navydude1962@yahoo.com>; Date: Sun, 18 May 2008 10:41:44 -0700 (PDT); As for LPF, should I use two; one on the output of the linear and one on the output of the radio? Will double by RF supression or is this overkill?? Ed NI6S There is also a Nye Viking filter, item 29; /archives//html/TenTec/2008-05/msg00378.html (9,071 bytes)
13. Re: [TenTec] Low Pass Filter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 18 May 2008 11:54:11 -0600; The filter between the driver and the PA won't help harmonics detectably and may upset the match between the two units. 73, Jerry, K0CQ _______________________________________________ TenTec mailing; /archives//html/TenTec/2008-05/msg00379.html (8,257 bytes)
14. Re: [TenTec] Low Pass Filter (score: 1): Author: Edward Sylvester <navydude1962@yahoo.com>; Date: Sun, 18 May 2008 10:55:05 -0700 (PDT); So, Jerry, just have it at the output of the amp?? The filter between the driver and the PA won't help harmonics detectably and may upset the match between the two units. 73, Jerry, K0CQ ____________; /archives//html/TenTec/2008-05/msg00380.html (8,400 bytes)
15. Re: [TenTec] Low Pass Filter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 18 May 2008 13:20:44 -0600; Yes and as close to the amp as possible, not with a few feet or more of coax between the amp and the filter. Keep that coax jumper under a foot. The PA running class B makes lots of harmonics even wh; /archives//html/TenTec/2008-05/msg00382.html (8,564 bytes)
16. Re: [TenTec] Low Pass Filter (score: 1): Author: Edward Sylvester <navydude1962@yahoo.com>; Date: Sun, 18 May 2008 12:21:52 -0700 (PDT); Thank you, Jerry~!! Yes and as close to the amp as possible, not with a few feet or more of coax between the amp and the filter. Keep that coax jumper under a foot. The PA running class B makes lots; /archives//html/TenTec/2008-05/msg00383.html (8,659 bytes)
17. Re: [TenTec] Low Pass Filter (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 18 May 2008 16:09:31 -0400; I use two, and its probably overkill. I use one before the linear, and then I use one that comes after the antenna tuner (and linear). I'd guess I get very little additional bang for the buck that wa; /archives//html/TenTec/2008-05/msg00384.html (10,626 bytes)
18. Re: [TenTec] Low Pass Filter (score: 1): Author: "Ron Castro" <ronc@sonic.net>; Date: Sun, 18 May 2008 13:48:03 -0700; The unit after the tuner may be subject to very high SWR unless your antennas are all have fairly low SWR. A severe mismatch could cause voltage or current sufficient to damage the second unit. But l; /archives//html/TenTec/2008-05/msg00385.html (8,942 bytes)
19. Re: [TenTec] Low Pass Filter (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 18 May 2008 17:00:43 -0400; That is correct. My antennas are all resonant, and cut right close (or adjusted right close) to where I generally work in the band. In addition, the impedance of my antennas at resonance is very clos; /archives//html/TenTec/2008-05/msg00387.html (10,327 bytes)
20. Re: [TenTec] Low Pass Filter (score: 1): Author: "JAMES HANLON" <knjhanlon@msn.com>; Date: Mon, 19 May 2008 11:55:15 -0600; Ed, A properly designed filter should be terminated in its characteristic impedance at your operating frequency, probably 50 ohms, and will present a 50 ohm impedance at its input at your operating f; /archives//html/TenTec/2008-05/msg00397.html (11,633 bytes)

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