Mail Archive Search: <+from:K0FF@ARRL.NET>

Results:

References: [ +from:K0FF@ARRL.NET: 30 ]

Total 30 documents matching your query.

1. Topband: LF, MF Preamps, a background de K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Mon, 22 Jan 2001 09:11:57 -0600; When line loss or noise pickup on the feedline is a significant factor, locating the preamp at the antenna is the preferred method. For 2M and up for example where line losses are high, it is imperat; /archives//html/Topband/2001-01/msg00222.html (11,010 bytes)
2. Topband: Balanced loop preamp/tuner project DE K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Sat, 16 Dec 2000 16:12:30 -0600; Just finished a balanced loop preamp and remote tuner. Has applications in LF and MF frequency range. If interested, check out my homepage and look under "December 2000 Projects". Happy Building, Geo; /archives//html/Topband/2000-12/msg00096.html (6,798 bytes)
3. Topband: Seeking donations for ZD7 (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Mon, 13 Nov 2000 08:26:20 -0600; CONCERNING TOPBAND and VHF ON ZD7: Once again trying to get a package of odds and ends together to send to St. Helena. Anything would be appreciated from your junkbox. They can't get even scrap wire; /archives//html/Topband/2000-11/msg00063.html (7,618 bytes)
4. Topband: 10 Turns on FT-140-43 corr. value DE K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Thu, 2 Nov 2000 08:52:37 -0600; Of course I dropped a decimal point in one of my readouts. 10 T on an FT 140-43 should be 95.0 uH not 950 uH. The actual measured inductances have been running higher, never lower. The AL value is su; /archives//html/Topband/2000-11/msg00007.html (7,244 bytes)
5. Topband: Pennant Transformers design analysis DE K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Wed, 1 Nov 2000 14:25:06 -0600; First of all, after having talked to Earl Cunningham K6SE, my suggestion is to use the exact measurements and techniques described by him for the Pennant transformer. There IS some variation in the p; /archives//html/Topband/2000-11/msg00003.html (9,976 bytes)
6. Topband: K5K DE K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Tue, 24 Oct 2000 18:45:50 -0500; Worked the boys on first call on 160 this morning (dumb luck). Missed them on 80 because my TX antenna had a fault that must have appeared weeks ago, and I didn't bother to ring it out previously ( j; /archives//html/Topband/2000-10/msg00157.html (6,964 bytes)
7. Topband: Beverage Length DE K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Wed, 18 Oct 2000 10:27:52 -0500; With the variables due to ground condition changing as the ground conditions change ( at least in my geographical area...the ground can be dry as a bone and cracked, and the next day be soaked with 5; /archives//html/Topband/2000-10/msg00113.html (8,576 bytes)
8. Topband: receiving antennas (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Wed, 18 Oct 2000 09:03:44 -0500; I agree with Tom, and two practical examples come to mind. First the Pennant, which has a stated gain of MINUS 30 dBi, and the shielded loop (SLOOP) which is also a loser gain wise. Fact is the noise; /archives//html/Topband/2000-10/msg00110.html (7,967 bytes)
9. Topband: Beverage Front to Back Non-exsistant (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Sat, 14 Oct 2000 16:13:49 -0500; I have a feeling that the radials are part of the problem, if they are run in any direction other than that of the Bev wire itself. If they are in a spoke arrangement, they are coupling in signals fr; /archives//html/Topband/2000-10/msg00086.html (7,348 bytes)
10. Topband: Lowering MFJ259 Freq limit . description de K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Tue, 10 Oct 2000 19:01:33 -0500; My MFJ 259 bottoms out at about 1780 kHz, well within tolerance of the specs. On some occasions, especially when building notch filters and bandpass filters for 160, it would be desirable to be able; /archives//html/Topband/2000-10/msg00068.html (7,641 bytes)
11. Topband: Portable 160M Shielded loop. de K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Sun, 8 Oct 2000 18:51:52 -0500; Don, K4ZA is headed down to St.. Maarten in a few weeks and was running short of time to assemble all the equipment, so he asked me to come up with a suitcase-able version of the 160M SLOOP (Shielded; /archives//html/Topband/2000-10/msg00047.html (7,757 bytes)
12. Topband: 160M Bandpass filter drawing. K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Mon, 2 Oct 2000 13:23:35 -0500; Fred, here is a drawing for a 160M bandpass filter. The first section is a 5 element Chebyshev lowpass filter and the second section is a 7 element Chebyshev hipass filter. Different values are given; /archives//html/Topband/2000-10/msg00009.html (8,454 bytes)
13. Topband: Today's project. Weather resistant UNUN for 160. DE K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Wed, 27 Sep 2000 19:07:34 -0500; Nothing new under the sun here, but if you haven't built one of these before, take a look, and you may get some ideas. http://homepages.dstream.net/K0FF/160/160unun Happy Building, Geo>K0FF -- FAQ on; /archives//html/Topband/2000-09/msg00161.html (6,880 bytes)
14. Topband: Need advice: Hy-Tower on 160, and radials Reply de K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Mon, 25 Sep 2000 13:00:12 -0500; right on Gene, scrap their idea of a coil, and consider using a top wire, as high as it can be, to load the thing. . You'll lose the multi band performance that way though, unless you fix it so that; /archives//html/Topband/2000-09/msg00147.html (8,228 bytes)
15. Topband: Concerning UNUNs and Beverages. de K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Sun, 24 Sep 2000 14:30:00 -0500; A few days ago we were talking about UNUN Beverage transformers, and I showed a link to a picture of one that I make and use, which has 16 turns of quadrafilar windings. Some comments were made regar; /archives//html/Topband/2000-09/msg00141.html (9,023 bytes)
16. Topband: Some hole punches we use ...K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Sat, 23 Sep 2000 09:27:24 -0500; Here are some of the holepunches we use around the 160M antenna farm to make those Beverage boxes, relay boxes Baluns and UNUNs, brackets etc. http://homepages.dstream.net/K0FF/HomebrewTips/Greenlee.; /archives//html/Topband/2000-09/msg00138.html (6,678 bytes)
17. Topband: How to tips. 160 related. K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Thu, 21 Sep 2000 16:31:03 -0500; If you're interested in HF and especially MF (160), come see some a few of the ideas that are on the HomebrewTips page. Included is a large picture of the all details of the 160M Shielded Loop (SLOOP; /archives//html/Topband/2000-09/msg00122.html (6,951 bytes)
18. Topband: Univerasl UN-UN RX transformer kit..K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Wed, 20 Sep 2000 07:54:51 -0500; Well after much head scratching and test winding of various people's ideas of matching transformers for Beverages, Loop, Flags Pennants and just about everything else, I've personally decided on a st; /archives//html/Topband/2000-09/msg00107.html (8,081 bytes)
19. Topband: Re: Beverage boxes (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Tue, 19 Sep 2000 06:51:43 -0500; balun? Bob, I use so many different types of boxes there is no one answer. The largest outdoor boxes are Hoffman NEMA 12, steel and with a gasketed door. Also use a lot of fiberglass boxes with a hi; /archives//html/Topband/2000-09/msg00094.html (7,953 bytes)
20. Topband: Loop antenna kit and Bev transformers. DE K0FF (score: 1): Author: K0FF@ARRL.NET (K0FF); Date: Sun, 17 Sep 2000 21:46:34 -0500; The K0FF Loop kit is now available at: http://homepages.dstream.net/K0FF/ForSaleStuff/LoopPartsKit.rtf For the time being I've put the Beverage and Pennant transformers there too. As soon as time all; /archives//html/Topband/2000-09/msg00086.html (7,530 bytes)

Current List: 1 - 20
Page: [1] [2]