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241. [TenTec] Re: parallel lines rated by losses (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Tue, 15 Oct 2002 13:57:39 -0500; OK, without being too long, look at any good antenna text and you should find the fact that the higher the impedance of a feedline, the lower the current and thus the resistive losses. In a ranking o; /archives//html/TenTec/2002-10/msg00286.html (9,655 bytes)
242. [TenTec] Open wire (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Fri, 18 Oct 2002 14:16:22 -0500; If the feeders are truly balanced, and narrow spaced for the frequency in use, such as window line 450 ohm nominal and 300 ohm nominal at HF bands, there should be minimal field outside the feeders d; /archives//html/TenTec/2002-10/msg00344.html (9,614 bytes)
243. [TenTec] Re: TWINCOM feedline? (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Fri, 18 Oct 2002 15:23:27 -0500; Shawn, Absolutely! The old bugaboo of feedline effects to a TV just do not hold water today with cable TV, higher IFs than 15m band, (the old TVs had the IF at amateur band), and fewer stations at Ch; /archives//html/TenTec/2002-10/msg00345.html (8,656 bytes)
244. [TenTec] Re: TWINCOM feedline? (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Fri, 18 Oct 2002 15:29:36 -0500; A method of helping a bad cable TV installation, (which is a violation and could be reported to FCC if cable company does not fix it), is to use a back to back set of baluns, so as to filter the cabl; /archives//html/TenTec/2002-10/msg00346.html (8,588 bytes)
245. [TenTec] Re back to back TV baluns (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Fri, 18 Oct 2002 19:11:59 -0500; Indeed, what was described is for common mode RFI, the most common type found on TV cable systems due to leaks. 73, Stuart K5KVH; /archives//html/TenTec/2002-10/msg00355.html (7,987 bytes)
246. [TenTec] Re: TWINCOM feedline? (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Mon, 21 Oct 2002 15:57:43 -0500; Good point Gary, a good ground, Thanks! Stuart K5KVH; /archives//html/TenTec/2002-10/msg00430.html (8,030 bytes)
247. [TenTec] Open Wire (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Mon, 21 Oct 2002 17:02:14 -0500; All true, all true. Yes, the balanced feeders must have current measured, and I advocate use of two RF ammeters, so as to upset the line the same on both sides. Yet, L. B. Cebik reports his experimen; /archives//html/TenTec/2002-10/msg00438.html (8,996 bytes)
248. [TenTec] check your repairs / pegasus leaky finals (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Mon, 21 Oct 2002 17:10:39 -0500; Repairs to ANY rig should be checked upon receipt by first opening the case and checking for loose or missing pieces. Shipping can do this! Air or Ground, and by any shipper! Been there done that on; /archives//html/TenTec/2002-10/msg00439.html (6,912 bytes)
249. [TenTec] Ground Rod alternatives (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Tue, 22 Oct 2002 13:18:04 -0500; Down here, the Electric Utility (Austin Energy), is faced with rock (limestone) down about 18 inches in Western part of city. They did some modeling and experiments, and determined an effective Elect; /archives//html/TenTec/2002-10/msg00454.html (8,007 bytes)
250. [TenTec] Re: G5RV (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Tue, 22 Oct 2002 13:33:47 -0500; Glen, I did this with the ZS6BKW version ,(WARC optimized) G5RV about 10 years ago. It is called the K5KVH antenna, and has all the doublet part and the ladder line or twin line part in same horizont; /archives//html/TenTec/2002-10/msg00457.html (7,425 bytes)
251. [TenTec] Grounds & 450 ohm Ladder Line (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Wed, 23 Oct 2002 13:43:47 -0500; All good info flowing: Remember, ground loops can appear on an AC ground system whose lengths in a loop, before getting to the real ground, is odd multiples of a quarter wave length at a frequency. I; /archives//html/TenTec/2002-10/msg00477.html (7,941 bytes)
252. [TenTec] Grounds & 450 ohm Ladder Line (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Wed, 23 Oct 2002 13:46:47 -0500; Those storms can sneak up on folks. But safest to shut down and disconnect your rigs when storms are within 10 miles. Some lightning has struck from a cloud that far away, albeit an extreme case. My; /archives//html/TenTec/2002-10/msg00478.html (7,452 bytes)
253. [TenTec] ZS6BKW doublet modfied to K5KVH, derived from G5RV (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Wed, 23 Oct 2002 14:03:07 -0500; To Bam and others, The K5KVH uses the ZS6BKW dimensions for 450 ohm ladder line to a wire dipole, all arranged if seen from an airplane as a Letter "T". That, is they are all horizontal, with ladder; /archives//html/TenTec/2002-10/msg00479.html (7,362 bytes)
254. [TenTec] Re: Argonaut Review (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Thu, 24 Oct 2002 14:11:35 -0500; Re Argonaut V: With its triple conversion essentially, you can operate the first IF at optimum, and then follow that with AGC stages that make a separate RF gain unnecessary. Most modern radios with; /archives//html/TenTec/2002-10/msg00501.html (7,456 bytes)
255. [TenTec] Argonaut V direct comparisons with other TT rigs (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Thu, 24 Oct 2002 14:16:58 -0500; Remember, you can order an Argonaut V and try it out for 30 days, and always return it if not up to your expectations. 73, Stuart K5KVH; /archives//html/TenTec/2002-10/msg00502.html (6,787 bytes)
256. [TenTec] RF in SSB on my Omni VI (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Thu, 24 Oct 2002 14:43:28 -0500; Definitely agree with George, W5YR, that you should forgo the outside ground rod connection, if the distance to it is any length of 8 foot or more. Other clues to the proximity feedback from beam to; /archives//html/TenTec/2002-10/msg00503.html (8,793 bytes)
257. [TenTec] RF in SSB on my Omni VI (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Thu, 24 Oct 2002 14:43:34 -0500; Definitely agree with George, W5YR, that you should forgo the outside ground rod connection, if the distance to it is any length of 8 foot or more. Other clues to the proximity feedback from beam to; /archives//html/TenTec/2002-10/msg00504.html (8,765 bytes)
258. [TenTec] RF in SSB on my Omni VI (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Thu, 24 Oct 2002 14:46:53 -0500; George, one other thing, back off on drive to the Amplifier,and see if the Omni is just overdriving it. The effect on your ability to contact stations will be minimal, but you may well be able to giv; /archives//html/TenTec/2002-10/msg00505.html (7,866 bytes)
259. [TenTec] Power Power Power - revisited.. (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Fri, 25 Oct 2002 14:09:34 -0500; Please all, read Maxwell's book "Reflections" (either I or II) or the same QST pieces reprinted on the QST web site. SWR is RE REFLECTED from the tank circuit, (if no tuner) and does NOT enter the fi; /archives//html/TenTec/2002-10/msg00518.html (7,946 bytes)
260. [TenTec] Power Power Power - revisited.. (score: 1): Author: rohre@arlut.utexas.edu (Stuart Rohre); Date: Fri, 25 Oct 2002 14:15:33 -0500; Check the rig with trusted power meter running into a dummy load of 50 ohms. IF you are getting more than the 80 watts of so most report as normal Output, adjust the rig to proper drive level. It cou; /archives//html/TenTec/2002-10/msg00519.html (8,016 bytes)

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