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1. [TowerTalk] Connector and switch losses (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sat, 16 Jan 1999 12:43:20 -0500; Can anyone tell me the approximate loss for a PL-259 connector at 28 MHz? Also, does anyone know the approximate loss at 28 MHz for antenna switching relays like the ones used in the Ameritron RCV-8?; /archives//html/Towertalk/1999-01/msg00285.html (9,841 bytes)
2. [TowerTalk] Connector and switch losses (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Sun, 17 Jan 1999 16:38:35 -0500; Immeasurable without of lab instruments. In the hundredths of a dB. switching I assume you have a RCS-8V. In that case, the loss is Immeasurable without lab instruments. In the hundredths of dB. Eve; /archives//html/Towertalk/1999-01/msg00297.html (10,022 bytes)
3. [TowerTalk] Connector and switch losses (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Sun, 17 Jan 1999 16:36:45 -0500; Dick, I've not read the AEA manual, but it should warn you about the method used to measure able loss. That loss method is dependent on cable Zo. With connectors and relays in line, you will have imp; /archives//html/Towertalk/1999-01/msg00298.html (9,687 bytes)
4. [TowerTalk] Connector and switch losses (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 18 Jan 1999 00:44:46 -0500; Thanks, Tom. That sounds like what's happening. The coax length will change by a few feet when I get done with my station changes, so perhaps that will shift the bumps enough to confirm the theory.; /archives//html/Towertalk/1999-01/msg00301.html (9,214 bytes)
5. [TowerTalk] Connector and switch losses (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 18 Jan 1999 00:56:59 -0500; I'm not going to touch that line... I assume you are referring to insertion loss from in-line bandpass filters. I'm planning on using combinations of parallel 1/4 and 1/2 wave open and shorted stubs; /archives//html/Towertalk/1999-01/msg00302.html (9,154 bytes)
6. [TowerTalk] Connector and switch losses (score: 1): Author: aa0cy@nwrain.com (Bob Wanderer); Date: Sat, 16 Jan 1999 21:09:51 -0800; First off, you need to take into consideration the "uncertainties" of the measurement device. IOW, what is the accuracy of the AEA device. Most devices which measure loss are, at best, plus or minus; /archives//html/Towertalk/1999-01/msg00303.html (12,010 bytes)
7. [TowerTalk] Connector and switch losses (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Mon, 18 Jan 1999 08:31:15 -0500; Hi Bob, The AEA unit, like the MFJ unit, measures SWR to determine loss. Return loss is easily determined by any instrument that measures SWR, and transmission loss is 1/2 of return loss when the far; /archives//html/Towertalk/1999-01/msg00305.html (11,357 bytes)
8. [TowerTalk] Connector and switch losses (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Mon, 18 Jan 1999 09:01:34 -0500; filters. noise I effect. I think marketing and folklore has us all convinced stubs are lossless. Just like lumped components, ALL stubs have loss. Coaxial cable stubs can be particularly lossy. They; /archives//html/Towertalk/1999-01/msg00306.html (9,791 bytes)
9. [TowerTalk] Connector and switch losses (score: 1): Author: w2vjn@rosenet.net (George Cutsogeorge); Date: Mon, 18 Jan 1999 16:07:03 -0800; Here are some measured numbers for the subject of this discussion. Loss through the Top Ten A/B relay box at 28 MHz is 0.02 dB. The path through it includes 2 SO239s and 2 relay contacts. Losses thro; /archives//html/Towertalk/1999-01/msg00309.html (8,971 bytes)
10. [TowerTalk] Connector and switch losses (score: 1): Author: w8ji.tom@MCIONE.com (w8ji.tom); Date: Tue, 19 Jan 1999 11:38:54 -0500; Hi George, It that a bandpass filter that rejects all frequencies above and below the operating frequency? One dB amounts to about 20% of applied power. At 1500 watts, filter dissipation would amount; /archives//html/Towertalk/1999-01/msg00341.html (10,867 bytes)

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