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Total 7 documents matching your query.

1. [TowerTalk] YCCC 9 circle preamp failure test (score: 1): Author: VE6WZ_Steve <ve6wz@shaw.ca>; Date: Tue, 24 Sep 2019 12:09:41 -0600; Yesterday I decided to measure the actual voltage at base of my short HI-Z verticals while I transmitted on the TX array. Since I first posted about the coupling capacitor failures in these units, I; /archives//html/Towertalk/2019-09/msg00453.html (8,271 bytes)
2. Re: [TowerTalk] YCCC 9 circle preamp failure test (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 24 Sep 2019 11:51:05 -0700; Since I first posted about the coupling capacitor failures in these units, I have received private emails form 4 others with the same problem. My question is what has caused these failures? Is it a l; /archives//html/Towertalk/2019-09/msg00454.html (8,256 bytes)
3. Re: [TowerTalk] YCCC 9 circle preamp failure test (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 24 Sep 2019 12:07:50 -0700; Since I first posted about the coupling capacitor failures in these units, I have received private emails form 4 others with the same problem. My question is what has caused these failures? Is it a l; /archives//html/Towertalk/2019-09/msg00455.html (9,830 bytes)
4. Re: [TowerTalk] YCCC 9 circle preamp failure test (score: 1): Author: Wes <wes_n7ws@triconet.org>; Date: Tue, 24 Sep 2019 13:14:45 -0700; Why all of the complications? The preamps are unity gain. Doesn't the output voltage tell you something about the input voltage? If they saturate during a measurement, turn the power down until the; /archives//html/Towertalk/2019-09/msg00456.html (11,148 bytes)
5. Re: [TowerTalk] YCCC 9 circle preamp failure test (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 24 Sep 2019 13:36:21 -0700; Aha.. I was hunting around for a circuit description. Yeah, it looks there's a noninverting buffer followed by a 1:1 transformer. So it's more of an impedance buffer. What Z does it present to the el; /archives//html/Towertalk/2019-09/msg00457.html (11,950 bytes)
6. Re: [TowerTalk] YCCC 9 circle preamp failure test (score: 1): Author: Wes <wes_n7ws@triconet.org>; Date: Tue, 24 Sep 2019 15:55:59 -0700; Aha.. I was hunting around for a circuit description. Yeah, it looks there's a noninverting buffer followed by a 1:1 transformer. So it's more of an impedance buffer. What Z does it present to the e; /archives//html/Towertalk/2019-09/msg00458.html (8,572 bytes)
7. Re: [TowerTalk] YCCC 9 circle preamp failure test (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 24 Sep 2019 16:32:07 -0700; On 9/24/19 3:55 PM, Wes wrote: On 9/24/2019 1:36 PM, jimlux wrote: On 9/24/19 1:14 PM, Wes wrote: Why all of the complications? The preamps are unity gain. Aha.. I was hunting around for a circuit d; /archives//html/Towertalk/2019-09/msg00459.html (12,093 bytes)

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