- 1. Topband: RX Power over Coax (score: 1)
- Author: Dennis W0JX via Topband <topband@contesting.com>
- Date: Tue, 6 Oct 2020 04:44:51 +0000 (UTC)
- Regarding the issue of voltage over coax to power the preamps used at the base of short verticals, Lee, K7TJR, developed an alternative power feed system for his new SMD preamps using a separate RG6
- /archives//html/Topband/2020-10/msg00035.html (7,338 bytes)
- 2. Topband: RX Power over Coax (score: 1)
- Author: Lee STRAHAN <k7tjr@msn.com>
- Date: Tue, 6 Oct 2020 07:15:56 +0000
- Hi Dennis and top band interested folks, The very first amps I made for myself were using an external power wire. Using external power required some pretty heavy choking on each end of that added wir
- /archives//html/Topband/2020-10/msg00036.html (12,656 bytes)
- 3. Re: Topband: RX Power over Coax (score: 1)
- Author: donovanf@erols.com
- Date: Tue, 6 Oct 2020 18:09:43 -0400 (EDT)
- Hi Lee, Your testing will be inconclusive unless you inject water into your connectors, or you could just move to Maryland where we get at least 45 inches of annual rainfall and it gets into everythi
- /archives//html/Topband/2020-10/msg00042.html (13,564 bytes)
- 4. Re: Topband: RX Power over Coax (score: 1)
- Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
- Date: Tue, 6 Oct 2020 16:20:17 -0700
- Exactly right. I had trouble with "critters" chewing my coax. Nothing bad happened until it rained. Then the rain got into the coax and the water interacted with the DC voltage on the coax; terrible
- /archives//html/Topband/2020-10/msg00043.html (8,149 bytes)
- 5. Re: Topband: RX Power over Coax (score: 1)
- Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
- Date: Wed, 07 Oct 2020 10:05:22 -0400
- I use a 600 foot long run of CATV coax to power a remote pre-amp at the DHDL-s, delivering +12V/100 mA via the central conductor (return via the shield). Prior to installing the F plugs I spray the c
- /archives//html/Topband/2020-10/msg00044.html (9,551 bytes)
- 6. Re: Topband: RX Power over Coax (score: 1)
- Author: Mark - N5OT <r-emails@n5ot.com>
- Date: Wed, 7 Oct 2020 09:22:22 -0500
- In my head this is becoming "101 uses for old network cable" which is great because I've got a ton of it coiled up neatly and set aside but not thrown away :-) Thanks topbanders. Still working on th
- /archives//html/Topband/2020-10/msg00045.html (9,464 bytes)
- 7. Re: Topband: RX Power over Coax (score: 1)
- Author: Grant Saviers <grants2@pacbell.net>
- Date: Wed, 7 Oct 2020 07:45:23 -0700
- Rick, Did you CM choke the power and signal leads? or the whole cable? Grant KZ1W Still working on this year's vertical. It will be ready for CQWW is the plan. 73 - Mark N5OT On 10/6/2020 6:20 PM, R
- /archives//html/Topband/2020-10/msg00046.html (9,837 bytes)
- 8. Re: Topband: RX Power over Coax (score: 1)
- Author: "Sam Josuweit" <samjos@epix.net>
- Date: Wed, 7 Oct 2020 10:58:48 -0400
- Does anyone have an audio recording of what micro-arcing sounds like they could post somewhere? Sam(N3XZ) I use a 600 foot long run of CATV coax to power a remote pre-amp at the DHDL-s, delivering +1
- /archives//html/Topband/2020-10/msg00047.html (10,230 bytes)
- 9. Re: Topband: RX Power over Coax (score: 1)
- Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
- Date: Wed, 7 Oct 2020 08:29:57 -0700
- Did you CM choke the power and signal leads? or the whole cable? Grant KZ1W I should clarify that the CAT-5 was only used to drive relay coils. It did not power up a preamp, because I did not need a
- /archives//html/Topband/2020-10/msg00048.html (8,991 bytes)
- 10. Topband: RX Power over Coax (score: 1)
- Author: Roger Parsons via Topband <topband@contesting.com>
- Date: Wed, 7 Oct 2020 18:55:44 +0000 (UTC)
- I just wanted to agree that using coax feeders for power as well as rf can lead to noise. I have a lot of beverages and other receive antennas, some of which are thousands of feet from the shack, and
- /archives//html/Topband/2020-10/msg00049.html (8,407 bytes)
This search system is powered by
Namazu