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#1
June 4th 04, 02:18 PM
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Q: How do I inject 12VDC to WEFAX preamp?
Friends,
Thx for reading. I am trying to figure out how to inject 12VDC onto the coax up to my QFH antenna with built-in preamp. I am using the Hamtronics R137 scanning recvr and there is no accomodation for this need. Help? Thx Harry N1QVE |
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#2
June 4th 04, 07:28 PM
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www.wsplc.com/acatalog/Amplifiers_Masthead.html
mike "Harry White" wrote in message om... Friends, Thx for reading. I am trying to figure out how to inject 12VDC onto the coax up to my QFH antenna with built-in preamp. I am using the Hamtronics R137 scanning recvr and there is no accomodation for this need. Help? Thx Harry N1QVE --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.693 / Virus Database: 454 - Release Date: 31/05/2004 |
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#3
June 4th 04, 10:52 PM
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or the cheats way.
an inductor & a capacitor. mike "mike" wrote in message news:hb3wc.81$WX6.76@newsfe6-win... www.wsplc.com/acatalog/Amplifiers_Masthead.html mike "Harry White" wrote in message om... Friends, Thx for reading. I am trying to figure out how to inject 12VDC onto the coax up to my QFH antenna with built-in preamp. I am using the Hamtronics R137 scanning recvr and there is no accomodation for this need. Help? Thx Harry N1QVE --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.693 / Virus Database: 454 - Release Date: 31/05/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.693 / Virus Database: 454 - Release Date: 31/05/2004 |
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#4
June 5th 04, 03:07 AM
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In article ,
says... Friends, Thx for reading. I am trying to figure out how to inject 12VDC onto the coax up to my QFH antenna with built-in preamp. I am using the Hamtronics R137 scanning recvr and there is no accomodation for this need. http://www.advancedreceiver.com/page26.html They make a marvelous little DC injector that I'm using in my van to feed DC power to the GPS antenna (it requires more than 5V bias). They work great, and they're cheap! ($30-$40 or so). AR makes lots of other nice products too. In fact, I would consider their web site to be dangerous to one's checkbook. Keep the peace(es). -- Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute. (Known to some as Bruce Lane, ARS KC7GR, kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?" |
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#5
June 5th 04, 04:58 AM
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Dr. Anton T. Squeegee wrote:
AR makes lots of other nice products too. In fact, I would consider their web site to be dangerous to one's checkbook. Yup, just lookie here... Broadband preamp... http://www.advancedreceiver.com/page47.html Hummm... Put one of those puppies right underneath the D130J... ^_^ -Donald -- "A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort." -Herm Albright |
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#6
June 26th 04, 11:48 PM
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No, no, no. He needs a 12VDC block. Avcom-Ramsey sells them but they
are pricey. DownEast Microwave makes a good one. I have used them for GOES and INMARSAT reception. You will have the choice of what type of connectors to have monitored. I prefer the female "N" connectors and use a "N" to female "F". Grove Enterprises sells the adapters. Your other connector choice will be the BNC. Do a Google search for Avcom-Ramsey and try www.downeastmicrowave.com. Buy the 12VDC power supply, 3 amp model is fine from Radio Shack. Donald K wrote: Dr. Anton T. Squeegee wrote: AR makes lots of other nice products too. In fact, I would consider their web site to be dangerous to one's checkbook. Yup, just lookie here... Broadband preamp... http://www.advancedreceiver.com/page47.html Hummm... Put one of those puppies right underneath the D130J... ^_^ -Donald -- "A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort." -Herm Albright |
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#7
June 27th 04, 03:31 AM
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On Sat, 26 Jun 2004 18:48:36 -0400, john wilson
wrote: No, no, no. He needs a 12VDC block. http://www.hamtv.com/pdf.files/Antmtg.pdf describes how to inject 12VDC in the shack and strip it off at the antenna for a preamp. Takes a cap and an inductor at each end. FWIW. Steve WA3SWS ************************************************** ******************* Steve Uhrig, SWS Security, Maryland (USA) Mfrs of electronic surveillance equip website http://www.swssec.com tel +1+410-879-4035, fax +1+410-836-1190 "In God we trust, all others we monitor" ************************************************** ******************* |
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