Source for L-Band Preamplifier and Bias Tee?
Hello,
I am looking for a Low Noise Preamplifier for L Band and a Bias Tee.
Down East Microwave seems to be closed for the summer. I was looking at one of their 1296 MHz Preamps and wonder if it could work outside the band, like at 1090 MHz. I got a 1569 MHz preamplifier for GOES but do not have a Bias Tee to try it. The ones I saw were either for up to 1 GHz, or for up to 40+ GHz ($$$).
I got a WinRadio WR-LNA-1500 at Dayton but I did not get a chance to really try it. The WR-LNA-1500 managed to fry two of my receiver's front-ends then destroyed itself when I ran it off of vehicle power. This was before I realized what was going on. The US WinRadio Service Center is checking with Australia HQ to see if they fix that model. So I would rather not buy the Winradio Bias Tee just in case there are more problems. Are there any surplus places that sell Bias Tees? I can deal with SMA connectors.
I tried searching for kits or construction articles for preamplifiers but only found some stuff overseas. Do I have to wait for DEM to reopen?
73 Eric
Eric:
Try Mini-Circuits for bias Tees.
They are very high quality and very reasonable in price as well.
I believe the address is: www.mini-circuits.com
Give them a call, or Google them, you'll find them quite easily I am certain!
73!
Ernest A. Erickson, KA9UCE Applied Electronic Communications, AEC 10711 East Verbina Lane Florence, AZ. 85232 520.723.0602 [email protected]
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----- Start Original Message ----- Sent: Tue, 10 Jul 2007 22:31:21 -0700 (PDT) From: Ernest Erickson [email protected] To: [email protected] Subject: [amsat-bb] Re: Source for L-Band Preamplifier and Bias Tee?
Eric:
Try Mini-Circuits for bias Tees.
They are very high quality and very reasonable in price as well.
I believe the address is: www.mini-circuits.com
Give them a call, or Google them, you'll find them quite easily I am certain!
Hello,
I ran across some of their pages on preamplifiers but not bias tees. Thanks! I thought of them more for mixers, mmics and other parts.
Google is a blessing and a curse. I went through 10 pages of search results and came across papers on bias tees, companies that sell 400 GHz Bias Tees for over $1000. etc. Sometimes you need to figure out the right terms to get what you want.
Winradio came through and I am getting a replacement for my preamplifier. I am going to use only the bias tee on it. They have a diode to prevent backfeeding of power from the coaxial jack to the receiver port but leakage current will still cause voltage to build on the receive port with high impedance loads. My AOR AR5000 uses relays connected directly to the antenna port for switching and all the rf front ends use capacitors with no DC path to ground. I suspect that relay switching caused a spike. I gave feedback to WinRadio so they may correct the problem soon.
I am starting to use NEC and to make or modify L-Band antennas so I might as well order some stuff from mini-circuits and make my own preamplifiers as well. In 5 or 6 years I can become a RF Software Consultant. :)
73 Eric
Just a suggestion, use some PC Board material a chip cap and a 1/4 wave section of 141 hard line bypassed with a chip cap at the DC end for a bias tee? Use old surplus electronic equipment to salvage 50 ohm strip line, just cut it out, and add cap and connectors.
Art, KC6UQH ----- Original Message ----- From: "Ernest Erickson" [email protected] To: [email protected] Sent: Tuesday, July 10, 2007 10:31 PM Subject: [amsat-bb] Re: Source for L-Band Preamplifier and Bias Tee?
Eric:
Try Mini-Circuits for bias Tees.
They are very high quality and very reasonable in price as well.
I believe the address is: www.mini-circuits.com
Give them a call, or Google them, you'll find them quite easily I am certain!
73!
Ernest A. Erickson, KA9UCE Applied Electronic Communications, AEC 10711 East Verbina Lane Florence, AZ. 85232 520.723.0602 [email protected]
____________________________________________________________________________________Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.com/ _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Eric,
DEMI moved their whole operation to Florida. I was just in contact with Steve. Give them a little more time. They're very close to reopening.
73, Mike, N1JEZ "A closed mouth gathers no feet"
----- Original Message ----- From: "Eric A. Cottrell" [email protected] Subject: [amsat-bb] Source for L-Band Preamplifier and Bias Tee?
I tried searching for kits or construction articles for preamplifiers but only found some stuff overseas. Do I have to wait for DEM to reopen?
73 Eric
participants (5)
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Eric A. Cottrell -
Eric Cottrell
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Ernest Erickson -
kc6uqh -
Mike Seguin