Monthly Archives: June 2013

Winding Your Own Inductor (From 1997 QST)

Posted on June 18, 2013 by jgerbs

Building antenna tuners and amplifiers often requires you to roll your own inductor.  This takes you through the steps.  Wind your own Inductor

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Calculate the Impedance of a Length of Wire

Posted on June 16, 2013 by jgerbs

This site has a calculator to determine the impedance of  length of wire.  Very helpful http://www.chemandy.com/calculators/round-wire-impedance-calculator.htm

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Computer ATX Power Supply to 12V 12 Amp

Posted on June 15, 2013 by jgerbs

ATX power supplies are easy to convert to a 12 volt supply for a radio.  ATX supplies typically provide 10 to 12 Amps output current. To convert the supply take several of the yellow wires (12 Volt lines) and tie … Continue reading →

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Foritgate OSPF Over a VPN Tunnel

Posted on June 15, 2013 by jgerbs

After working with Tech support, I found this useful article that could have saved me the support call. Dynamic Routing Protocols OSPF over IPSEC VPNs I can’t remember the site I found this info, but will post it at a … Continue reading →

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FSMO Roles in Active Directory (Flexible Master Operations)

Posted on June 15, 2013 by jgerbs

This data in this PDF has bee copied from http://www.petri.co.il/fsmo-roles-in-server-2008-active-directory.htm. This link is a cut and paste PDF form data at petri’s site, FSMO Roles

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Vender for RF Kits and Parts – Flying Pig Rig V2

Posted on June 15, 2013 by jgerbs

Kits and Parts has all sorts of semiconductors and toroid’s.  They also have rf kits that are useful for building a radios.  A fairly new product is their 5 Watt CU Transceiver for $42, it is call “The Flying Pig … Continue reading →

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End Fed Antenns EARC FED 6-4

Posted on June 15, 2013 by jgerbs

I found this end fed 6 – 40 meters and picked one up. I have saved the PDF on my site and you can view it here: Endfed6_40 Click here for the link to the club selling the antenna  http://earchi.org/ Click … Continue reading →

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