Author Archives: jgerbs

Winding Your Own Inductor (From 1997 QST)

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

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

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

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)

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

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

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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Fortigate IPSec Trouble Shooting

Here are the basic commands to trouble shoot IPSec on a Fortigate firewall. Use diag debug en Diag vpn ike filt Diag debug app ike -1 Diag debug reset SA is on phase 1 and phase 2 but typically refered … Continue reading

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Printing from a Web Page

There is a lot of useful information on the web, but sometimes it is difficult to print what you want without having to print a lot of useless information.  This is a great free utility to let you choose what … Continue reading

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Working different versions of Windows servers and workstations, I find running these Control Panel commands from the Start button very helpful in saving time versus navigating the GUI.  Control Panel Tool                   … Continue reading

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