Just FYI, Tripp Lite says their DB9R uses avalanche diodes. From Wikipedia:
"A common application is protecting electronic circuits <http://en.wikipedia.org/wiki/Electronic_circuit> against damaging high voltages <http://en.wikipedia.org/wiki/Overvoltage>. The avalanche diode is connected to the circuit so that it is reverse-biased. In other words, its cathode <http://en.wikipedia.org/wiki/Cathode> is positive with respect to its anode <http://en.wikipedia.org/wiki/Anode>. In this configuration, the diode is non-conducting and does not interfere with the circuit. If the voltage increases beyond the design limit, the diode suffers avalanche breakdown <http://en.wikipedia.org/wiki/Avalanche_breakdown>, causing the harmful voltage to be conducted to earth. When used in this fashion they are often referred to as clamper diodes <http://en.wikipedia.org/w/index.php?title=Clamper_diodes&action=edit&redlink=1> or Transient voltage suppression diode <http://en.wikipedia.org/wiki/Transient_voltage_suppression_diode> because they "clamp" the maximum voltage to a predetermined level. Avalanche diodes are normally specified for this role by their clamping voltage /V/_BR and the maximum size of transient they can absorb, specified by either energy (in joules <http://en.wikipedia.org/wiki/Joule>) or /i/^2 /t/. Avalanche breakdown is not destructive, as long as the diode is not allowed to overheat." 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at telnet.reversebeacon.net, port 7000 On 8/12/2010 8:58 AM, Jim McDonald wrote: > I moved the internet unit off my tower and made other improvements, > including adding a Tripp-Lite DB9 surge protector (MOVs, I assume) at the > K3. My new computer is connected to the router via RF instead of Ethernet > even though it's only a few feet away. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
