I would also like to point out that those interested in installing Gary and Ken's K2 PCB parts kits can very easily create their own "un-modules" on perf-board. Many of them consist of just a wire between two pins of the header - the KNB2 un-module is the most complex because it needs to be a -5 dB pad (3 resistors) - the KSB2 needs a .001 uF capacitor and the J15 header needs a 4.7 pF capacitor. Just review the K2 schematics and the information on the un-pcb website and you should be able to construct your own un-modules.
I use several of these "homebrew un-modules" when doing repairs. The Un-PCB modules are convenient for those wanting to assemble the K2 so options can be added in the future, but I make my own in a smaller profile so I can probe greater areas of the RF Board with them installed. Most of my modules are only a bit wider than the header itself, but if your purposes are different than mine, you can vary from my methods. A note of caution - the headers for the KAF2/KDSP2 board on the K2 Control Board are not 0.10 inch center to center between the two headers - that fact makes it difficult to use regular perfboard when constructing an Un-module for these headers - the alternative is to use two bent wires across the headers. 73, Don W3FPR Gary Hvizdak wrote: > Nearly five years after Ken first announced our intention to offer a PCB > based K2 un-module headers kit, as of today we are no longer offering this > popular aftermarket accessory. We will continue to offer our K2 Internal > Mic Adaptor (IMA) kit for another year or two, depending on how quickly our > inventory of circuit boards is depleted. Likewise, we will continue to > maintain our website and documentation for at least that long. > > For the moment we are still offering most of our duplicate K2 PCB parts > kits, although they will also be phased out once our current inventory is > gone. Beyond enabling you to build a bare K2 so the options can be added > more easily, these parts are also required to add a used option to a K2 that > wasn't originally built "option ready". > > 73, > Gary KI4GGX > webmaster http://www.unpcbs.com/ > > P.S. Henceforth, if you want to build a K2 using our "option ready" > assembly method, we suggest you post a WTB message on the Reflector, in > order to locate a used set of our option bypass headers. For more details, > please see http://www.unpcbs.com/faq/#legacy > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
