I agree the information is hard to find. The Web site assumes you came there because you already know what the product is. However, I found good information in the online manual, which I'll quote here:
Introduction Every Elecraft K2 internal option kit includes some parts that need to be installed in the K2 itself. Most options also require the removal or in rare cases the replacement of some of the existing components in the K2. With a few exceptions, the subsequent removal of an option requires the restoration of some if not all of the altered circuitry back to its original state. Instead of reworking its PCBs, an easier way to restore the K2 is to do so "off board". Using this approach, headers that are wired with the necessary "restoration" circuitry are inserted into the same jacks where the option module would be if it were installed. Getting the Most Out of Un-Modules Un-modules are most useful when incorporated into the K2 during initial assembly. This requires that you have the extra "K2 parts" on hand that are included with each of the options. (For those options that you will be buying later you will need to purchase duplicates of these parts in advance.) The un-modules would then remain installed until the corresponding internal option module is purchased and/or built. In this role, un-modules eliminate the need for any subsequent disassembly of, and rework to the base K2. Other than the insertion of the completed option and any required realignment, there would be no need to go back inside. The elimination of later rework ought to be especially desirable to builders-for-hire (and those who rely on them) as it offers the possibility of adding many of the options one-by-one, without having to part with the radio each time, while someone else performs the upgrade. Even if all of the internal options are never installed by the original owner, the use of un-modules should still be a selling point adding to a K2's resale value (if you should ever be willing to part with it). Un-modules are also useful to the owner of an existing K2 because they make it possible to perform all of the upgrades to the RF and Control boards "all at once", without having to install any of the actual modules. The rework needed for the K2 options that don't require an un-module (KIO2, KPA-100, and KBT2) can/should also be done as part of this process. A Few Words About Rework Eliminating a rework does more than just save you time. All rework reduces the quality and reliability of a circuit board. This applies even when the rework is done properly by professional assembly technicians using the best equipment. Clearly this motivation for the use of un-modules isn't applicable to an existing K2. However, it is a compelling justification for anyone contemplating a new K2 build. Hope this helps. Craig NZ0R K1 #1966 K2 #4941 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Harris Sent: Wednesday, June 22, 2005 7:24 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Our Un-Module Header PCB Kit Product Launching Gosh guys....looked at the link and came away scratching my head! If you build a better mouse trap you probably need to tell everyone that is is a better mouse trap. No where did I find anything that told me what value this is going to add to me in exhange for my hard earned bucks. (i.e. marketing 101) 73, Jim, AB0Uk K2 sn 4787 ____________________________________________________ Yahoo! Sports Rekindle the Rivalries. Sign up for Fantasy Football http://football.fantasysports.yahoo.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
