Our option bypass headers are ideal for trou­ble­shoot­ing and tin­ker­ing.  These devices sim­pli­fy the task of re­con­fig­ur­ing the Elecraft® K2 to op­er­ate up­on re­mov­al of their as­so­ci­at­ed option.  Con­verse­ly, they al­so make it pos­si­ble to build a K2 that’s “Option Ready” from the out­set; when used in con­junc­tion with our re­work-free as­sem­bly method.  [learn more]  [place an order]

We al­so of­fer “Du­pli­cate K2 PCB Parts” kits for build­ing a stock K2.  These parts en­a­ble you to ful­ly pop­u­late the K2’s three main cir­cuit boards right from the start.  This ap­proach yields a ra­dio that’s much easier to upgrade with op­tions, and potentially more re­li­a­ble.

These kits al­so have the parts you’ll need to add a sec­ond-hand op­tion to a “tra­di­tion­al” K2, (i.e. one that isn’t “Op­tion Ready”).  [learn more]  [place an order]

Our K2 internal mic adaptor is an en­gi­neer­ing marvel.  Check out this PCB scan and this x-ray ren­der­ing to see for your­self.  Once in­stalled, this clever de­vice can be easily ac­cessed by re­mov­ing the K2’s left side pan­el.  And re­wir­ing the mic jack’s pin-out and/or ex­ter­nal bi­as re­sis­tor, is a sim­ple mat­ter of re­arrang­ing jumpers.

A PDF user’s guide shows how to con­fig­ure the adap­tor for 66 pop­u­lar 8-pin Foster mi­cro­phones.  It in­cludes a col­or-cod­ed sche­mat­ic diagram, and a de­tailed de­scrip­tion of the sur­pris­ing­ly flex­i­ble external bias circuit.

The kit in­cludes a self-ad­he­sive decal for handy ref­er­ence.  The 30 mi­cro-inch gold-plat­ed con­tacts are ra­ted for a min­i­mum of 100 jump­er in­ser­tion and re­mov­al cy­cles; suf­fi­cient to en­sure years of re­li­a­ble op­er­a­tion un­der nor­mal use.  [learn more]  [place an order]