This discussion of good L meters brings up an issue regarding Elecraft rigs that probably bears repeating.
When building an Elecraft kit, do *not* try to trim the inductances to meet the value shown in the manual. Simply wind the toroids with exactly the number of turns called for and position the wires as shown in the illustrations. It doesn't hurt to measure the inductance if you want to, but don't panic if the values don't match the manual and don't try to adjust the coil to make them match. The numbers in the manuals are simply nominal values and may not be the optimum value for your particular rig. Where the actual value is critical, it is adjusted as needed to make the circuit behave properly, not by adjusting the coil to meet some predetermined inductance. The PLL reference oscillator coil in the K2 is one such example, where you may adjust the coil slightly to obtain the proper voltage range. The KX1 output filter coils are another, where you may adjust the position of the turns for proper output on all bands. Where such tests are not a part of the build procedure, the inductance is not that critical. Just be sure to wind the coil exactly as shown. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [email protected] 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
