[Elecraft] 4 mHz and C22 bandspread mod

[A. Hansen]

Hi Ken,

----- Original Message [elided]----- 
From: "KEN BROWN" <elecraftk2@juno.com>
...
Subject: [Elecraft] 4 mHz and C22 bandspread mod


> I need to compare notes with anyone who has done the
> bandspread mod to C22 and X2 4 mHz crystal (C21 replacement).


I made the change to K2 #3302 using a pair of 10pF, type T2 (N470 equivalent) 
from my junk  box. These caps have about half the compensation of the N750 type so 
they may not not be quite as good, but temperature compensation is better than the NP0 
type provides. I found that the revised bandspread of C22 makes adjustment a breeze 
without the "skipping" that plagued my previous calibration attempts, and the range is 
nearly perfectly centered. 

73, Gus /KB0YH