[Central-Electronics] 10B Mod

[k7fm]

Hi Jim:

If you are looking for an even easier way to temperature compensate an 
oscillator, you could always use the method used by Hallicrafters in the 
HT-32.  In that circuit, a differential capacitor is used, with one side 
tied to a NP0 cap while the other side is tied to a N1500 cap (or something 
like that).  Then, you can change the compensation to anything between 
nothing and -1500 ppm.  Simply turn the screwdriver adjust capacitor until 
drift stops.

73,  Colin  K7FM