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Titan7,
The link I posted above has some information pertaining to the "Holder Type" that Bomar asked about.
Several types are: HC18/U, HC6/U and HC25/U. The pictures and dimensions in that link may help you identify your particular type.

Typical Load Capacitance of crystals for CB radios are 32pF or 20pF. The smaller the load capacitance, the more the external circuitry affects the shift of the crystal. I.e. for a SSB carrier oscillator (where a clarifier circuit may be tied to the crystal) you would want a 20pF load capacitance.

Accuracy may be another specification that you may be asked about. Obviously the higher the accuracy, the higher the price. I think typically you would need .005% accuracy. You may get by with less accuracy dependent on the amount of shift provided by your trimmer capacitors.

Good Luck
73's
David

<blockquote data-quote="Dmans" data-source="post: 643656" data-attributes="member: 49046">Titan7,The link I posted above has some information pertaining to the &quot;Holder Type&quot; that Bomar asked about.Several types are: HC18/U, HC6/U and HC25/U. The pictures and dimensions in that link may help you identify your particular type.Typical Load Capacitance of crystals for CB radios are 32pF or 20pF. The smaller the load capacitance, the more the external circuitry affects the shift of the crystal. I.e. for a SSB carrier oscillator (where a clarifier circuit may be tied to the crystal) you would want a 20pF load capacitance.Accuracy may be another specification that you may be asked about. Obviously the higher the accuracy, the higher the price. I think typically you would need .005% accuracy. You may get by with less accuracy dependent on the amount of shift provided by your trimmer capacitors.Good Luck73&#039;sDavid</blockquote>

[QUOTE="Dmans, post: 643656, member: 49046"] Titan7, The link I posted above has some information pertaining to the "Holder Type" that Bomar asked about. Several types are: HC18/U, HC6/U and HC25/U. The pictures and dimensions in that link may help you identify your particular type. Typical Load Capacitance of crystals for CB radios are 32pF or 20pF. The smaller the load capacitance, the more the external circuitry affects the shift of the crystal. I.e. for a SSB carrier oscillator (where a clarifier circuit may be tied to the crystal) you would want a 20pF load capacitance. Accuracy may be another specification that you may be asked about. Obviously the higher the accuracy, the higher the price. I think typically you would need .005% accuracy. You may get by with less accuracy dependent on the amount of shift provided by your trimmer capacitors. Good Luck 73's David [/QUOTE]

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