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Topics - KB8OYR

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Technical Central / interstage transformers
« on: August 20, 2013, 08:02:55 PM »
The ARRL Handbook cites many examples of broadband transformers to transfer power from one stage to the succeeding one.  It is stressed that the primary winding must present 4 times the inductive reactance of the preceding stage.  But my question is:  must the secondary winding also present 4 times the inductive reactance of the base impedance of the following stage or the ACTUAL inductive reactance of the base impedance of the following stage?

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Technical Central / rf choke values
« on: August 20, 2013, 07:39:22 PM »
Is there a problem with substituting a larger value rf choke?  For instance:  if the ARRL handbook calls for a 30 micro henry choke for a class C amp on 30 meters and I wind a....say...200 micro henry one in it's stead, would it matter?

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