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Messages - KB8OYR

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Technical Central / Re: interstage transformers
« on: September 02, 2013, 12:47:14 PM »
By now I'm embarrassed that I've enquired and I'm sorry for your time collectively.  Like I learned back in Sunday School.   "You're welcome as long as you don't ask questions, young man."

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Technical Central / Re: rf choke values
« on: August 22, 2013, 08:09:53 PM »
Kind of you to say, DG and I'm your yeoman in this pursuit and keep looking for the answer by trial and error; usually the latter.  In the off chance I find something, I'll share it with the group. 


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Technical Central / Re: rf choke values
« on: August 21, 2013, 06:51:25 PM »
Thank you for the response.  My aim is use up some of my (non-spec) junk-box ferrite torroids as chokes so I can save my good ones (with specs) for design purposes.  I don't doubt your E.E. admonitions, but, as tired as I am at the end of my work day...   How about I just wind a couple of them up and try one.  If it burns the house down, I'll try the other.

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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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