KD5NWA:

  The transformer seems simple enough, especially with a fixed mixing 
frequency.  I found it being used with a vfo for 40 meters and it does look 
allot like a balun or transmission line transformer.  I got an email on a file 
to check out a twisted pair idea here today.

  Also, there is way to split a signal off into two for I Q with a resistor in 
one line, equal in resistance to either a capacitor or inductors reactance in 
the other line.  The reactance's phase shift voltage and current by 90 degrees 
in the one line.  It appear that a single capacitor or coil in the other line 
will shift ther pahse 90 degrees but only if the frequency of operatiuon is 
fixed or limited.

Dan


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