Technical Notes    
Updated on 1Aug09  


Click on this figure to move down to the Spectrum Analyzer related material.

The following notes are not always in chronological order.   Also, some of the PDF documents are being shifted to HTML files, which makes them more easily viewed with a mobile platform.  

Click on the subject lines below to see the related file.

1Aug09                Motional_Inductance_Calculation_from_Reactance_Slope    (html)
28July09              Comparing Quartz Crystal Measurement Methods      (html)
26June09             ATermination Insensitive Amplifier for Bidirectional Transceivers (with k3nhi)     (html)
19June09             Transistor Models and the Feedback Amplifier.     (html)
24Feb09               Experiments with a Simple Low Pass Filter      (html)  
9 Dec 08               Mixed Form LC Bandpass Filter      
13Oct08               Simple LC Bandpass Filters using Air Core Coils  
30June08              Field Day 2008                                                      
19Apr09               Transformer Coupled LC Bandpass Filters    
29Jan08                Experiments with Singly Balanced Mixers        
21Jan08                Oscilloscope AB Time Bases -- a Tutorial.      
13Jan08                Free SMT Parts Still Available from KE6F.    
2Dec07                 Printed Circuit Board Info and Errata for the Hybrid Cascode AGC/IF Amplifier
                                   (from QST, December, 2007)                     
16Nov07              An Oscillator Scheme for Quartz Crystal Characterization      
17Oct 07              Adding a Q-Multiplier to a Zero Power Receiver       
8Dec08                 Experiments with Coils and Q-Measurement    
25Aug07               More on the EMRFD "First Transmitter" from Chapter 1.      
May, 2007            Pads and Feedback Amplifiers
Dec, 2006             Local Oscillator Experiments  
June, 2005            Field Day 05    
Sept, 2007            Our Books      
Dec, 2005             Problems with DOS programs running in XP and a solution.      
May, 2007            A JFET Tutorial            
July, 2006              Gamma, Return Loss, and VSWR                
June, 2008            A Simple Method for Shrinking Picture (and other file) Size for EMail and Web Use             
July, 2007             Portable Operations, /7        
April, 2007           A Cheap Rotor System          
April, 2007           Scattering Parameter Extraction in SPICE                
Jan, 2007             Mountaineer Transceivers, Old and New              
Jan, 2007             Notes on the Mark-II Universal QRP Transmitter              
Dec, 2007            The dB versus the dBm   (Updated)              
June, 2001            Routing Coax through a Metal Wall              
March, 2007         Breadboarding:  The Good, the Bad, and the Ugly              
June, 2005            Wireless Pioneers, W1DX and W1FB              
April, 2003            EMRFD Abstract                
Jan, 2007              Designing High Order LC Bandpass Filters from EMRFD            
Oct, 2001             IRFD Update (An oscillator design issue.)      
Aug, 2007             The Incidental Double Tuned Circuit -- A Transceiver Anomaly.
July, 2002              A High Q VHF Triple Tuned Filter                
June, 2004             A Simple VHF Bandpass Filter Topology                    
Sept, 2007             A 50 MHz Low Noise Amplifier with a SMT Dual Gate MOSFET      
Aug, 2007              An Antenna Support for Semi-Portable Applications
June, 2007              Power Meter Updates (regarding June 2001 QST paper with W7PUA)
 
 
         Spectrum Analyzer Information  

The following items relate to the QST Spectrum Analyzer (Aug and Sept, 1998) that K7TAU and I described.    
Early Spectrum Analyzer Update (June 2000)   Includes data on crystal filters.
Recent Spectrum Analyzer Updates    (Nov08)       
RCA Plugs and Sockets  (Dec 02, Aug 06)
Tracking Generator Modifications
   (Jan 07)
SA-TG Update 13May9.pdf        (13May09)