Thomcast-2304.html


We are always looking for articles suited for this page. All topics covering technical subjects, microwave hints 'n' kinks, etc., would be appropriate. Inputs and suggestions are solicited!

Articles and Tutorials

   100 Watts on 2304 with a Thomcast MDS Transmitter
   Modification of "600W" Motorola 900MHz PA
   Maps of 5th call area states showing counties & grids
   Build a 432MHz beacon!
   Modification of 150 & 300 W Motorola 900MHz PAs
   An Alford slot antenna which works - de W5OE
   Taking the mystery out of the Alford slot - de W5OE
   LSCX:  MICROWAVE ALPHABET SOUP - de EDN
   Converting Chan'l Master 11.7-12.2 GHz LNB
   Protecting the Feedthru Capacitor during Conversion
   Print a compass rose. Use browser "back" to return.
   Reflocking DEMI microwave xverters - de N3FTI (pdf)
   Reflocking DEMI microwave xverters - de KD7TS
   Thoughts on generators de K8JRO
   13cm on a Budget - de K5LLL
   Mod'ing mwave Assoc's "WHITE BOX" - de G3PHO
   Heatsink theory and calculations
   Mod the Radio Shack xcvr for xvrtr-IF use - de K5VH
   JT44 & JT65 info + the WSJT software - de K1JT
   NOAA Satellite & Info Svc - Mag declin'n calculator
   Basic Microwave design theory: GOOD STUFF!
   Minicircuits Application Notes
   Outline of talk on Run 'n' Gun Roving de ND2X
   Concept paper on 3-band MW transceiver; 242KB pdf - de Nx1N
   Slides from talk on 3-band MW transceiver; 218KB pdf - de Nx1N
   Use standard N connectors on LMR 400 & 9813 Coax - de K5JL
   The relationship between temperature & noise figure
   Taking the mystery out of return loss.
   Figures & drawings for ring hybrid combiner/splitters
   W5OE PPT: building a ring-hybrid splitter/combiner
   Shield Effectiveness of Perforated Metals (Hendrick Mfg Co)
   Detail of Maidenhead subgrid designators & dimensions
   The Toshiba Linear Microwave PA on 3.4GHz de W3HMS
   The Toshiba Linear Microwave PA on 3.4GHz de K5VH
   Make your own transformer
   Waveguide types (IEC, EIA, British & JAN) & antennas
   PDF with all documentation & drawings - de WA6CGR

Javascript Calculators

Power Level Calculations

  1. Adding Power Levels

  2. Power Level Changes

  3. Gain/Attenuation from change in power level

Antenna System and Transmission Line Calculations

  4. Antenna System Parameter Analyzer

  5. Physical length of coax for a given electrical length

  6. Coaxial Cable "cutoff" Frequency

  7. Parabolic Reflector focal length and f/D

  8. Rectangular waveguide cutoff frequency and attenuation

Path Loss and Field Strength Calculations

  9. EME Path Loss

10. Free Space Path Loss

11. Received Signal Level & Field Strengths

Temperature and Heat Calculations

12. Noise Figure and Temperature

13. Heat generated due to Insertion Loss

Spreadsheet Calculator
(requires microsoft Excel)

Slotted waveguide design

Miscellaneous Data

Receive System Design Formulae


The Dick Knadle K2RIW Corner
http://consult-li.com/listings/RKnadle.htm

   Directional Couplers: 10.368 GHZ feed tuning
   Coax Z, Losses, and the Maligning of UHF Connectors
   A discussion of Parabolic Dish Antenna Efficiency
   A discussion of Antenna Scattering Area
   Notes on converting Ku band LNBs for 3cM use
   "Periscope Ant. NF Degradation?" and Ant. Noise Temp
   Calculating and Correcting Radome Reflections
   A discussion of RF biohazards of non-ionizing radiation
   Waveguide Dummyload Information
   Inexpensive WR-42 Home-Brew Attenuators.
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