Design Utilities Two utilities for calculating the numbers to be sent to AD9850/51/52 DDS chips used in beacon sources generating carrier / CW , WSJT data modes and RTTY, Use JT65CODE for generating the JT65 message data.

DDSBCN.EXE generates the codes needed when the DDS directly supplies the output RF, possibly via a multiplier.
Use REVDDS.EXE when the source forms part of a PLL such as those for GB3SCX and GB3SCF with the DDS operating 'backwards', generating the reference frequency while being clocked from the phase-locked VCXO.

HORN.ZIP Microwave Horn design. Adapted from G8AGN's software. Generates a graphical image of the finished horn and a cutting template for pyramidal horns. Runs in a Command prompt / DOS window.

WOUND.ZIP Coil Winding using Wheeler's equation. Specify inductance, former diameter, wire thickness. Command Prompt and Windows version

JUPUTILS.ZIP A few standalone utilites for driving the Jupiter TU-120D GPS module. Useful for changing the data output format between NMEA/Native Binary and Motorola Oncore. Also includes utilites to read and write binary data to the module.

FILTERS.ZIP A few utilities for generating filter designs. GENFILT.EXE calculates the order and component values for lumped element low/high and bandpass filters to Chebyshev or Butterworth responses. ELLIP.EXE contains a set of normalised elliptical designs and scales them to any cutoff frequency / design impedance. WGFILTER.EXE , derived from G3JVL's work is for waveguide iris coupled bandpass designs

SMITH.ZIP A simple to use Smith Chart calculator, written back in the good-old days of DOS (but still works perfectly in a Windoze Command Prompt, at least up to WinXP)

Use the cursor keys to move around a Smith chart, enter serial or parallel elements; devices with full or partial (S11 or S22) S-Parameters, change Zo, plot stability circles. Provides a continuous readoutof Z, Y and Rho plus distance moved around. All your actions are stored to a history file for later recall. There is some provision for reading S-Parameter files of a few rather old devices, and I think the .S2P format adopted is standard. No mouse support since at the time of writing, I didn't even know how to read the mouse under DOS. At least this has the advantage the S/W doesn't lock up under some command prompt settings (unlike a certain Geog suite!)
There's no documentation other than the help screen accessible from F1

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