QRP HomeBuilder Software


Discussion

Presented on this page is software for use in designing and building your QRP and homebrew projects. This 32-bit software is for users of Microsoft Windows 95, 98 and NT 4.0-5.0 (tm) operating systems. Each program is designed to be small and self-sufficient and in keeping with that they have minimal graphics and "flash". Help files are simple text files embedded within or included with the applications and should cover most questions, however please email us if you have any problems or discover any bugs. The applications do not make entrees into the registry unless specified and removal of a given application maybe done by simply deleting the main file. All software offered is freeware. Note that bug fixes if they exist for an application will be highlighted in red. Check the current release date and compare it against the date in the About Box of the application you have previously downloaded. You can then ensure that you have the current version.

Disclaimer

THE QRP HOMEBUILDER SOFTWARE OFFERED HEREIN ("THE SOFTWARE") DOES NOT COME WITH ANY WARRANTY, EXPRESS OR IMPLIED. IF YOU MAKE USE OF THE SOFTWARE, PLEASE BE AWARE THAT YOU DO SO AT YOUR OWN RISK. NEITHER THE AUTHORS OF THE SOFTWARE AT JENNA DESIGN NOR ANY OTHER PARTY WILL ACCEPT RESPONSIBILITY FOR ANY OCURRING OR UNFORESEEN CONSEQUENCES OR DAMAGES THAT ARISE AS A RESULT OF THE USE OR MISUSE OF THE SOFTWARE.


Technical Info and Distribution

The QRP HomeBuilder applications are written in C++ for speed and compactness. Apps will specified as GUI ( graphical user interface ) or 32-bit console based ( DOS look ). Anyone may display or distribute these applications via website or diskette providing that they do not charge for the program(s). A small charge for the diskette media is permitted, however CD ROM distribution for profit is not permitted except by express permission via email agreement.

mailto:qrp@qrp.pops.net?Subject=QRPHB Software:

QRP-RELATED APPLICATIONS FOR DOWNLOADING


CoilBuilder_99

CoilBuilder_99 is a powdered iron inductor winding application.
Style: GUI , File size: 90K, zipped 44K.
Enter desired inductance, select core size and mix and press the Calculate button to determine the correct number of windings for your inductor. Data is also given showing, core color, permeability, frequency range, AL value and maximum number of turns versus wire guage for the chosen core size. Encompasses 12 different core sizes and 8 different mixes of powdered iron. Calculated results can be stored on a disk file or printed out.
Bug Fixes: Some missing AL values for # 7 material added April 24/99. K6WHP's superior version is linked below.

Current Version is 4/24/99

Download the CB99.zip file




PI Filter Designer





PI Filter Designer is a simple 3 element 50 ohm input and output impedance pi filter designing application.
Style: GUI , File size: 47K , zipped 22K.
This program allows the user to design simple lowpass filters by selecting from a variety of standard capacitor values either empirically or to suit what you have on hand. The filter 3 dB cutoff frequency and required L1 inductance are automatically calculated and displayed. In addition, the user may select an additional capacitor value to put in parallel with both caps C1 and C2. In this app XL = XC = 50 ohms impedance. No other impedances can be calculated with this program.

Current Version is 1/14/99

Download the pifilter.zip file


Cap Coder

CapCoder gives the capacitance in microfarads, nanofarads and picofarads and tolerance of any capacitor code entered into its input section. Example : 104J.
This app uses numeric spin-buttons and a combobox so that no typing is required for data entry.
Style: GUI , File size: 48K , zipped 22K.
Bug Fixes : A nanofarad conversion error was corrected July 2, 1999.

Current Version is 07/02/99

Download the capcoder.zip file


Resistor Coder

Resistor Coder gives the resistance in ohms of any resistor color code entered into its input section. Four or five band resistors can be accomodated by this program.
Style: GUI , File size: 58K , zipped 27K.
This app uses drop-down comboboxes so that no typing is required for data entry. Results maybe saved to a disk file or directly printed.

Current Version is 1/16/99

Download the resistor coder.zip file


Ferrite

Ferrite is used to calculate the number of turns required on toroidal ferrite cores to achieve the desired millihenry-value inductance. 15 different ferrite toroids are included in this application. This program will calculate the winding data for an inductance range of 0.001 to 27 millihenries.
Style: CONSOLE , File size: 64K , zipped 31K.
Bug Fixes: Thanks to PA3CKR for the bug report ; fixed Jan 19/99.

Current Version is 1/19/99

Download the ferrite.zip file


Universal Diplexer



Universal Diplexer calculates the inductance and capacitance values for a Bridge-Tee diplexer based upon a chosen superhet receiver intermediate frequency. The diplexer is the Joe Reisert, W1JR popularized design discussed under Diplexer Topics on this web site. The user inputs an IF and presses the Calculate button to have the capacitor and inductor values given in pF and uH respectively. The diplexer schematic is included in the application.
Note that the this is for the Q = 1 version of the Bridge-Tee Diplexer.
Style: GUI , File size: 49K , zipped 22K.

Current Version is 1/19/99

Download the diplexer.zip file


HF Dipole

A very basic program for calculating the length of each leg of a 1/2 wave wire dipole antenna. Program good for 1 - 500 MHz, although intended for MF - HF useage. This app does nothing more than the standard 468/freq (MHz) type calculations. It was written for DOS many years ago and ported to Windows. The output shows the 1/2 wavelength and 1/4 wavelength design wire length in feet and meters. This app is probably of no help to experienced antenna designers.
Style: GUI , File size: 46K , zipped 22K.
Update : Minor improvements made Feb 9, 1999

Current Version is 2/9/99

Download the hf_dipole.zip file


Resonator



This application calculates the inductor and capacitor values for the tank circuit of a simple bipolar transistor RF amp. The basic schematic is shown above. Enter the center frequency plus the inductive/capacitive reactance you desire and press the Calculate button to calculate the necessary inductance and capacitance for L and C respectively.
Style: GUI , File size: 50K , zipped 21K.

Current Version is 1/23/99

Download the resonator.zip file


NPN DC-BIAS



This application calculates the various voltages and currents of a simple voltage divider bias NPN bipolar transistor amp. The following is calculated : IB, IC, IE, VE, VB, VC, VCE and detection of Saturation or Cutoff. The user can alter the VCC, VBE, transistor beta and any of four resistor values R1, R2, RC and RE by picking the transistor value from a standard-value resistor table or manually entering the value.
This app is in final BETA. The schematic above illustrates some of the voltage measuring points on the transistor schematic.
Style: GUI , File size: 73K , zipped 32K.

Current Version is (BETA)16/04/99

Download the nbias.zip file







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