Counting matching models…
General After reading an interesting artikel about Quadrifilar Helical Antennas I got inspired and wanted to print one The creation of this antenna described in detail at QFA Antenna . Models and simulations are available on GitHub:…
This is print-in-place, the pockets needs to be colored before printing. Add both left and right piece and print as one object with two parts. If you want other text, please use attached FreeCAD ‘FCStd’ file and update text, then export…
Description Useful of you need to keep track on how many turns you made on a shaft or want to remember setting to quickly tune back to previous value. Knob is directly connected to shaft and follows 1:1. Counter tracks knob revolutions…
General This is a quadrifilar antenna for 868/915 MHz with mount and radome. Antenna has been succesfully deployed for TinyGS: SA0PEJ_900 There is a 70cm version of this antenna available. qfa-qfh-antenna-70cm-band Printing and building…
General To keep the tiny SMA standards in order and because it is difficult to read the tiny text on them, I made this holder with big text for attenuation. Using classic radio panel font (DINMittelschriftStd): OP - Open SH - Short 50 -…
Intro This is a Geneva drive that can change size, thickness and #steps by changing spreadsheet. The inspiration comes from both Kens12 and from MangoJelly - Thank you !! Design Open model in FreeCAD then update yellow cells in…
Radome 70cm QFE antenna This radome is made for the 70cm quadrifilar antenna . Can be seen here as TinyGS station covering from Mediterranean in south up to Svalbard in north from my balcony in Sweden: SA0PEJ_70cm Printing and building…
General To keep the tiny SMA attenuators in order and because it is difficult to read the tiny text on them, I made this holder with big text for attenuation 1 - 1 dB 2 - 2 dB 3 - 3 dB 6 - 6 dB 10 - 10 dB 20 - 20 dB 6D - 6 dB with DC…
Introduction The antenna design is described here: 3d-print-j-pole . Build Print the two parts with support Glue parts together Dress with 10mm copper foil as in photos Connect coaxial cable 17 mm up from bottom metal Make 3 turns on…
Radio knob that fits to M10 threaded shaft or 8.5 mm shaft. Print with 80% infill and support. If you print upside down on an engineering plate you get nicer surface on top. Thread with M10 threading tool Cut a piece of flourescent 1.75…
General Created this helical antenna for L-band and to detect OH radiation from supernova CAS A . can be used on balcony without reflector. Antenna center frequency is 1665 MHz, bandwidth is around 1550–1780 MHz. Printed in sections of 4…
General Variable inductance based on two spherical inductors that combine or cancel out depending on set angle. Build Build instruction is here: 3D print and Build Variometer Version V1 2025-03-02 First version
General Capsules for protecting N and UHF connectors. N(Male) N(Female) UHF(Male) - PL259 UHF(Female) - SO239 Connector type is written on side and gender on end. Printing Print with PLA or elastic TPA. Attached 3MF file has been prepared…
Introduction (Later improved model than this is here : Racetrack Tuner ) This is a capacitive coupler for tuning Short Loop Antennas (STL). It is an evolution from the ‘Patterson Match’ aka military loop from 1967, this is my fifth…
General Model and some print files for receiving satellite signal in L-Band at 1700 MHz and one Inmarsat at 1540 MHz. Other frequencies can be generated. Model is parametric and other frequencies can be generated directly in FreeCAD:…
Introduction Knob with adjustable slipping clutch to avoid damage at endpoints. When reaching endpoint it can be necessary to avoid damage on your design by letting knob slip at torque set by using the ClutchScrew. Tools T27 Torx wrench…
Introduction The racetrack tuner is a capacitive coupler for short transmitting loop antennas. The name is refering to its racetrack form. Racetrack Circus Maximus in Rome - maybe I should call it ’Maximus Tuner’ :-) For use by certified…
Color front panel to make text fluorescent on front panel. Text is made in classic frontpanel style with DIN17 font for professional look and feel. Add desired colour in the letter pockets before printing if your printer can handle…
General Three different mounting alternatives for Racetrack Tuner . Features Add structural strength to Tuner. Mounting alternatives Circular (Broomstick ) Rectangular (Wood) Frontpanel, protecting the knobs Build Print 2 pcs screws with…
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