Turnstile Antenna Musings

https://en.wikipedia.org/wiki/Turnstile_antenna

2 dipoles offset at 90 deg: https://www.antenna-theory.com/antennas/dipole.php

http://www.west.net/~jay/turnstile.html

https://web.archive.org/web/20130728092252/http://w4rnl.net46.net/turns.html

http://www.antentop.org/w4rnl.001/turns.html

add::

https://www.antenna-theory.com/antennas/halfwave.php

1/4 wave antenna:

Make a 1/4 Wavelength Antenna + Calculations
https://www.youtube.com/watch?v=haizSAYquUg

How to Build: Ham Radio 2 Meter Quarter Wave Antenna - K7AGE https://www.youtube.com/watch?v=HkmD3Sgz7Q0

https://www.everythingrf.com/rf-calculators/parabolic-reflector-antenna-gain
https://www.bu.edu.eg/portal/uploads/Engineering,%20Shoubra/Electrical%20Engineering/833/crs-14407/Files/Reflector%20Antennas%20-%20Part%201.pdf
https://www.reddit.com/r/RTLSDR/comments/a1ee6i/a_few_questions_about_turnstile_reflectors_for_a/

#359​ How to properly use a NanoVNA V2 Vector Network Analyzer & Smith Chart (Tutorial)  --- Andreas Spiess   (includes demo kit -- green board)
https://www.youtube.com/watch?v=_pjcEKQY_Tk

https://en.wikipedia.org/wiki/American_wire_gauge
https://www.youtube.com/watch?v=HkmD3Sgz7Q0&t=142s

about antennas:

https://www.jpole-antenna.com/2012/07/03/why-build-antennas-out-of-copper-and-not-aluminum-or-stainless-steel/
https://www.eeweb.com/lets-build-the-yagi-antenna/

Using the NanoVNA to Measure Antenna SWR and Resonance --

joe smith
https://www.youtube.com/watch?v=_drx7ORUDWI

Which NanoVNA Should I buy? - TheSmokinApe
https://www.youtube.com/watch?v=xNNtM_mUAqc


https://www.youtube.com/watch?v=uy4opULxcdg

Broadband RF Amplifier/ Class A RF Amplifier

https://www.youtube.com/watch?v=Drwt9ivQLYY

SBB6950Z 5Mhz-6000MHZ Amplification Transistor//////////////////

https://www.youtube.com/watch?v=dVa9YZ0-24E


https://www.febon.net/products/usb-dtmb-atsc-dvb-t-tx-modulator-generator-transmission

https://febon.blogspot.com/2015/03/power-amplifier-pa-module-for-fpv-first.html

https://www.youtube.com/watch?v=cWDHQppfR38
IMSAI Guy - #581​ Digital Programmable RF Attenuator

https://www.open-electronics.org/hmc624lp4e-rf-signal-attenuator-controlled-by-arduino/

https://hackaday.com/2018/07/21/digital-attenuator-goes-from-manual-to-arduino-control/

http://www.kerrywong.com/2018/07/15/controlling-an-hmc624lp4e-rf-attenuator-using-arduino/

DIY digital RF attenuator
https://www.youtube.com/watch?app=desktop&v=UuKRt2WpNwo

nanoVNA - Coaxial Cable Measurement Methods (Characteristic Impedance and Cable Loss) - VE6WGM
https://www.youtube.com/watch?v=G66_iqOu-Bs

Gregg Messenger VE6WGM

https://www.youtube.com/watch?v=ntE_JyBXeLs

Building a Simple & Cheap 50-Ohm Dummy Load.

Cheap Spectrum Analyzer

https://www.youtube.com/watch?v=geXETa1_JN4

Testing Antennas with the LimeSDR Mini
https://medium.com/home-wireless/testing-antennas-with-the-limesdr-mini-98b59b99c8b9

#91: Basic RF Attenuators - Design, Construction, Testing - PI and T style - A Tutorial  (w2aew ) https://www.youtube.com/watch?v=A5gGeV7CiQ0

$15 Ebay Return Loss Bridge
https://www.youtube.com/watch?v=ct_ZUYTRkOA

RF Bridge
https://transverters-store.com/rf_bridge/rf_bridge.html

How not to damage your NanoVNA when measuring SWR
https://www.youtube.com/watch?v=totwu4IbavE

#568b​ TinySA NANOVNA Measure and Use 30dB Attenuators  --

IMSAI Guy https://www.youtube.com/watch?v=ljJcYFQS9KU

http://www.kerrywong.com/2014/11/16/testing-an-rtl-sdr-spectrum-analyzer/

#564​ NANOVNA Coax Loss Measurement
https://www.youtube.com/watch?v=mU71rGUKlBIa

also interesting...
How to receive and track LoRa Satellites (TinyGS). Incl. innovative ideas for your projects
Abreas Spiess
https://www.youtube.com/watch?v=ltJQjqm5bKA