Useful items for purchase

Highly recommended combination of LNA + dongle:

• LNA: https://rtl-sdr.com/new-product-rtl-sdr-blog-1090-mhz-ads-b-lna/

• short connecting cable for the two: https://www.amazon.com/DZS-Elec-Connecting-Coaxial-Extender/dp/B072FS4WMK

• receiver/dongle: https://www.amazon.com/NooElec-NESDR-SMArTee-SDR-R820T2-Based/dp/B079C3FHPG (always on bias-t: no software configuration needed to supply power to the LNA)

• alternative dongle, bias-t to be activated via software: rtl-sdr.com v3 dongle https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/

USB receivers / dongles:

• rtl-sdr.com v3 dongle: https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/
• Flightaware ProStick Plus: https://www.amazon.com/dp/B01M7REJJW
• Green Radarbox Flightstick: https://www.radarbox24.com/store

Good cheap starting antenna (much better than the whip antennas):

• https://www.ebay.de/itm/253915016420
• requires adapter: https://www.ebay.de/itm/352599709689

Coax choices:

• LMR400 or MPD400 is best
• If the LNA is close to the antenna the rest of the cable run doesn't matter as much.
• LMR240 or Belden H155 is also quite good coax
• Short runs or after an LNA: LMR195, CFD200

Better, a little pricier antennas:

• https://www.ebay.de/itm/303279152783 (fitting cable https://www.ebay.de/itm/303219313552)
• if the above links don't work, look at the link below
• https://www.ebay.de/sch/stanislavpalo130/m.html
• https://store.adsbexchange.com/products/5-5dbi-1090-978-antenna
• https://www.amazon.com/1090MHz-ADS-B-Antenna-66cm-26in/dp/B00WZL6WPO
• Premium: https://dpdproductions.com/collections/aviation-base-mobile-antennas/products/ads-b-vertical-outdoor-base-antenna
• All those better antennas require a cable like one of these (male N to male SMA) https://www.amazon.com/MPD-Digital-Shielded-Cable-Connectors/dp/B07RG6BTLC/

Raspberry Pi and sd-card

• https://www.amazon.com/CanaKit-Raspberry-Premium-Clear-Supply/dp/B07BC7BMHY
• https://www.amazon.com/dp/B06XX29S9Q

Filtered low noise amplifiers (LNAs):

• https://www.rtl-sdr.com/new-product-rtl-sdr-blog-1090-mhz-ads-b-lna/
• https://store.uputronics.com/index.php?route=product/product&path=59&product_id=50

Cavity filter:

• http://shop.sysmocom.de/products/cf1090-kt30-wideband

Interesting filter for other amplifiers (i would still prefer an LNA with builtin SAW filter): https://www.ebay.com/itm/1-SMA-M-F-50-VBFZ-1065-Bandpass-Filter-Mini-Circuits-for-FlightAware-1090MHz/132406298935