Radio (general)

A Raytheon 2J56A magnetron tube, at the exhibition space of the Radio Amateur Association of Greece. (P8250043) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

A vacuum thermal timing switch with octal base, from the permanent exhibition of the Radio Amateur Association of Greece. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

A Triplett 3256 HF wavemeter (frequency meter) covering 3.5-30 MHz in two bands. From the amateur radio station of Akis Lianos, SV1AD, now in the collection of the Radio Amateur Association of Greece (RAAG). (P8250034) Also uploaded on Wikimedia Commons: commons.wikimedia.org/wiki/File:Triplett_3256_wavemeter.jpg This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 International License .

Moxon antenna for VHF, by IZ1KSW Flickr image: https://www.flickr.com/photos/iz1ksw/4874579905/ (IMG_7546) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

Moxon antenna for VHF, by IZ1KSW Flickr image: https://www.flickr.com/photos/iz1ksw/4874577865/ (IMG_7540)

Kokusai MF0455-10Z mechanical filter. Photograph by JA1VBN, uploaded on Flickr under a CC-BY-SA-2.0 free license. Flickr file: www.flickr.com/photos/ja1vbn/4830115127 Short URL: flic.kr/p/8mPAX2 This work is licensed under a Creative Commons Attribution-ShareAlike 2.0 International License .

A Weston thermal ammeter with a wide frequency range (DC-60 MHz), mounted in a die-cast aluminium case with SO-239 coaxial connectors, for in-line antenna current measurement. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

A 6CW4 nuvistor tube for VHF small signal applications.

Reverberation Chamber in IETR, Rennes France, by Emmanuel Amador . Original on Flickr: www.flickr.com/photos/emmanuelamador/4638727141

A quartz radio room clock, sold by Seldec Publishing, in own collection. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

OFCOM Châtonnaye Funküberwachung -radio monitoring station-, Switzerland, 22 March 2009, 14:44:23 by Wikipedia user HBD20 Photo uploaded on Wikimedia Commons under a Creative Commons CC-BY-SA-3.0 free license. Wikimedia Commons file: commons.wikimedia.org/wiki/File:OFCOM_Chatonnaye.jpg This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 International License .

A Simoco VHF/FM radio (top) and a Motorola MTM700 Tetra radio (bottom), in the driving cab of an Athens suburban Electric Desiro train. (P2170021)

A portable UHF military satellite station. USAF Airman 1st Class Taylor Urreta, 355th Communications Squadron radio frequency transmission systems journeyman, tests a portable man packed radio at Davis-Monthan AF Base, AZ., Feb. 2, 2012. The radio is used by special ops to communicate back to the base station when on a mission. (U.S. Air Force photo by Airman 1st Class Camilla Griffin/Released) (120203-F-ML420-006)

A VHF-UHF log-periodic directional antenna for 140-450 MHz. (P8130001) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

Samos airport (LGSM) NDB antenna. SMO-375 kHz (P3170182) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

Photo from the General Assembly of the Radio Amateur Association of Greece (RAAG) 2008. Left to right: SV1EDZ, SV1IZR (standing), SV1AMY, SV1JG, SV1IW (standing), SV1EM. Also uploaded on Wikimedia Commons: commons.wikimedia.org/wiki/File:RAAG_General_Assembly_2008.jpg This work is licensed under a Creative Commons Attribution 4.0 International License .

The (then) new control tower and the old control tower of Dekelia (Tatoi) Air Base. (PB080044) This work is licensed under a Creative Commons Attribution 4.0 International License .

The (then) new control tower of Dekelia (Tatoi) Air Base. (PB080063) This work is licensed under a Creative Commons Attribution 4.0 International License .