SV1XV's photos

Broadband sensor antenna of the National Observatory of Electromagnetic Fields (Εθνικό Παρατηρητήριο Ηλεκτρομαγνητικών Πεδίων) on a roof near Katechaki Metro Station. This broadband station is a NARDA AMB-8057-03/G and measures the intensity of the field in the band 100 kHz – 7 GHz and in three special bands related to GSM mobile networks (EGSM 900 925 MHz – 960 MHz, EGSM 1800 1805 MHz – 1880 MHz and UMTS 2110 MHz – 2170 MHz). (DSCN0837) This work is licensed under a Creative Commons Attribution 4.0 International License .

The former ERA-4/ERA Sport (before 1982 YENED Athens) medium wave antenna at Megara - Pachi peninsula. (DSCN0843)

Information board at the entrance of Hellenic Telecommunications and Posts Commission monitoring station at Aspra Chomata. (DSCN0832)

General view of the antenna mast at the Hellenic Telecommunications and Posts Commission monitoring station at Aspra Chomata. (DSCN0830) This work is licensed under a Creative Commons Attribution 4.0 International License .

VHF-UHF-SHF receiving antennas at the Hellenic Telecommunications and Posts Commission monitoring station at Aspra Chomata. (DSCN0829) This work is licensed under a Creative Commons Attribution 4.0 International License .

UltraBeam HF antenna at the Hellenic Telecommunications and Posts Commission monitoring station at Aspra Chomata. (DSCN0836) This work is licensed under a Creative Commons Attribution 4.0 International License .

Vintage QSL card from ZP5CF to GD3ENK confirming a 28 MHz phone QSO on 1955-09-19 at 14:05 UTC, mailed with regular Paraguay postage stamps and in addition stamped by with a rubber stamp imprint by the Secretariat of Radio Club Paraguayo (address side).

Vintage QSL card from ZP5CF to GD3ENK confirming a 28 MHz phone QSO on 1955-09-19 at 14:05 UTC (text side).

Soviet Union postage stamp of 4 kopecks showing research vessel "Ernst Krenkel" ("Эрнст Кренкель"), IMO:7205685, with portrait of Ernst Teodorovich Krenkel, RAEM, (1903-1971).

QSL card frim K5LAD to W0PLN confirming a phone (AM) QSO on 3942 kHz on January 22, 1966. Public domain image (published in the USA without a © note) posted to Twitter by @HamRadioPorn . Twiter link: twitter.com/HamRadioPorn/status/936406560082989056

Argentina: stamp in commemoration of Amateur Radio (1980).

GREECE: Plasser & Theurer EM120 track recording railcar of OSE at Agios Ionnis engine depot. (DSC 0421) This work is licensed under a Creative Commons Attribution 4.0 International License .

GREECE: GE/Caterpillar UM10B diesel shunter and Plasser & Theurer EM120 track recording railcar of OSE at Agios Ionnis engine depot. (DSC 0457) This work is licensed under a Creative Commons Attribution 4.0 International License .

Penny Red stamp, sheet location BH (1841).

Greece: current issue postal stationery (stamped envelope), special request branded with the name and address of the Hellenic Telecommunications & Posts Commission (EETT). Postmark of the Attica Sorting Office (Κ. Δ. ΑΤΤΙΚΗΣ) on 2014-11-10.

TAAF first day cover (FDC) with the stamps commemorating the DXpedition on Tromelin Island, with additional machine cancellation "25-03-15" (2015-03-25), possibly date of actual posting.

Whales (faulty transmitter) signal on Perseus SDR.

Whales (faulty transmitter) signal on Perseus SDR.