SWL I1-14748 since 1960's and licensed OM since 1969 with original callsign I1EFO.
ARRL DXCC Honor Roll award since 1996.
Rarely I use vintage equipments manifactured in USA from 1945 up to 1962 operating on CW/AM or early "phasing method" SSB generation and old transceivers with "crystal filter" SSB generation FPM300 (1974) and Swan 350B (1977). I'm first classified on "International Vintage Contest HF" 4°, 5° and 6° Editions (years 2011, 2012 and 2013) cat. A/SOS-1959 with Heath SB10 transmitter and Hallicrafters S-107 receiver.
On digital modes now I'm using an old Yaesu FT747GX manufactured year 1987: I prefer JT9-1 and WSPR modes. Since 10 september 2013 I'm using my FT747GX on 630 meter band JT9-1 and WSPR-2.Most of my WSPR activity is around earth's grey-line time. See my everyday WSPR signal at monitor of DL1DBC's station (at 855 km distance from my station).
For 472 kHz activity I'm using the FT747GX transceiver withTX down-converter (tnx John WG2XKA) with about 12W output into 8m height inverted-L antenna (115m total lenght) . I get 0.5A aerial current (measured withthermocouple ammeter) which is what I reckoned was needed for 1W ERP with calculated antenna efficencyabout 8%. On reception I add at FT747GX a Yaesu FRT-7700 preselector and homebrew digital active band-pass audio filter based on SCF MF10 CMOS.
You can see my best 472 kHz WSPR trasmission activity at http://wsprnet.org/olddb?mode=html&band=2190&limit=2500&findcall=i5efo&findreporter=&sort=distance.
For VLF, LF and MF reception I'm using also the Cushman CE-24A matched with outdoor MINS TECH "Beverage" 400 meters long passive antenna or indoor MFJ-1030A preselector/preamplifier with 30 cm whip antenna.
See call IW5EFO of my last son Daniele (MD), together my first son SWL I5-2701-FI Gabriele (Lawyer), at http://www.qrz.com/db/iw5efo site too.
Last modified: 2014-01-18 16:00:01, 2975 bytes
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