At the SNBCG operating site we have the opportunity to out up some large antenna, and for some time we had wanted to try 472 KHz using George M1GEO WSPR transmitter.
The plan was using the onsite 50m cellphone mast* to pull up some wire, and with some work hopefully, enough wire to have a 1/4 wave on 472 kHz. We calculated it would require around 150m of wire, and we had a pully on the mast at 42m, so we could pull up the first 50m as a vertical, and then have the next 100m sloping down from the last forming an “L” shape as best as we could into the next field.
The transmitter would be grounded to the mast earthing point, and we would run the 10w transmitter at the base of the mast overnight.
*for the avoidance of doubt we have permission to use the mast from the site owner.
The antenna slops down from 42m towards the ground.
With a little bit of tinkering, we had a resonant antenna on 472 KHz
We left the transmitter running overnight from JO01DQ with the call GB0SNB, and was delighted to see a number of reports all around Europe.
Here you can see the tower and yellow wire making its was up from the base, and then into an adjacent field.
| Timestamp | Call | SNR | Pwr | Reporter | RGrid | km | az |
| 2018-05-06 01:12 | GB0SNB | -28 | 0.01 | SM2DJK | KP03au | 1774 | 33 |
| 2018-05-06 01:12 | GB0SNB | -18 | 0.01 | SM3LNM | JP82qg | 1558 | 34 |
| 2018-05-06 00:50 | GB0SNB | -28 | 0.01 | EA1FAQ | IN71pn | 1188 | 201 |
| 2018-05-05 23:22 | GB0SNB | -22 | 0.01 | LA8AV | JO59cs | 1090 | 31 |
| 2018-05-05 22:14 | GB0SNB | -26 | 0.01 | EA2HB | IN93ah | 946 | 191 |
| 2018-05-05 23:34 | GB0SNB | -24 | 0.01 | LA3EQ | JO28xj | 828 | 24 |
| 2018-05-06 00:10 | GB0SNB | -15 | 0.01 | GM4OAS | IO76cx | 708 | 329 |
| 2018-05-05 22:08 | GB0SNB | -23 | 0.01 | DL1KAI | JO42vj | 654 | 79 |
| 2018-05-06 02:56 | GB0SNB | -28 | 0.01 | EI2KK | IO65ca | 651 | 308 |
| 2018-05-06 00:22 | GB0SNB | -28 | 0.01 | DF5FH | JO42um | 649 | 78 |
| 2018-05-06 01:16 | GB0SNB | -21 | 0.01 | DK7FC | JN49ik | 645 | 110 |
| 2018-05-05 23:22 | GB0SNB | -28 | 0.01 | DL1GCD/1 | JN48ar | 642 | 118 |
| 2018-05-05 22:08 | GB0SNB | -27 | 0.01 | DK6UG | JN49cm | 608 | 110 |
| 2018-05-06 00:16 | GB0SNB | -25 | 0.01 | DL0HT | JO43jb | 597 | 72 |
| 2018-05-05 23:34 | GB0SNB | -20 | 0.01 | F6GEX | IN97na | 526 | 190 |
| 2018-05-05 21:38 | GB0SNB | -28 | 0.01 | DF1VB/15 | JO33pl | 513 | 64 |
| 2018-05-06 11:58 | GB0SNB | -25 | 0.01 | DL/PA0EHG | JO32sq | 506 | 74 |
| 2018-05-05 23:34 | GB0SNB | -17 | 0.01 | F59706 | JN07th | 496 | 168 |
| 2018-05-06 00:10 | GB0SNB | -24 | 0.01 | DL6II | JO30nx | 481 | 97 |
| 2018-05-05 23:22 | GB0SNB | -27 | 0.01 | LX1DQ | JN39cq | 472 | 116 |
| 2018-05-05 23:22 | GB0SNB | -29 | 0.01 | DC0DX/RF | JO31lk | 462 | 91 |
| 2018-05-05 22:14 | GB0SNB | -28 | 0.01 | DC0DX/MW2 | JO31lk | 462 | 91 |
| 2018-05-06 01:24 | GB0SNB | -24 | 0.01 | DL2ZZ | JO31lo | 460 | 89 |
| 2018-05-06 04:38 | GB0SNB | -25 | 0.01 | PI4THT | JO32kf | 455 | 80 |
| 2018-05-05 22:00 | GB0SNB | -29 | 0.01 | PA0SLT/A | JO22xx | 411 | 67 |
| 2018-05-05 21:38 | GB0SNB | -22 | 0.01 | G0LUJ | IO83ls | 322 | 317 |
| 2018-05-05 23:22 | GB0SNB | -23 | 0.01 | G3WCB | IO80ei | 311 | 243 |
| 2018-05-05 21:56 | GB0SNB | -10 | 0.01 | PA3ABK | JO21it | 304 | 86 |
| 2018-05-06 01:40 | GB0SNB | -28 | 0.01 | PH2M | JO22hc | 301 | 79 |
| 2018-05-06 01:04 | GB0SNB | -15 | 0.01 | PA0EHG | JO22hb | 300 | 80 |
| 2018-05-05 23:22 | GB0SNB | -13 | 0.01 | G3KEV | IO94sh | 296 | 351 |
| 2018-05-06 11:58 | GB0SNB | -17 | 0.01 | PI9ESA | JO22ff | 292 | 76 |
| 2018-05-05 21:38 | GB0SNB | -12 | 0.01 | PA0RDT | JO11tm | 231 | 93 |
| 2018-05-06 11:52 | GB0SNB | -12 | 0.01 | G6KSN | IO82xj | 178 | 297 |
| 2018-05-05 23:34 | GB0SNB | -13 | 0.01 | G4ZFQ | IO90ir | 153 | 227 |
| 2018-05-06 01:16 | GB0SNB | -18 | 0.01 | M0XDK | IO92ne | 97 | 305 |
| 2018-05-06 13:32 | GB0SNB | 11 | 0.01 | G4GIR | IO92sd | 72 | 315 |
| 2018-05-06 00:10 | GB0SNB | -4 | 0.01 | G4FKI | IO92sa | 63 | 306 |
| 2018-05-06 14:22 | GB0SNB | 1 | 0.01 | G8EMO | IO92uc | 61 | 319 |
| 2018-05-06 04:16 | GB0SNB | -26 | 0.01 | G3YMN | IO91tj | 56 | 235 |
| 2018-05-05 20:56 | GB0SNB | 4 | 0.01 | G6AVK | JO01ho | 25 | 112 |
| 2018-05-05 22:14 | GB0SNB | 1 | 0.01 | M0TAZ | JO01cn | 15 | 203 |
