OH3SHF Microwave Beacons in Tampere, Finland

OH3TR operates the OH3SHF microwave beacons. The 2.3, 3.4, 5.7, 10 and 24 GHz beacons are co-located with our 6 m and 70 cm FM speech repeater on the Hervanta water tower in KP11VK where we also have our VHF/UHF/microwave contest station.

The 2.3/3.4/5.7/10/24 GHz beacons are off the air starting 31th October 2021 due to construction work on the water tower

Our 1.3 GHz beacon is licensed again for at least one year at a time now. It is hosted by the OH3NE club at their repeater site on the Tesoma water tower.

This picture of downtown Tampere at night, taken from the observation platform in Hervanta to the northwest where the Näsinneula observation tower with its OH3RNE FM repeaters is the distinguished landmark of Tampere, should give you an idea about the ideal location of the site. The horizon is far, far away, no matter which direction you look to. More pictures and a video clip can be found on the page profiling our VHF/UHF/SHF contest station.

The beacon antennas in Hervanta are mounted on a tubular mast on the sightseeing platform, about 210 m asl/55 m agl. The picture shows the original installation on our VHF/UHF/microwave contest tower. The tip of the tower is 222 metres above sea level and 67 metres above ground level on the highest hill in town, quite near the university. The hardware is made by OH3LWP and OH3MCK with some help from the club members in installation and testing.

On the upper bands, the leading edge of the first dash of the letter "O" in the message is synchronised with a GPS receiver to the start of every minute. The 23 cm beacon is utilizing the PI4 mode by OZ2M.

Frequency accuracy of the beacons is better than 100Hz. The upper bands in Hervanta used originally a home brewed GPS locked 10 MHz reference by OH3MCK. The Philips GPS unit was later changed to a Rockwell one go tet rid of drift burst problems. Both sites now use a 10 MHz reference from a Tekelec Temex GPS disciplined timing unit.

"We are always exact, with other beacons your mileage may vary"

OH3SHF 1.3 GHz beacon on 1296.850 MHz

• Tesoma water tower KP11TM
• PI4 modulation
• 40 W transmitter power
• single slot Alford slot antenna 180 m asl
• about 8 dBi omnidirectional gain, horizontal polarisation
• ERP 50 W

The 23 cm beacon was shut down by Traficom 31st March 2020 because the radio amateurs in Finland lost the general access to the band. The beacon has now received an license extension to operate for one year at a time so far.

OH3SHF 2.3 GHz beacon on 2320.842 MHz

• Hervanta water tower KP11VK
• 50 W transmitter power
• single slot Alford slot antenna 222 m asl
• about 6 dBi omnidirectional gain, horizontal polarisation
• ERP 125 W

OH3SHF 3.4 GHz beacon on 3400.800 MHz

• Hervanta water tower KP11VK
• 6 W transmitter power
• single slot Alford slot antenna 222 m asl
• about 6 dBi omnidirectional gain, horizontal polarisation
• ERP 13.5 W

OH3SHF 5.7 GHz beacon on 5760.800 MHz

• Hervanta water tower KP11VK
• 8 W transmitter power
• 32 slot slotted waveguide antenna 222 m asl
• about 13 dBi omnidirectional gain, horizontal polarisation
• ERP 100 W

OH3SHF 10 GHz beacon on 10368.800 MHz

• Hervanta water tower KP11VK
• 4 W transmitter power
• 64 slot slotted waveguide antenna 222 m asl
• 15 dBi omnidirectional gain, horizontal polarisation
• ERP 80 W

OH3SHF 24 GHz beacon on 24048.800 MHz

• Hervanta water tower KP11VK
• About 0.5 W transmitter power
• 128 slot slotted waveguide antenna 222 m asl
• 15 to 18 dBi omnidirectional gain, horizontal polarisation
• Best radiation to east/west, smaller lobes to north/south
• ERP 30 W to the directions of maximum

All bands have individual messages:

Beacon message for 1.3 GHz:

OH3SHF KP11TM 1296850 kHz [long dash]

Beacon message for 2.3 GHz:

OH3SHF KP11VK 2320842 kHz [long dash]

Beacon message for 3.4 GHz:

OH3SHF KP11VK 3400800 kHz [long dash]

Beacon message for 5.7 GHz

OH3SHF KP11VK 5760800 kHz [long dash]

Beacon message for 10 GHz

OH3SHF KP11VK 10368800 kHz [long dash]

The 1.3 GHz signal is multiplied by two from a VCO running at about 648 MHz locked to reference.

The 2.3 GHz signal is multiplied by two from a VCO running at about 1,15 GHz locked to reference.

The 5.7 GHz signal is multiplied by four from a VCO running at about 1,4 GHz locked to reference.

The 10 GHz signal is multiplied by six from a VCO running at about 1,7 GHz locked to reference.

CW keying is done at VCO frequency.

The 5 and 10 GHz beacons were installed and activated in KP11VK on 15th June 2002 by OH3LWP and OH3MCK.

The 2.3 GHz band was installed and activated in KP11VK on 13th May 2003 by OH3LWP and the group. You can find some pictures of the installation here.

The 10 MHz GPS locked reference was added by OH3MCK in June 2003.

The beacon was QRT for a few weeks during the summer of 2003 due to damage from a lightning strike.

The 2.3 GHz band transmitter power was increased to 50W on 17th December 2003.

The 3.4 GHz band was installed and the 10 GHz TX power was increased to 4 W by OH3LWP in June 2005.

Some bands were again QRT for a few weeks during the summer of 2005 due to another lightning strike. This time more suppressors were added, also in the lines coming from the tower to the rack in the shack. The beacon was restored fully operational August 15th by OH3MCK and OH3LWP.

The 24 GHz beacon was installed by OH3LWP and OH3MCK July 12th, 2006. The GPS reference was also updated then.

All other beacons except 24 GHz have been off the air twice during September/October 2006. The problem was traced to a bad connection at the fuse holder in the +17 volt supply. The faulty holder was replaced October 9th.

The 1.3 GHz beacon was installed by OH3LWP, OH3HWX and OH3BK October 2nd, 2016.

Reception reports

We have picked up some exceptional reports of the beacon via DX Summit:

Here follows the complete listing of spots:

2003

SM0DFP  5760800.0 OH3SHF      5dB above noise               1917 16 May 2003
SM3BEI  5760800.0 OH3SHF      53s in JP81NG, 2G and 10G beac1157 25 May 2003
SM3BEI 10368839.0 SK0SHH      41S, 1SHH 52S, OH3SHF 5760800 2200 29 Jun 2003
SM3BEI  5760800.0 OH3SHF      539 in JP81NG                 0501 30 Jun 2003
SM3BEI 10368851.0 SK1SHH      42S,0SHH 51S,OH3SHF 5760,8 5390503 30 Jun 2003
SM3BEI 10368851.0 SK1SHH      41S,0SHH-42S,OH3SHF 5760,8 5391826 30 Jun 2003
SM3BEI 10368839.0 SK0SHH      529,3HSS 419,OH3SHF 5760=539  1143 07 Jul 2003
SM3BEI 10368851.0 SK1SHH      419, 0SHH 529,OH3SHF 5G7 529  1655 07 Jul 2003
SM3BEI 10368839.0 SK0SHH      519, oh3shf 5760 559          2110 07 Jul 2003
SM3BEI 10368843.0 SK0SHI      529. oh3shf 2320 579          2111 07 Jul 2003
SM3BEI 10368851.0 SK1SHH      17S, OH3SHF 5760 559          1819 09 Jul 2003
SM3BEI 10368839.0 SK0SHH      59S, 0SHH 53S, OH3SHF 5G7,559 1821 09 Jul 2003
SM3BEI 10368851.1 SK1SHH      57S, OH3SHF 2320 529          1823 09 Jul 2003
SM3BEI 10368839.0 SK0SHH      599, oh3shf 5760, 539         2225 10 Jul 2003
SM3BEI 10368851.0 SK1SHH      529, oh3shf 2320 539          2226 10 Jul 2003
SM3BEI 10368839.0 SK0SHH      429, OH3SHF 2G=549, 5G= 559   2127 12 Jul 2003
SM3BEI 10368839.0 SK0SHH      599, 0SHI 599 OH3SHF 2G3 529  2339 13 Jul 2003
SM3BEI 10368839.0 SK0SHH      529, 0SHI/1SHH nil, OH3SHF 5G-2113 14 Jul 2003
SM3BEI  1296834.0 OH6SHF      549, OH3SHF 2320 559        OH0532 16 Jul 2003
SM3BEI  1296834.0 OH6SHF      549, OH3SHF 2320 559          0532 16 Jul 2003
SM3BEI 10368839.0 SK0SHH      529, OH3SHF 5760 559          0533 16 Jul 2003
SM3BEI 10368800.0 OH3SHF      41S, 2320= 559, 5760= 56S     2136 16 Jul 2003
SM3BEI  1296834.0 OH6SHF      579, OH3SHF 2G3 559, 5G7 56SOH2109 17 Jul 2003
SM3BEI  1296834.0 OH6SHF      579, OH3SHF 2G3 559, 5G7 56S  2109 17 Jul 2003
SM3BEI 10368839.0 SK0SHH      529, OH3SHF 5760 56S          2110 17 Jul 2003
SM3BEI 10368807.0 OH3SHF      54S vy QSB in JP81NG          2117 17 Jul 2003
SM3BEI 10368839.0 SK0SHH      52S in JP81NG, OH3SHF 5G 54S  0824 26 Jul 2003
SM3BEI 10368807.0 OH3SHF      53S in JP81NG, 5760= 59S      0818 27 Jul 2003
SM3BEI 10368851.0 SK1SHH      559 in JP81NG, OH3SHF NIL     2053 28 Jul 2003
SM3BEI 10368843.0 SK0SHI      579 JP91NG, OH3SHF 5760 539   0510 10 Aug 2003
SM3BEI 10368800.0 OH3SHF      Not heard, but 5760800 599+30d2358 11 Aug 2003
SM3BEI 10368851.0 SK1SHH      56S in JP81NG, OH3SHF 5G 549  2323 14 Aug 2003
SM3BEI 10368839.0 SK0SHH      52S in JP81NG OH3SHF 5G7 53S  1542 26 Aug 2003
SM3BEI 10368839.0 SK0SHH      55s in JP81NG OH3SHF 5G7 569  0813 18 Sep 2003
SM3BEI 10368851.0 SK1SHH      569 in JP81NG OH3SHF/5760 559 2235 01 Oct 2003
SM3BEI 10368839.0 SK0SHH      52s in jp81ng OH3SHF NIL for l1639 09 Oct 2003

2004

SM3LBN  2320842.0 OH3SHF      55 norm nil copy            OH0541 17 Apr 2004
SM3LBN  2320842.0 OH3SHF      55 norm nil copy              0541 17 Apr 2004
SM3LBN  2320842.0 OH3SHF      559 in JP80. norm=Nil       OH0427 02 May 2004
SM3LBN  2320842.0 OH3SHF      559 in JP80. norm=Nil         0427 02 May 2004
SM0LCB 10368800.0 OH3SHF/B    S1 weak in jo86gh           OH2310 06 Aug 2004
SM0LCB 10368800.0 OH3SHF/B    S1 weak in jo86gh             2310 06 Aug 2004
SM0LCB 10368800.0 OH3SHF/B    S1-2 in jo86gh                0348 07 Aug 2004
SM3LBN  2320842.0 OH3SHF/B    59 IN JP80                    2030 09 Sep 2004
SM0DFP  2320844.0 OH3SHF      KP11VK 589 QRB 400km          2119 03 Nov 2004
SM0DFP  5760806.0 OH3SHF      KP11VK 579 ufb sigs           2121 03 Nov 2004
DL7VTX  2320845.0 OH3SHF/B    529 kp11-jo62                 2347 10 Dec 2004

2005

SM3BEI 10368800.0 OH3SHF      529, 5G7 549, 2G3 559 in JP81N2155 23 Jun 2005
SM3LBN  2320840.0 OH3SHF      539                           2216 26 Jun 2005
SM3LBN 10368800.0 OH3SHF      529                           2216 26 Jun 2005
SM3BEI  5760800.0 OH3SHF      549 in JP81NG                 2219 26 Jun 2005
SM3BEI 10368800.0 OH3SHF      599 in JP81NG, 5G7=599+20, 2G=2209 07 Jul 2005
SM3BEI  2320842.0 OH3SHF      599+30dB in JP81NG 5G7= 599+202211 07 Jul 2005
SM3BEI 10368800.0 OH3SHF      559, 5G7= 579, 2G3 = 599      2109 09 Jul 2005
SM3BEI  2320842.0 OH3SHF      599 in JP81NG 5G7=579         2111 09 Jul 2005
SM7LCB 10368800.0 OH3SHF/B    JO86>KP11 706km/033deg        1928 18 Aug 2005
SM7LCB 10368800.0 OH3SHF      Misstake by me, no copy!      1932 18 Aug 2005
SM7LCB 10368800.2 OH3SHF      Misstake by me, no copy!      1932 18 Aug 2005
SM0DFP  5668800.0 OH3SHF      559 in jo89vk                 0416 19 Aug 2005
SM0DFP  5760800.0 OH3SHF      sri, QRG 5760.800             0420 19 Aug 2005
SM3BEI 10368800.0 OH3SHF      599+, 5760 59+40, 2G3 59+60   2214 19 Aug 2005
SM3LBN  2320842.0 OH3SHF      539                           0438 20 Aug 2005
SM3LBN 10368800.0 OH3SHF      519                           0450 20 Aug 2005
SM3LBN  2320842.0 OH3SHF/B    529 norm nil                  1337 20 Aug 2005
SM1HOW 10368809.0 OH3SHF      KP11>JO97 539                 2131 20 Aug 2005
SM3BEI 10368842.0 OH3SHF      559 in JP81NG, 5G7 is 579     0541 01 Sep 2005
SM0DFP 10368800.0 OH3SHF      s1 on 3 and s5 on 6cm         0531 02 Sep 2005
SM3BEI  1296927.0 OH2SHF      599, OH3SHF 599 2/5/10 G      0539 22 Sep 2005
SM3BEI 10368800.0 OH3SHF      599+, also 2G, 5G, in JP81NG  0541 22 Sep 2005
SM4DHN  1296974.0 OH3SHF/B    539                           0727 08 Oct 2005
SM3BEI 10368800.0 OH3SHF      519 condx norm, No tropo      0526 09 Oct 2005
SM3BEI 10368800.0 OH3SHF      529 in JP81NG, Slight Tropo   0536 11 Oct 2005
SM3LBN  2320842.0 OH3SHF/B    529                           1955 12 Oct 2005
SM0DFP  2320842.0 OH3SHF      kp11vk 579 norm nil           1947 13 Oct 2005
SM0DFP  5760800.0 OH3SHF      539 norm nil                  1952 13 Oct 2005
SM7GEP  2320842.0 OH3SHF      jo77>kp11 559 norm nil        2006 13 Oct 2005
SM0DFP 10368800.0 OH3SHF      539 and increasing            2019 13 Oct 2005
SM7LCB 10368800.0 OH3SHF      JO86>KP11 706km 539! fb!      2029 13 Oct 2005
SM3BEI 10368800.0 OH3SHF      599 in JP81NG, 2G, 5G 599++   0506 17 Oct 2005
SM3BEI 10368800.0 OH3SHF      599+ in JP81NG also 2/5G      1628 17 Oct 2005
SM0DFP  2320842.0 OH3SHF      539 in QSB                    1836 17 Oct 2005
SM3AKW  2320842.0 OH3SHF      579 jp92                      1853 17 Oct 2005
SM7GEP  2320842.0 OH3SHF/B    jo77>kp11 569 Any OH qrv?     1913 17 Oct 2005
SM3LBN 10368800.0 OH3SHF      559 kp11(>jp80                1922 17 Oct 2005
SM3LBN  2320842.0 OH3SHF      OH3SHF 599                    1924 17 Oct 2005
SM3LBN 10368800.0 OH3SHF/B    559                           2047 17 Oct 2005
SM3BEI 10368800.0 OH3SHF      419 in JP81NG Condx E normal  0516 18 Oct 2005
SM3BEI 10368800.0 OH3SHF      419 in JP81NG, 5G 549 2G 569  1105 18 Oct 2005
SM0DFP  5760800.0 OH3SHF      539 kp11-jo89                 0503 20 Oct 2005

2006

SM3LBN  2320842.0 OH3SHF/B    599+20db !!                   2121 06 Jan 2006
SM3LBN  2320842.0 OH3SHF/B    599+20db  any stn for qso?    0830 07 Jan 2006
SM3AKW  2320842.0 OH3SHF      59+9 jp92ao                   1151 07 Jan 2006
SM6AFV  2320842.0 OH3SHF/B    55 KP11>JO67                  1200 07 Jan 2006
SM3BEI 10368800.0 OH3SHF      599 JP81NG also 5760/2320 599 1752 07 Jan 2006
SM0DFP  2320843.0 OH3SHF/B    kp11vk                        2123 07 Jan 2006
SM3BEI  2320842.0 OH3SHF      KP11VK 59 in JP81 as 5/10G als0357 07 May 2006
SM3BEI 10368800.0 OH3SHF      KP11VK 59 in JP81, 5 & 2G also0400 07 May 2006
SM1HOW 10368800.0 OH3SHF/B    559 JO97 es GN                2216 17 Jun 2006
SM3BEI 10368800.0 OH3SHF      599+++ in JP81, as 5 & 2G beac0419 18 Jun 2006
SM3BEI  5760800.0 OH3SHF      599+++ in JP81, as 10G 2,3G Be0421 18 Jun 2006
SM3BEI  2320842.0 OH3SHF      599+++ in JP81, as 5,7 & 10G b0422 18 Jun 2006
SM7LCB 10368800.0 OH3SHF      JO86>KP11 706km 579 fbcpy     2116 03 Jul 2006
SM3BEI 10368800.0 OH3SHF      599+++  KP11VK-JP81NG, +2/5Gbe2105 05 Jul 2006
SM3BEI  2320842.0 OH3SHF      599+++ KP11VK-JP81NG, +5G/10G 2106 05 Jul 2006
SM3BEI  5760800.0 OH3SHF      599+++ KP11VK-JP81NG, 2G/10G  2107 05 Jul 2006
SM3LBN 10368800.0 OH3SHF      579 norm nil                  0308 06 Jul 2006
SM0DFP  5760800.0 OH3SHF      KP11 579 in jo89 norm nil     0425 06 Jul 2006
SM7LCB 10368799.5 OH3SHF      JO86>KP11 706km 539           0433 06 Jul 2006
SM3BEI 10368800.0 OH3SHF      539 KP11VK-JP81NG             0529 06 Jul 2006
SM3BEI  2320842.0 OH3SHF      599 ++  KP11VK - JP81NG       0532 06 Jul 2006
SM3BEI 10368800.0 OH3SHF      419 in JP81 5/2G 579          2151 06 Jul 2006
SM3BEI  2320842.0 OH3SHF      579 in JP81 5Gbeac 579        2152 06 Jul 2006
SM3BEI 10368800.0 OH3SHF      589 in JP81, increasing       2338 06 Jul 2006
SM3BEI 10368800.0 OH3SHF      419 in JP81NG, 5G beac 559    0522 07 Jul 2006
SM3BEI  2320842.0 OH3SHF      589 IN jp81, kp11vk           0523 07 Jul 2006
SM3BEI  2320842.0 OH3SHF      589 in JP81, 10G beac NIL     2040 07 Jul 2006
SM3BEI  5760800.0 OH3SHF      569 in JP81, 10G beac NIL nw  2041 07 Jul 2006
SM3BEI  2320842.0 OH3SHF      589 in JP81 10Gbeac NIL       0459 08 Jul 2006
SM3BEI  5760800.0 OH3SHF      569 in JP81 OH2SHF NIL        0500 08 Jul 2006
SM3BEI  2320842.0 OH3SHF      569, KP11/JP81 norm, 10G-NIL  0517 11 Jul 2006
SM3BEI  5760800.0 OH3SHF      559, KP11/JP81 norm, OH2SHF/100523 11 Jul 2006
SM3BEI 10368800.0 OH3SHF      569 in JP81, 5/10G beac 59+   2037 12 Jul 2006
SM3BEI  2320842.0 OH3SHF      599+++ KP11-JP81 UFB Tropo    2043 12 Jul 2006
SM3BEI 10368800.0 OH3SHF      539 KP11-JP81, OH2SHF NIL     0508 13 Jul 2006
SM3BEI  2320842.0 OH3SHF      569, KP11-JP81, 5G Beac 559   0510 13 Jul 2006
SM3BEI  2320842.0 OH3SHF      559 in JP81, 10G Beac NIL     2218 15 Jul 2006
SM3BEI  5760800.0 OH3SHF      559 in JP81, OH2SHF/10G NIL   2219 15 Jul 2006
SM3BEI 10368800.0 OH3SHF      599+++ KP11-JP81 UFB Tropo    2038 16 Jul 2006
SM3BEI  2320842.0 OH3SHF      599 BOOMING as 5,7G beacon    2039 16 Jul 2006
SM3LBN  2320842.0 OH3SHF      599                           0136 17 Jul 2006
SM3BEI 10368800.0 OH3SHF      599+++ in JP81, OH2SHF NIL    0444 17 Jul 2006
SM3BEI  2320842.0 OH3SHF      599+++ in JP81, as 5,7G beac  0446 17 Jul 2006
SM3BEI  2320842.0 OH3SHF      599 ++ in JP81                1601 22 Jul 2006
SM3BEI 10368800.0 OH3SHF      559 in JP81, 5G-beac 599      1601 22 Jul 2006
SM3BEI 10368800.0 OH3SHF      599 ++ in JP81, OH2SHF NIL    2314 22 Jul 2006
SM3BEI 10368800.0 OH3SHF      579 in JP81NG                 0400 23 Jul 2006
SM3BEI 10368800.0 OH3SHF      559 in JP81, 5G Beac 579      0521 24 Jul 2006
SM3BEI  2320842.0 OH3SHF      579 in JP81NG, normal         0528 24 Jul 2006
SM3BEI 10368800.0 OH3SHF      569/S in JP81NG               2037 24 Jul 2006
SM3BEI  2320842.0 OH3SHF      599 in JP81, 5G beac 599      2041 24 Jul 2006
ES2RJ  10368800.0 OH3SHF/B    kp11vk-ko29km 559/S           2107 24 Jul 2006
SM3AKW  2320842.0 OH3SHF/B    599                           2113 24 Jul 2006
SM3BEI 10368800.0 OH3SHF      599 + in JP81, OH2SHF NIL, 10G2228 24 Jul 2006
SM3BEI  2320842.0 OH3SHF      59+40 as 5g7 beac in JP81NG   2230 24 Jul 2006
ES2RJ  10368800.0 OH3SHF/B    599+++ in KO29 Pure Tropo     0355 25 Jul 2006
SM3BEI  2320842.0 OH3SHF      59+20, 5G Beac  59+30 in JP81 0500 25 Jul 2006
SM3BEI 10368800.0 OH3SHF      579, OH2SHF 10G beac NIL, QRT 0502 25 Jul 2006
SM3AKW  2320842.0 OH3SHF/B    599 JP92AO                    2100 25 Jul 2006
SM3LBN 10368800.0 OH3SHF/B    53RS                          1912 27 Jul 2006
SM3LBN 10368800.0 OH3SHF      KP11>JP80 RS                  2156 27 Jul 2006
SM3BEI  2320842.0 OH3SHF      59++ JP81, QRV 2320200 ESE    0447 06 Aug 2006
SM3BEI 10368800.0 OH3SHF      599 in JP81, OH2SHF NIL       0448 06 Aug 2006
SM3LBN 10368800.0 OH3SHF/B    539                           0540 09 Aug 2006
SM3LBN 10368800.0 OH3SHF/B    579 Anyone qrv 3cm in OH ?    0522 10 Aug 2006
ES2RJ  10368800.0 OH3SHF      55S KP11-KO29 QTF 340         1454 16 Aug 2006
ES2RJ  10368800.0 OH3SHF      57S QTF 342 deg.              1115 21 Aug 2006
SM3LBN 10368800.0 OH3SHF      51RS                          1831 22 Aug 2006
SM3BEI 10368800.0 OH3SHF      569 in JP81 5760 beac 599     1658 24 Sep 2006

2007

OH5IY-@ 2320942.0 OH3SHF/B    Tropo 25 dB over noise        1742 06 Feb 2007
SM3LBN 10368800.0 OH3SHF      539                           0510 26 Mar 2007
SM3LBN  2320842.0 OH3SHF      539                           2100 26 Mar 2007
SM3AKW  2320842.0 OH3SHF/B    599                           1816 27 Mar 2007
SM7LCB 10368799.2 OH3SHF      JO86>KP11 706km 539 FB!       2021 28 Mar 2007

More recent reports are available on the DX Summit (press Refresh spots if you can't see the spots).

More pictures of the beacon and antennas

The pictures are here for download. Please feel free to use them, just mention the source.

You can find the list of all Finnish amateur radio beacons on the SRAL pages.

Please point your link to .shtml-files instead of .html-files, when linking to OH3TR pages. Thank you!

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