Low Frequency Radio Transmission

Sorry Mike for coming on a bit strong in my last post.


I have a bit of a soft spot for Omega and VLF, which likely commenced when back in 1976 I visited the Decca Navigator Green Slave at Neston, about 7 miles north of where we live. Standing in the ATU hut at the base of the Tee Aerial, you could hear the clacking of the relays as the aerial was retuned for each frequency in the sequence and also feel or sense the transmission keying. A strange sensation.  Te ATU hut for the MSF 60 kHZ service was a No Entry when transmitting at Rugby Radio, although likely at higher power than Decca Navigator.


When I visited Rugby Radio in 2007 just after MSF closed down, GBR on 15.975 kHz had been closed for some time and in its place an eLoran transmitter feeding a Tee aerial supported on two of the 820 foot masts. 

Besides Neston to the north, we also had Criggion 32 miles to the south.  Criggion, now closed with GBR, provided the UK Navy's GBZ service on 19.6 kHZ or more likely 19.575 kHz with MSK,

Criggion played a part in the development of Omega, a good guide to which is J A Pierce's Memoirs, a copy of which I found on the net before they were edited and depersonalised.


The eLoran service I mentioned at Rugby, transferred to Anthorn in I think 2014, but I am not sure of the current state since other transmitters in that chain have been switched off. That said, I can see a transmission centred on 100 kHZ, but where from I do no know. The signal being less than half of Anthorn's MSF on 60.0 kHz.

Cheers!

Clive

Sorry Mike for coming on a bit strong in my last post.


I have a bit of a soft spot for Omega and VLF, which likely commenced when back in 1976 I visited the Decca Navigator Green Slave at Neston, about 7 miles north of where we live. Standing in the ATU hut at the base of the Tee Aerial, you could hear the clacking of the relays as the aerial was retuned for each frequency in the sequence and also feel or sense the transmission keying. A strange sensation.  Te ATU hut for the MSF 60 kHZ service was a No Entry when transmitting at Rugby Radio, although likely at higher power than Decca Navigator.


When I visited Rugby Radio in 2007 just after MSF closed down, GBR on 15.975 kHz had been closed for some time and in its place an eLoran transmitter feeding a Tee aerial supported on two of the 820 foot masts. 

Besides Neston to the north, we also had Criggion 32 miles to the south.  Criggion, now closed with GBR, provided the UK Navy's GBZ service on 19.6 kHZ or more likely 19.575 kHz with MSK,

Criggion played a part in the development of Omega, a good guide to which is J A Pierce's Memoirs, a copy of which I found on the net before they were edited and depersonalised.


The eLoran service I mentioned at Rugby, transferred to Anthorn in I think 2014, but I am not sure of the current state since other transmitters in that chain have been switched off. That said, I can see a transmission centred on 100 kHZ, but where from I do no know. The signal being less than half of Anthorn's MSF on 60.0 kHz.

Cheers!

Clive