2017-09-23, 08:10
Hi All
I now have my linear power supply running and shielded cables. The Vin is showing at 4.50 with a very thin trace although at the supply terminals it is a steady 4.99V.
It has made a small difference and I get quite good signals on channel 1 (watching the live maps my C1 [N/S ferrite] coincides with observed flashes and the site comes up on maps from time to time) - but very little in signals on C2 [E/W]. C1 has quite a lot of 40,60,80 Khz noise but still works. Maybe LP filters ? I soldered tails on the ferrite leads and thought there might be high resistance across the leads but it was nil.
In preparation for fitting filters I looked for the jumper mentioned but could not find it on blue board 19.3.
Regards
Alan
I now have my linear power supply running and shielded cables. The Vin is showing at 4.50 with a very thin trace although at the supply terminals it is a steady 4.99V.
It has made a small difference and I get quite good signals on channel 1 (watching the live maps my C1 [N/S ferrite] coincides with observed flashes and the site comes up on maps from time to time) - but very little in signals on C2 [E/W]. C1 has quite a lot of 40,60,80 Khz noise but still works. Maybe LP filters ? I soldered tails on the ferrite leads and thought there might be high resistance across the leads but it was nil.
In preparation for fitting filters I looked for the jumper mentioned but could not find it on blue board 19.3.
Regards
Alan
Stations: 2004