[Aavso-sid-list] SID receivers

[Francois Steyn]

Hi SID Monitors !!

For the last few years,I have been scanning the Internet for possible SID receiver circuit diagrammes, in an attempt to improve what I currently use. I am using a homebrewed received based on a SEA receiver from the early seventies. This receiver consist of two tuned ferrite pot cores around an opamp,then into a two diode detector followed by a DC amp. Antennas are  DIP switch tuned amplified loops with a 75cm diameter

I am getting very good results from NWC on 19.8 kHz (9363 km) and good results from  NAA on 24.0 kHz (11461 km). But the question that came up in my mind is : now that solar activity is down and the easy flares are gone as well, is it possible to come up with  a "new" design that will still be technically possible,even in a far-off country like mine ?? I have tried the direct circuits using op-amps,ones with tunable inductors,superhets and even a SA612 DC receiver....... This may also be used for GRB detection ?? I am trying to get reception from VTX3 in India at 7555 km or possibly LeBlanc,France at 9100 km. Will I get "better" results if I tune to a more distant station or to a more local one ?

Unfortunately I have no contact with the other AAVSO SID monitor here in South Africa so I cannot confirm any results.

I am watching with interest any feedback !

Regards,

Francois Steyn
Villiersdorp
South Africa
A-102 
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