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Old 2012-03-23, 03:58   #2
mvs sarma
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Join Date: Apr 2007
Location: Hyderabad, India
Posts: 220
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i feel that the input preamp is needed at 455KHz. if the IF is different, perhaps you need to change the freq of resonator to make the output somewhere in the 10 to 15KHz as cetre point. the 12KHz output may have little more gain


finally i wonder that the dream has to be configured to accept mic input at 12KHz by selecting the suitable hardware.

all the best
PS: by model number, it appears that the 2nd if is 450KHz
the user manual is not clear whether the Fsockt behind (perhaps IF socket) outputs 450 or so KHz or converted 12KHz

ifg IF out is 450KHz, yopu need to use 465 or 467KHz resonator and try to pull it down to atleast 465 so that output would be 15KHz at the centre.
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Sarma
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Elektor SDR 5/07- Elektor Preselektor - Miniwhip Antenna of PA0RDT

Last edited by mvs sarma : 2012-03-23 at 05:15.
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