[Elecraft] K3: DRM listening?

David Pratt david at g4dmp.fsnet.co.uk
Fri Dec 11 17:12:29 EST 2009


Could the 8.215MHz output from the IF OUT jack be fed to a simple mixer 
with a 8.203 or 8.227MHz crystal to provide a 12kHz i.f.?

I have used this method very successfully on the Sangean ATS-803A and 
Lowe HF-225 receivers with both DReaM v.1.6.1cvs and DRM Software Radio 
v2.0.38 programs.  But this was by converting the 455kHz i.f. to 12kHz.

David G3DMP

In a recent message, Lyle Johnson <kk7p at wavecable.com> writes
>
>In general, DRM decoders expect a receiver IF of 12 kHz and a bandwidth
>of up to 20 kHz.  The K3 can provide neither without modification.
>
>Some DRM modes are narrower and can be accommodated if the FM roofing
>filter (nominal 13 kHz) is installed.  But getting the IF output to the
>DRM decoder still requires modifications to the K3.
>
>Some DRM decoders are free, others require a licensing fee.
>
>WinDRM is different, being a mode designed for Amateur radio use,
>primarily for digital voice but also for file transfer.
-- 
David G4DMP
Leeds, England, UK





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