Re: [IRCA] Re: Radio Marti 1710

["Mike Westfall, Lost Almost NM" <mwdx@xxxxxxxxxx>]

Glenn Hauser wrote:

> No, as I have explained several times before, if the receiver IF is 450 kHz,
> here`s how the image works: 1710 x 3 = 5130. 5130 + (2 x 450) = 6030, a regular
> R. Martà frequency (Glenn Hauser, DX LISTENING DIGEST)

That's kind of convoluted. I can't imagine how the signal would go 
through that kind of mathematical process in the receiver.

This makes more sense:
6030 - (2 x 2160) = 1710, where 2160 is the local oscillator freq when 
the radio is tuned to 1710 (2160 - 1710 = 450).

The LO apparently needs to be LPF'd to get rid of harmonics.

--
Mike Westfall, N6KUY, WDX6O
Los Alamos, NM (DM65uv)
Online logbooks at http://dxlogbook.gentoo.net

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