[amsat-bb] Shack re-wiring: RTL-SDR options?

Zach Metzinger zmetzing at pobox.com
Thu Mar 2 22:56:28 UTC 2017

On 03/02/17 16:46, Greg D wrote:
> Hi folks,
> Has anyone used an RTL-SDR dongle on the 10.7 MHz IF output from another
> receiver?  Is that better than going direct?

I would hope (but perhaps not assume) that your R-7000's front-end is
better than the silicon tuner within the RTL dongle. The IF will already
have AGC applied to it, so overload of the dongle won't be a concern
once you get the level from the IF tap down to something that doesn't
over-range the dongle's AGC input on typical signals. That can be done
with a simple inline attenuator.

Here's some information about a hardware mod which allows "direct
sampling mode" on the dongle:


By doing this, you are essentially creating a Panadapter for the R-7000.

Let us know how it works!

--- Zach

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