[600MRG] ARC5 Receiver on 630m Question

[lstoskopf at cox.net]

I have a couple and they work.  Has anyone done a Sherwood type analysis of them as a high dynamic range RX?

N0UU

> On August 3, 2021 at 4:32 PM DANA MYERS <k6jq at comcast.net> wrote:
> 
>      
> 
>         > >         On 08/03/2021 1:36 PM Dwight Blevins via 600MRG <600mrg at mailman.qth.net> wrote:
> >          
> >          
> >         I've been tempted to buy one of those China
> > 
> > 
> >         ATS-25 dsp receivers
> > 
> >         just to see how it performs. Goes down to about 150 khz. One of the eBay stores threw me an offer of $99.00, free shipping. I passed. Think I'll wait to see what gets posted in the online reviews. Great price but I'm a bit skeptical.......KW7T
> > 
> >     >     These inexpensive receivers use the SiLabs Si4732 receiver chip, which is remarkably good. The same family of chips has AM/FM broadcast receivers which are at the heart of many AM/FM portables (most of the modern Sangeans, for example).
>      
>     Silicon Labs did some very clever tricks in these receivers; for one, they auto-tune the AM BCB loopstick using an internal capacitor array (you can tell when this happens if you listen with another receiver at the same frequency, you hear a burst of pulses as it auto-tunes). The receiver automatically changes internal clock rates so that internally-generated birdies are always removed from the passband, so on.
>      
>     The Si4732 receiver is really very good.
>      
>     73,
>     Dana  K6JQ
>      
> 




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