[Boatanchors] Comarison?

[Michael Tauson]

On Fri, Dec 18, 2009 at 11:11 AM, Ian Wilson <ianmwilson73 at gmail.com> wrote:
> My set of choices, not related to particular receivers:
>  - low-gain pentode RF amplifier/attenuator, can be bypassed

No bypass but a definite manual gain control.

>  - beam deflection mixer

Check

>  - dual conversion, tunable first IF (not the best choice for highest
>    front end performance but constant tuning rate, VFO stability, etc,
>    are appealing)
>  - 1st IF around 5MHz, second IF 455kHz (filters, etc, are cheap)

1st IF around 9 MCs and 500 KCs wide.  Easy to design, build and sweep
to tune.  No extra stages that have to track the VFO.

>  - 500kHz segments

Sounds good.

>  - 455kHz SSB filter / audio CW filter

Yep.  (well, 455 or 500 KCs.)  This is where all the filtering takes
place which allows the 1st IF to be broad.

>  - audio-derived AGC

Sounds about right

>  - simple noise blanker. Notch filter

And a peak filter.  Both independent.

Next?

Best regards,

Michael, WH7HG
-- 
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http://wh7hg.blogspot.com/
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Hiki Nô!