[hpsdr] TAPR Kits

[AA8K73 GMail]

Hi Harry,


For receiving on HF, you would probably want to
have bandpass filtering, hence the Alexiares
project.

For transmitting, the Alexiares provides a low-pass
filter for up to 100 watts, I think, and antenna
switching.



Both Mercury and Penelope have on-board oscillators.
Excalibur has an on-board TCXO with better performance
than the Mercury or Penelope oscillators.

For the obsessed, Excalibur can take an external sine
or square wave 10 MHz signal, squares the wave shape,
and injects it into the Atlas bus.  This can be from
a GPS Disciplined Oscillator or atomic standard.
I use a Trimble Thunderbolt GPSDO and can measure
in the tenths of a Hertz for FMTs.  The Mercury,
due the limited number of bits involved and some
manipulations inside the down conversion scheme,
the actual frequency will be some fraction of a
Hertz different from the indicated frequency,
so it takes some interpretation.


Mike - AA8K


Harry A wrote:
> 
> If I go with existing TAPR kits, am I correct in thinking I need the 
> following:  (including of course, the case and power supply)
> 
> Atlas
> Magister
> Mercury (If I go with the bare board, are all parts currently available 
> for me to put it together myself??  Does the TAPR PCB kit come with 
> schematics and parts lists??)
> 
> I understand these kits will give me a complete receiver??  Would that 
> receiver compare favorably with the Kenwood TS-480 for instance??  My 
> initial thought would be it would be better just due to filtering if 
> nothing else??
> 
> Do I "need" something like the Excalibur?
> 
> 
> 
> For a complete transmitter, I would need:
> Penelope (this comes from Germany only?) I see them on eBay.
> Pennywhistle 
> 
> Would I need Alexiares??
> 
> 
> Thanks again for all the help
> 
> 73
> 
> Harry  KD0LQE
> 

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