[hpsdr] Question about modules

[Graham Haddock]

All:

Penelope running barefoot is legal without harmonic filters.
However, it only puts out about 1/2 watt.

Any additional RF Power Amplifier that you put between
Penelope and the antenna will most likely need harmonic
filtering.  This could be built into the amplifier, or ALEX
could be used for harmonic filtering.

As far as ALEX being needed for Mercury, read the
discussion on the Wiki.  If you don't use ALEX, then
you likely will still need some filtering to block any nearby
AM broadcast transmitters, and any nearby VHF-FM and
VHF-TV broadcast.  It really depends on the
situation.  In a benign environment, you might not need
any input filtering at all, or perhaps your receive antenna
has sufficient selectivity by itself.

--- Graham / KE9H

Greg Clark wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Mike,
>
> So we don't don't necessarily need a Janus board?
>
> And is Penelope going to be useful without Alex?
>
> -- Greg
>
> On Tue, Mar 25, 2008 at 7:50 AM, Mike Naruta <mnaruta at comcast.net> wrote:
>   
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hello Disong Yu,
>>
>>
>> Here is what I plan:
>>
>>
>> Atlas - the "motherboard" that holds the other
>> cards and uses a standard PC power supply.
>> You must solder the parts yourself, but it is
>> not difficult.  This board supplies power and
>> connectors for the other boards.  Available now.
>>
>> OZYmandias - interface module that "talks" to
>> your PC on USB 2.0.  Available now.
>>
>> Mercury - receiver, available later in 2008.
>>
>> Penelope - exciter, 0.5 watts output.  Shipping
>> in June 2008.
>>
>> Alexiares (Alex) - RF Bandpass Filters for
>> transmit and receive; one board for transmit
>> and one board for receive.  Available later
>> in 2008.
>>
>>
>> The above, plus the software on a PC will allow
>> a transceiver.
>>
>>
>> I hope to add:
>>
>> Gibraltar - precision frequency standard.  The
>> project shows no activity since 2007/February,
>> unknown availability.
>>
>> Thor - RF power amplifier.  The project shows no
>> activity since 2007/March, unknown availability.
>>
>>
>>
>> The development web site is:  < http://hpsdr.org >
>>
>> The TAPR web site for purchase is:  < http://www.tapr.org/ >
>>
>> A supporting site is:  < http://www.hamsdr.com/ >
>>
>>
>>
>> 73,
>>
>> Mike - AA8K
>>
>>
>>
>> Disong Yu wrote:
>>     
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> Hi everyone,
>>>
>>>   I'm new to this list,and am new to SDR also.
>>>   Anyone can tell me the minimum modules of HPSDR which I need to buy to
>>> form the complete radio?
>>>   Thanks!
>>>
>>>       
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