[hpsdr] PennyWhistle - Call for Comments

[Kjell Karlsen]

I meant Penny and Mercury!

Kjell


På Sat, 07 Feb 2009 09:45:58 +0100, skrev Kjell Karlsen <la2ni at online.no>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Graham:
>
> Why not do the layout for both the BNC and the SMA? If you mount the SMA  
> connectors as they are on your first layout you can easily place the BNC  
> connectors of the same type as on Atlas and Mercury. You can even use  
> the same hole for the "hot" terminal.
>
> 73, Kjell LA2NI.
>
>
>
> På Sat, 07 Feb 2009 00:05:22 +0100, skrev Graham / KE9H  
> <KE9H at austin.rr.com>:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> All:
>>
>> Before I do a layout of the (hopefully) final
>> version of PennyWhistle, I would like to call
>> for comments.
>>
>> If this is something you would be interested in,
>> please review...
>>
>> http://hpsdr.org/wiki/index.php?title=PENNYWHISTLE
>>
>> It has been updated with an "off the shelf" output
>> transformer from Communications Concepts, as well
>> as the power output versus frequency plots have
>> been added.
>>
>> Questions:
>>
>> Do you prefer BNC versus the SMA connectors shown?
>>
>> Considering the differences in power output at
>> 6 Meters versus HF, should a relay be added that
>> would switch the output peaking between HF and
>> 6 Meters, or is the performance with a fixed
>> capacitor at one setting or the other adequate
>> for your purposes?   (that is, keep it simple)
>>
>> Is a bare board kit preferable if it saves multiple
>> months for availability?  Are you comfortable
>> building a kit with about two dozen SMT parts?
>>
>> I have a suggestion from Phil H to add a feedback
>> winding to (optionally) reduce gain and increase linearity
>> when used as a driver for linears.
>>
>> I have a suggestion from Lyle J. to try the RD15HVF1
>> in place of the RD16HFF1 transistors to increase
>> performance at 6 Meters.
>>
>> --- Graham / KE9H
>>
>> ==
>>
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>>
>
>
>



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