[hpsdr] PennyWhistle - Call for Comments

[Kjell Karlsen]

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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