[hpsdr] Penelope/Pennywhistle/Alex cabling

[n3evl]

Bruce,

Sounds like you've made good progress with Pennywhistle - any chance you 
could post some pics of the installation inside Pandora?

My Pandora is sitting here on the desk - I haven't yet removed all the 
screws to get access to the innards and determine where Pennywhistle 
will be placed - I figured I'd deal with that when finished with the 
amp.  Seeing a workable layout would certainly help.

FWIW, I always think of the area where Penny, Mercury, etc stick out 
from Pandora as the 'front.'

73, Pete, N3EVL


Bruce Beford wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Good afternoon all.
>
> I had some time this afternoon to work on integrating Pennywhistle into my
> Pandora box. As Graham suggested, I decided to mount it up against the
> "back" panel. (It seems strange to call that the back, but that's another
> matter...) I wired the DC power to the LPU, thru a 5 amp fuse. I added two
> wires to the back of Penelope'5 DB25 to bring the control signal and digital
> ground to Pennywhistle. I installed a 0 ohm jumper at position R5 on
> Penelope, to provide RF to the optional transverter jack. I fitted a
> right-angle SMA female jack there, facing back across the board.
> (alternatively, JP-1 (although labelled as a jumper, is available for
> internal RF out)
>
> It is my intention to use an SMA to BNC cable to send the low level RF on to
> Pennywhistle, and not use the "external" RF out BNC on Penelope. So far,
> this means I have kept all the cabling internal to the Pandora. Now... When
> Alex arrives, it does not appear that there is provision for an internal
> connector to the TX filter board. Is this correct? I can always just tack a
> pigtail on there, but was wondering if thought had been given during the
> design phase to accommodate an "internal" amp like Pennywhistle. Also, it
> looks as though the control cable for Alex will have to come out of the back
> of Mercury and fold back into the cabinet to get to Alex, yes? This may
> require some minor modification of the 3 board back panel that several of us
> have installed. Not a major problem, just musing on what will need to be
> done.
>
> I know that some if this is still some time away, as we wait for Alex, but I
> was curious how others are going to approach the RF path of using
> Pennywhistle as in internal RF amp with Alex.
>
> 73,
> Bruce N1RX
>
>
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