[hpsdr] penny/pennywhistle

[Graham / KE9H]

Geoff:

The exact wire size is not critical.  The bigger the better, as long as two
pieces twisted together will still fit through the hole in the ferrite.

--- Graham

==

On 11/6/2011 2:53 AM, Geoff wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
> Hi Graham et al,
> 	I checked out Penny carefully, set it up properly (thanks Phil) and it's
> good. With reasonable power now available I checked the input SWR of
> Pennywhistle as per the manual. T1 on Pennywhistle passed that test. It thus
> appears that I somehow screwed up the wiring/winding of T2. Given that it's
> Sunday evening, I'm getting hungry and I don't have any #22 wire repairs will
> have to wait. Can anyone recommend a suitable metric equivalent to #22?
> 	Thanks for the help I've received thus far :-).
>
> 73 de Geoff vk2tfg.
>
>
> On Sun, 6 Nov 2011 12:38:34 am Graham / KE9H wrote:
>> Geoff:
>>
>> It sound like the RF amplifier transistors in PennyWhistle are
>> biasing up fine.  Recheck the wiring of, and in particular the
>> directions of the windings in T1 and T2.
>>
>> --- Graham
>>
>> On 11/5/2011 2:14 AM, Geoff wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> Hi guys,
>>>
>>> 	I am presently trying to get my completed Rx/Tx setup going. On Tx I
>>> have a problem (or 2, dunno). My unmodified TAPR Penny is putting out the
>>> expected power level. Pennywhistle has been setup as per the manual. I am
>>> getting much lower power levels than i should. Most bands give me between
>>> 400 and 600 mW, 10m gives me 1.5W. 6m gives less. Penny whistle draws a
>>> maximum of about 2A on 10M. My aimless fiddling with gain and drive
>>> levels in powersdr gave some small improvements but nothing significant.
>>> Any attempt to run the PA calibration routines results in powersdr
>>> throwing a wobbly over invalid calculated gain. I am transmitting via
>>> Alex into a Bird 82C dummy load (overkill I know)
>>> 	Any ideas you can give me to get my HPSDR system up and running properly
>>> on Tx would be much appreciated by this frustrated numpty :-).
>>>
>>> 73 de Geoff vk2tfg.
>>> _______________________________________________
>>>


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