[hpsdr] Penelope T2 orientation - additional info

n3evl n3evl at townisp.com
Sat Nov 14 08:11:04 PST 2009


Bruce made some interesting observations with respect to the correct 
orientation of the transformer (T2).  Irrespective of the actual power 
measurements, it seems to depend on a) the pin numbering on the 
schematic being correct and b) the correct identification of pin 1 on 
the component.  I'd really like to know the definitive answer here 
since, with Pennywhistle almost completed,  I waited until _yesterday_ 
to reverse T2 as per the errata!  Here's hoping I don't have to re-reverse!

Pete, N3EVL


Graham / KE9H wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Bruce:
>
> That is about the typical performance for a Penelope, with the output
> transformer oriented correctly.  It will be about 3 dB lower with the
> transformer reversed.
> --- Graham / KE9H
>
> ==
>
>
> Bruce Beford wrote:
>> All PA gain settings at 38.8
>>
>> Max Penelope output with tune drive at 100 is about 120-150 mW on 6M, 
>> about
>> 350 mW on 10M. Readings from powerSDR display consistant with external
>> calibrated meter.
>>
>> Bruce N1RX
>>
>>   
>
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