[hpsdr] Penelope T2 orientation - additional info

[Graham / KE9H]

Bruce:

To the extent that the transformer does not present 75 Ohms to U6,
the answer is yes.  It is a 1.5 to 1 impedance ratio transformer, so
it will present more like 33 Ohms (differential load) to U6.

I have not personally looked at the load variation tolerance of U6
run in this configuration.  Penelope seems to be well behaved
into loads close to 50 Ohms.  The circuit is very similar to the output
stage of the basic FlexRadio-1000.

--- Graham / KE9H

==

Bruce Beford wrote:
>
> Then this is OPPOSITE from the published schematics for Penelope, and means
> that T2 does not present a 75 ohm impedance to U2 when it is feeding a 50
> ohm load. Based on David Poole's analysis of the power handling capablity
> for U6, this has ramifications for the maximum load tolerance of Penelope.
>
> Bruce N1RX
>
>   


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