[hpsdr] PennyWhistle MOSFET's

[Helmut Oeller]

Not sure that you interpret TX display in Duplex mode correctly !?

73, Helmut

Am 10.11.2021 um 17:08 schrieb Riho B., ES7AAZ:
> Helmut, thanks for all tips and suggestions. Sure, I will take a look
> into it what's going on here. Fortunately I have a Pinocchio as well
> for  measurements and troubleshooting. Yes, the PowerSDR shows the
> signal how it's going out from DSP.  In Duplex mode it shows how the
> signal going out from the radio.
>
> --
> /73,/
> /Riho ES7AAZ/
>
>
> Kontakt Helmut Oeller (<dc6ny at gmx.de>) kirjutas kuupäeval K, 10.
> november 2021 kell 17:07:
>
>     Riho, don't give up! Penelope and Pennylane were (are) fine boards.
>     Search for the reason. Check as already suggested signal quality
>     at the
>     input of amp U6 (OPA2674), check 12V supply voltage for ripple
>     etc. and
>     output match (T2). When I recall correctly PowerSDR shows the
>     base-band
>     signal in TX mode and not the real output signal. Hence I would
>     recommend to use an external analyzer to evaluate the RF signal.
>
>     73, DC6NY
>
>
>
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>
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