[hpsdr] PennyWhistle MOSFET's

[Riho B., ES7AAZ]

In Duplex there is only 15cm coax and opened T/R relay here  So, no Mercury
overdrive, more likely underload.

--
*73,*
*Riho ES7AAZ*

Kontakt Helmut Oeller (<dc6ny at gmx.de>) kirjutas kuupäeval K, 10. november
2021 kell 18:20:

> 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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