[hpsdr] HPSDR(Mercury, Pannylane, adn Metiz) and PowerSDR version

[Riho B., ES7AAZ]

Helmut,

P.S. BBC 4 speakers are on 198kHz AM in Europe and their quality is superb.
It's always good to listen the native english speakers, HI.

P.P.S. Just kidding.
--
*73,*
*Riho ES7AAZ*
*www.qrz.com/ES7AAZ <https://www.qrz.com/db/ES7AAZ>*


Kontakt Riho B., ES7AAZ (<es7aaz at gmail.com>) kirjutas kuupäeval N, 21.
oktoober 2021 kell 14:16:

> Hi Helmut,
>
> yeah, 2400Hz SSB TX is a kind of overkill, I switched back to 2700Hz SSB
> TX. Today I had a 20m QSO with LA3XIA. He was very amazed that I'm running
> only 16W into vertical delta loop. He gave me 59, but there was QSB and he
> said, "You have a very good quality signal, even if the signal drops down
> to 55 it sounds like 59+20". It's a quite heavy, but still good compression
> (CFC) what does that. In short, PowerSDR mRX does a great job in low TX
> power configuration.
>
> Take care, CU!
> --
> *73,*
> *Riho ES7AAZ*
> *www.qrz.com/ES7AAZ <https://www.qrz.com/db/ES7AAZ>*
>
> Kontakt Riho B., ES7AAZ (<es7aaz at gmail.com>) kirjutas kuupäeval K, 20.
> oktoober 2021 kell 16:55:
>
>> Hi Helmut,
>>
>> yes, the conventional PC electret microphone is what I'm using here. It's
>> quite cheap one, but gives very good overall SSB results. However, W1AEX
>> using higher end external audio system there via VAC.
>>
>> --
>> *73,*
>> *Riho ES7AAZ*
>>
>> Kontakt Helmut Oeller (<dc6ny at gmx.de>) kirjutas kuupäeval K, 20.
>> oktoober 2021 kell 16:12:
>>
>>> Hi Riho,
>>>
>>> the approach is certainly ok, however allow me two remarks:
>>>
>>> That mentioned 2,7 kHz is the *net* bandwidth, i.e. difference between
>>> the lower edge and the upper edge of the audio spectrum. No problem to use
>>> 100 - 2800 Hz.
>>>
>>> Each microphone has an individual frequency response. This 'input'
>>> can/will significantly modify these praised W1AEX profiles. All HPSDR stuff
>>> applies the TI audio codec TLV320 with a 14 kohms input resistance. This
>>> device is developed in particular for high impedance electret microphones
>>> and each mismatch (e.g. with dynamic mic) deforms the frequency response
>>> dramatically. New adjustment is always advisable.
>>>
>>> 73, Helmut, DC6NY
>>>
>>>
>>
>
>
>
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