[Lowfer] XR4TN WSPR updates

[John Andrews]

I'm not sure that I agree with Jay on this one. Andy had directed his 
posting to "the US Lowfers", which would generally be interpreted as the 
guys doing stuff under Part 15 between 160 and 190 kHz. Given the low 
powers and lack of congestion, a number of us have run non-linear PA's. 
Among those doing PSK modes in that manner have been TAG (when in MA), 
NC, LEK, TEXAS (sniff...), XM, and VD.

But the caution should definitely apply at higher power levels.

John, W1TAG

On 1/13/2011 3:26 PM, jrusgrove at comcast.net wrote:
>> A final note on this post to the US lowFERs.. Getting a WSPR, or
>> Digi signal of any kind on 1750 meters is fairly simple.. An HF
>> Tranceiver, run thru a Transverter, and into the traditional
>> Complimentary Pair PA will get you going.. Something to think about:
>
>
> A non linear final (such as Class D complimentary pair) is not suitable for transmitting a "Digi
> signal of any kind". Non linear amplifiers can be used for frequency modulated signals likeWSPR,
> WSJT, RTTY, Navtex, MFSK etc ... but not for amplitude modulated signals like WOLF, PSK, QPSK etc.
>
> Jay W1VD  WD2XNS  WE2XGR/2
>
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