70094Re: What's the most TX power anyone has amplified an RXTX to? Just out of curiosity...
- Nov 16, 2012Alan, was that me? KK4DCF. I think it was and didn't realize that was you on the chat there.
I'm completely new to this so there are quite a few "unknown unknowns" to get through. You can rest easy though, I think I'm done trying to get on the air.
--- In firstname.lastname@example.org, "Alan" <alan4alan@...> wrote:
> ----- Original Message -----
> Subject: [softrock40] Re: What's the most TX power anyone has amplified an RXTX to? Just out of curiosity...
> Another related question may be "What is the largest spurious signal transmitted from a Softrock, (or other SDR)."
> On WSPR "Chat" the other day I came across someone who was transmitting without having checked his TX IQ was correct. Transmitting
> on the wrong frequency.
> He also knew nothing about setting TX IQ balance so when the IQ was set correctly his image may have been only 25dB down.
> If he had a fault he could have been transmitting simultaneously on both frequencies without knowing. The same as "mirrored"
> A good understanding of what is involved is necessary before amplifying mistakes. Any soundcard SDR transmitter needs careful
> setting by someone who at least understands the basics. A receiver must be used to check.
> I sometimes wonder when immediately after building a Softrock somebody says "I want more power". It took me quite a while to get a
> fair understanding of the Softrock and software.
> 73 Alan G4ZFQ
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