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Date: Tue, 14 Aug 2007 08:09:37 -0500
From: WE0H <we0h@yahoo.com>
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Subject: Re: LF: QRP Experiments
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Status: O

Hi John,

What distance was that QSO with Finbar & what antennas do you guys run? 
Lightning static is causing us lots of trouble here in the USA on 505kc. 
It is usually 40/9 noise floor as we keep getting thunderstorms across 
the country every night.

Many thanks,
Mike
WE0H
WD2XSH/16
WD2XGI

John Pumford-Green GM4SLV wrote:
> LF,
> 
> Last night, after the UK's best DX 500kHz QSO so far between G3OLB and 
> GM4SLV (unless anyone knows differently!) I went on to have a QSO of 
> over 1 hour with Finbar, GI4DPE, starting at approx 22:00 UTC
> 
> Conditions were much better than previous nights, with less QRN/Static 
> crashing.
> 
> After initial reports at our normal power levels we each progressively 
> reduced output power.
> 
> I copied Finbar, reading normal CW by ear, at 250mW RST339 and just got 
> bits at 100mW, say 229
> 
> He copied my 1W okay - his WinRadio reporting S0.7 (fractional 
> S-meter..!) Further reductions were uncalibrated as I have no 
> sensitive "QRP" power meter to verify my next reduction, but went 
> to somewhere close to 500mW and Finbar successfully copied, and sent 
> back to me, a sequence of 4 random numbers I sent (1498 from memory) at 
> this power level.
> 
> The low QRN levels obviously helped.
> 
> At a rough guess (extrapolating from previous measurements at 5W and 
> above) my antenna current at that power would be around 90mA, 
> for an estimated ERP of around 2mW!
> 
> Conditions were pretty good last night, but despite calling CQ after 
> finishing with Finbar I heard no other stations before retiring to bed 
> at 00:45 Local time.
> 
> Regards,
> 
> John GM4SLV