Re: LF: PA0 into Alaska 600m

[Andy Talbot <andy.g4jnt@googlemail.com>]

All designs & ideas for a 1kW+ Class E PA gratefully accepted :-)

I do have a 50V 25A PSU, so it 'might' even be feasible.

 

Two big meaty FETs in parallel may cope.    There's an article in the latest QEX, just arrived, that appears to run class E stages in parallel - but its part of another concept, not targetted at high power per-se.

 

Andy
www.g4jnt.com

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2010/1/11 Rik Strobbe <rik.strobbe@fys.kuleuven.be>

I just had a look at the WSPR database an condx must have been excellent last night:
PA0A can not only copied by KL1X in Alaska (7066km) but also by KL1X/5 in Texas:

2010-01-11 03:20   PA0A   0.503899   -27   0   JO33de   5   KL1X/5   EM26ar   7546   302

Counting the "uniques" there were 3 paths of +7000km: gold for PA0A-KL1X/5 (7546km), silver for WD2XSH/10-DL4RAJ (7378km) and bronze for PA0A-KL1X (7066km).
Further 10 paths in the 6000-7000km range and 16 paths in the 5000-6000km range.

TA crossings west to east:
WD2XSH/10 was copied by 9 Europeans (best DX DL4RAJ = 7378km)
WD2XSH/17 was copied by 9 Europeans (best DX DL4RAJ = 6251km)

TA crossings east to west:
PA0A was copied by 6 Americans (best DX KL1X/5 = 7546km)
M0BMU was copied by 3 Americans (best DX WA3USG = 5792km)
SM6BHZ was copied by 2 Americans (best DX W1VD = 5935km)
G4JNT was copied by 1 American (best DX W1VD = 5437km)

Also:
There were 23 spots of PA0A by WD2XSH/17 and 14 spots of WD2XSH/17 by PA0A, a 2 way WSPR QSO would have been possible.
Maybe also for M0BMU - WD2XSH/17 (15 / 8 spots)

Another remarkable thing:
Last night I had 16 spots of WD2XSH/10 (6225km) and "only" 6 spots of WD2XSH/17 (5598km)
Both claim the same ERP (2 Watt)

73, Rik  ON7YD - OR7T

At 04:06 11/01/2010, you wrote:

2010-01-11 02:54   PA0A   0.503899   -25   0   JO33de   5   KL1X   BP51ip   7066   347
 
 
PAOA into Alaska on WSPR 600m
 
Really awful night up in Alaska too - 60 knot winds from the North.
 
73
 
Laurence KL 1 X
(remote ops)

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