LF: Fw: New QRPPP test to night on WSPR 2 MF

[Guyé André <andre.guye1@aliceadsl.fr>]

HI ! Hello Luis and Graham, and thanks for your comments.

 

The limit here seems to be around 0.03 milli Watt (30 micro Watt) ERP. 2 days ago, I received only one report for my Txing all the night !

 

2015-04-25 22:44

F6CNI

0.475630

-24

0

JN19qb

0.001

PA0RDT

JO11tm

274

4

 

I was using only my home made TX mixer without the amplifier stage. Output from the MPF102 : 2 milli Watt. Including the antenna efficiency  : about 30 micro Watt ERP. See on photo the linear converter.

 

Antenna is a 75 meters long Inverted L, with base L tuner. Z_antenna = 15 – 610 j. Using oscilloscope, the RF voltage at the cold side of the tuning coil is only 0.43 Volts RMS !

 

I hope to copy you soon dear Luis. Best luck.

 

73 to all. F6CNI Andy – JN19QB.

 

 

 

From: VIGILANT Luis Fernández

Sent: Monday, April 27, 2015 5:21 PM

To: rsgb_lf_group@blacksheep.org

Subject: RE: LF: Re: New QRPPP test to night on WSPR 2 MF

 

Vey nice test Andy. Thank you for sharing your results

 

I'm also transmitting QRPPP (may be with one more "P") with just the Ultimate-3 connected to antenna

 

Have been using a vertical 11m high without coil. But last week I finally installed a 70m perimeter loop

and managed to get it tuned to 477KHz. On my monitor at 7Km I have imporved by 10dB with the loop

 

I'm transmitting WSPR-2 and Opera8. So far have got my first (and only) WSPR report from about 500Km

at David EA1FAQ. And last night got a few decodes from Iban EB3FRN

 

I don´t know which is my ERP. But can be probably well under 1mW  ??

 

Next step is an small 25W PA. But for the moment will keep on QRPPP

 

73 de Luis

EA5DOM

 

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De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de Roger Lapthorn
Enviado el: lunes, 27 de abril de 2015 11:06
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: Re: New QRPPP test to night on WSPR 2 MF

Congratulations. QRPPP is certainly fun and a real challenge for the RX stations.

73s

Roger G3XBM

 

On 25 April 2015 at 13:34, Guyé André <andre.guye1@aliceadsl.fr> wrote:

Muchas gracias Iban.

 

last 3 nights I tested 20, 1 and 0.1 milliwatt ERP. Here the results :

 

Date night	ERP mW	Total Spots received me	Total stations received me	Max QRB km
April 24 / 25	20	370	21	1284
April 25 / 26	1	45	9	730
April 26 / 27	0,1	19	5	587

 

To night, I’ll be QRV with 0,05 Watts ( 50 micro Watt).

 

Best 73 to all.

 

Andy F6CNI.

 

 

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F6CNI MF converter.jpg
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