Re: LF: EA5DOM back to MF, but QRP at the moment

[VIGILANT Luis Fernández <luis@vigilant.es>]

Done

2,33V RMS over 50 ohm load. Should be 0,108w. 20dBm aprox ??

The antenna at Opera QRG is working on the bottom side of the Smith chart at 36 -39j

I can measure 2,60V RMS with the antenna connected

Let's see which are the spots during the night with this conditions, say 20dBm applied to antenna, not ERP

73 de Luis

EA5DOM

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De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] en nombre de VIGILANT Luis Fernández [luis@vigilant.es]
Enviado: domingo, 29 de noviembre de 2015 21:27
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EA5DOM back to MF, but QRP at the moment

Not bad in Opera Deep Search so far

Real decode, as proved with my own monitor decode one minute earlier

19:47    477 EA5DOM de EI8JK Op8 Deep Search 1632 km -36 dB in Bantry, South West Ireland 1520.5 Hz

19:46    477 EA5DOM de EA5DOM Op8 0 km -1 dB F:1%_End in Albir 1519,0 Hz

And much shorter in WSPR, as exected

2015-11-29 20:00	EA5DOM	0.475608	-29	0	IM98wn	0.05	F6GEX	IN97na	942	357
2015-11-29 20:00	EA5DOM	0.475610	-16	0	IM98wn	0.05	F1AFJ	JN06ht	919	4
2015-11-29 20:12	EA5DOM	0.475610	-16	0	IM98wn	0.05	F1AFJ	JN06ht	919	4

I'm going to measure the output power of U3. Just curious ! ;-)

73 de Luis

EA5DOM

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De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] en nombre de VIGILANT Luis Fernández [luis@vigilant.es]
Enviado: domingo, 29 de noviembre de 2015 20:30
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EA5DOM back to MF, but QRP at the moment

Hi Graham, MF

Good idea. Let's see where is the imit

I have just connected the U3 directly to antenna. Have not measured power yet but may be under 500mW

I'm not using the 3xBS170 but a mosfet driver instead, ICL7667 if I can recall correctly

Spots in WSPR dropped to just the EA monitors

73 de Luis 

EA5DOM

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De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] en nombre de Graham [g8fzk@g8fzk.fsnet.co.uk]
Enviado: sábado, 28 de noviembre de 2015 21:53
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EA5DOM back to MF, but QRP at the moment

Hi Luis

 

Nice going  for  5  watts,  but  -8 dB  with  75 % of the  signal  recovered ,  your  nearly  +30 over the  limit .. can you drop the  power down by  20 dB ?  say 50 mW ??

 

73-G,

 

20:46 477 EA5DOM de G3XKR Op8 -8 dB F:24% in BIDEFORD Devon

20:34 477 EA5DOM Op8 1520.0 Hz -28 dB |---------- - -- | Fade: 15%

20:23 477 EA5DOM Op8 Deep Search -35 dB 1520.0 Hz

20:22 477 SO5AS Op8 1496.1 Hz -27 dB |------------| Fade: 3%

20:10 477 EA5DOM Op8 1519.8 Hz -29 dB |---------- | Fade: 7%

 

From: VIGILANT Luis Fernández

Sent: Saturday, November 28, 2015 8:22 PM

To: rsgb_lf_group@blacksheep.org

Subject: LF: EA5DOM back to MF, but QRP at the moment

Hi MF

Back home !

Antenna is up again and I' transmitting with only 5W from a small PA

I will take the opportunity to install the 100W PA in the terrace, as originally planned

Txing WSPR and Opera8 every 12 minutes

73 de Luis

EA5DOM