Well I suppose , its down to system noise ,
the E field mini-whip has the minimum amount
of components and the smallest foot-print , which means
, s/n degradation is minimal and it can be
located in a 'low noise' 'spot' , The loop
may have more active components and directivity -
catch 22 , gain may be from directivity . The
only other alternative is , very long low wires
I found on of the cheap usb dongles in direct
sample , gave -1 / -2 dB lower detection
level on 477 , that was looking into the Tx Ae via
the atu . a 477 band pass filter is
probably all it needs when used with a
mini-whip
with a mini-whip Ae , that minimises the
additional system noise and keeps everything nice and simple
.
73-G,
-1 set up is working well , -34
OP8 is better than average
Monitor: EB3FRN-1 Loc
JN01MC
Frequency: 0.477 MHz (600m)
Using: Opera v1.5.8/Rptr
V1.6
Antenna: Op8__~34dB
Show all seen by EB3FRN-1
Last report:
EA5DOM
at Tue, 29 Sep 2015 09:56:20 GMT
From: Iban
Cardona
Sent: Tuesday, September 29, 2015 10:53 AM
To:
[email protected] Subject: Re: LF: Re: 23:35 477 EA5DOM de EB3FRN
Op8 Deep Search -36 dB1489.0 Hz
Hi Graham,
First I have to
say that I live in a small town and is quiet zone. And at home and my shack I
cleaned all my RFI.
The loop es bit more quiet and directive, then the
signals should be over from 2 or 4dB better than the mini-whip in all the
periods at 477k. In some cases make the difference to receive or not receive
some station.
The active-antenna.eu loop have different setups.
Currently I'm using a single loop of two meters of diameter, using 1/2 inch
coax. It is located at the same height and zone of the mini-whip. But need
test another loop setups and sizes. I have to test the vertical symmetrical
short dipole too.
At 136 is working better the mini-whip, because as
the loop is oriented to Europa I'm loosing the VO1NA QRSS. I need more time to
see what is better at 136, and tests another setups too.
What is
better? Not easy to say... the loop works better, but not is omnidirectional and
can lose some stations.
73!
Iban
eb3frn
On Tue,
Sep 29, 2015 at 1:43 AM, Graham <
[email protected]>
wrote:
Ok Iban,
The question is , which is
the best ? difficult , both have the same
s/n , may be the mini-whip ? as
same s/n , more % fade , [more dropped bits] peak
signal must be higher ? or the qsb deeper
?
73-G,
From: Iban Cardona
Sent: Monday, September 28, 2015 8:04 PM
To:
[email protected]
Subject: Re: LF: Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB1489.0
Hz
Hi, Graaham
this the edata:
EB3FRN Afredi
netsdr + 2mt active loop
EB3FRN-1 ICOM R9000 +
mini-whip
73! Iban
eb3frn
On Mon, Sep 28, 2015
at 8:53 PM, Graham <
[email protected]>
wrote:
-1 Rx ?
18:51 477 PA3ABK de EB3FRN Op8 759 mi
-30 dB F:13% in MONTBRIO 1503.9 Hz with 0.5w + Marconi lin. loaded top 45m
total
18:51 477 PA3ABK de EB3FRN-1 Op8 759 mi -30 dB F:17% in MONTBRIO 1501.5
Hz with 0.5w + Marconi lin. loaded top 45m
total
From: Graham
Sent: Monday, September
28, 2015 6:37 PM
To:
[email protected] Subject: Re: LF: Re:
23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB1489.0 Hz
Ok Luis
Yes , had to be something 'loopy' going on , from
the levels , 25 watts should do the job then
, was the level 16 watts before ?
GL with
the vertical , if its locations is where I
think it will be : -) you may not
need the variometer , just a tapped coil and a
var-capacitor from a old valve Rx
Are you still
sending opera/wspr ? or just OP8 ,
no wspr spots showing during daylight to day ?
73-G,
2015-09-28 07:00 EA5DOM
0.475613 -28 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-28 02:00 EA5DOM
0.475612 -25 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-28 01:48 EA5DOM
0.475612 -24 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-28 01:36 EA5DOM
0.475612 -25 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-28 01:00 EA5DOM
0.475613 -26 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-27 23:12 EA5DOM
0.475613 -25 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-27 22:48 EA5DOM
0.475613 -26 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-27 22:36 EA5DOM
0.475613 -26 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-27 21:24 EA5DOM
0.475613 -27 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
2015-09-27 18:48 EA5DOM
0.475617 -25 0 IM98wn 0.002 EB3FRN
JN01mc 300 19
From: VIGILANT Luis Fernández
Sent: Monday, September 28, 2015 4:02 PM
To:
[email protected]
Subject: RE: LF: Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB1489.0
Hz
Hi Graham
The answer is ... QRO :)
I'm
running the 100w PA made by Fausto IK4NMF. Not big signal increase in local
(7km) decodes but
clear difference at 300Km as seen by
EB3FRN
After improving loop matching, PA works at full power.
Fortunately Opera8 keeps the PA almost cold
while a single WSPR-2 period is a
real stress test. Loop match is still far from perfect and stressing
full
power modes are not wellcome with this setup
As Stefan told,
keeping the loop tuned is an endless task and not the way to go for
QRO/Dx
Even worse for a flat horizontal loop like mine
Next in
the list is going vertical. Coil and variometer on the way. Keep tuned
;-)
73 de Luis
EA5DOM
Audacity of it ,
in board daylight as well
These are all
well above the Dynamic switch over level , Q question for
the propagation dep't , what's changed ?
local decode
levels still -5/-6 dB , but that path is
upto 6 dB less attenuation [ opera > dynamic s/n
still average and same
calibration]
73-G,
14:32 477 EA5DOM de EB3FRN Op8 -28 dB F:11%
in MONTBRIO 1482.9 Hz
14:20 477 EA5DOM de EB3FRN Op8 -27 dB F:8% in MONTBRIO
1482.7 Hz
14:08 477 EA5DOM de EB3FRN Op8 -29 dB F:8% in MONTBRIO 1482.9
Hz
13:56 477 EA5DOM de EB3FRN Op8 186 mi -28 dB F:8% in MONTBRIO 1482.4
Hz
13:56 477 EA5DOM de EA5DOM-1 Op8 4 mi -6 dB F:14% in Albir 1479,5
Hz
12:44 477 EA5DOM de EA5DOM-1 Op8 -5 dB F:9% in Albir 1479,5 Hz
12:44
477 EA5DOM de EB3FRN Op8 -30 dB F:13% in MONTBRIO 1482.7 Hz
From:
Iban Cardona
Sent: Sunday, September 27, 2015 1:08 AM
To:
[email protected] Subject: Re: LF: Re: 23:35 477 EA5DOM de EB3FRN
Op8 Deep Search -36 dB1489.0 Hz
Hi, Graham
copying to
G6AVK too, with nice signals
23:05 477 G6AVK Op8
1503.9 Hz -25 dB Fade: 2%
I attach a pict from my grabber where can
see EA5DOM and G6AVK at the same time
73!
Iban
eb3frn
On Sun, Sep 27, 2015 at 2:00 AM,
Graham <
[email protected]> wrote:
True Luis , just
like just like VW 'crazy' code :- )
Good
signals in the night to EB3FRM
!
73-G,
EA5DOM de SWL-EB3FRN (Spain): Op8 F:25% -28 dB in
MONTBRIO 1489.0 Hz
EA5DOM de SWL-EB3FRN (Spain): Op8 F:12% -32 dB in MONTBRIO
1488.5 Hz
From: VIGILANT Luis Fernández
Sent: Saturday,
September 26, 2015 4:18 PM
To:
[email protected] Subject: LF:
Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB1489.0 Hz
You
catched me Graham ! ;-)
Running the horizontal loop again. Better
matching to the PA than before, but only 8W now
I have continued
Txing WSPR and Opera8 during daylight hours. Nothing on WSPR-2 at EB3FRN
but
Opera is decodable at Deep Search. Turned on my monitor to confirm the spots and
then
the Deep Search spots marked as "??" go without question
marks
12:59 477 EA5DOM de EB3FRN Op8 Deep Search
-34 dB in MONTBRIO 1488.8 Hz
12:58 477 EA5DOM de EA5DOM-1
Op8 -5 dB F:13% in Albir
12:35 477 EA5DOM de EB3FRN Op8
Deep Search ?? -36 dB in MONTBRIO 1488.8 Hz
12:23 477
EA5DOM de EB3FRN Op8 Deep Search ?? -36 dB in MONTBRIO 1488.8
Hz
11:59 477 EA5DOM de EB3FRN Op8 Deep Search ?? -35 dB in
MONTBRIO 1488.8 Hz
Big difference over WSPR-2 and even taking in
consideration the higer QRM at EB3FRN
during daylight hours
73 de
Luis
EA5DOM
De:
[email protected]
[
[email protected]] en nombre de Graham
[
[email protected]]
Enviado: sábado, 26 de septiembre de 2015
1:40
Para:
[email protected]Asunto: LF: 23:35 477 EA5DOM de
EB3FRN Op8 Deep Search -36 dB1489.0 Hz
Jump in Opera activity
to day , with excellent conditions on 14 MHz
UK/EU<>VK
LF/MF - Note the PSK map ONLY
shows opera data decodes , Dynamic spots are routed via
the Opera APP
Good demonstration of running a local '
Rx on LF and MF by EA5DOM , only reaching EB3FRN in Dynamic , but
validated by the local off air time stamp and recovered average frequency ,
within 200 mHz , -36 dB is about the lower limit for
op8D
23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36
dB1489.0 Hz
23:34 477 EA5DOM de EA5DOM-1 Op8 -5 dB F:1%_End
in Albir
23:23 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB in1488.8
Hz
23:22 477 EA5DOM de EA5DOM-1 Op8 -5 dB F:1%_End in Albir
23:11 477
EA5DOM de EB3FRN Op8 Deep Search -36 dB in MONTBRIO 1488.8 Hz
23:10 477
EA5DOM de EA5DOM-1 Op8 -5 dB F:2% in Albir
Dynamic spots not
showing
21:24 136 RN3AGC de G3XDV Op32 Deep Search
-42 dB in Welwyn 1535.8 Hz
20:42 136 G3XDV de EW6BN
Op32 Deep Search 1204 mi -42 dB
20:37 136 IZ7SLZ de
SV8RV-4 Op32 Deep Search -41 dB
20:37 136 IZ7SLZ de G4WGT
Op32 Deep Search -42 dB
20:37 136 IZ7SLZ de SV8RV-1 Op32
Deep Search -42 d
73-G,
