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Subject: Re: LF: good night on MF WSPR @G7NKS 1933km @ 50mW erp - winter plans
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Hello James.
Congrats your results on WSPR2 MF.
I just computed, using the EZNEC PRO V6.0 software, your antenna with =
the 52 Ohms base resistance part, an average soil in the Fraunhofer zone =
and 25 Watts output TX. Here the results :
=B7 Base antenna Z =3D 52 - 1300 j and 900 Volts RF RMS ;
=B7 F/B ratio 1.4 dB ;
=B7 Efficiency =96 21 dB, so about 200 mW ERP ;
=B7 Maxi lobe -18 dBi at 20=B0 site, so about 400 mW EIRP ;
=B7 Ibase =3D 0.7 A , Itop =3D 0.5 A , Total Amperes x meters =3D =
7.2 in the vertical wire.
=B7 To get 1 W EIRP, you need about 60 Watts output TX.
Note that results are exactly the same if you test the very very fb, =
easy to use and accurate =AB Antenna simulator =BB computed by rik ON7YD =
/ OR7T : http://www.472khz.org/pages/about-this-site.php
Best 73.
Andy.
From: James Cowburn=20
Sent: Sunday, September 25, 2016 9:11 AM
To: rsgb_lf_group@blacksheep.org=20
Subject: LF: good night on MF WSPR @G7NKS 1933km @ 50mW erp - winter =
plans=20
Prop'n seems to be improving. Iceland and Finland last night on MF, =
nearly 2000km on about 50mW ERP.
=20
Roll on the cold dark nights!
=20
Simple set up @ G7NKS
=20
IC706mk2g via current meter and home brew 7 pole LPF into coax out some =
15m to a tapped loading coil into an inverted L (12m high on a =
fibreglass telescopic pole and 30m top wire across roof)
=20
Earthing via a mish-mash of stakes & bonding to oil tank feeder pipe =
(buried) and some steel mesh under patio slabs and block paved drive.
=20
Checking via the RigExpert AA1000 analyser shows an impedance of 52 ohm =
and a return loss of -25dB @ 474.2khz. For the local IO92 and Newark =
Sunday morning net with G3XIZ, M0JXM, G3DXZ, G4GIR occasionally and =
M0FMT, we use around 473.3khz and this occassionally warrants a quick =
tap up or down by half a turn. Also when it rains like today, there's a =
tweak needed sometimes as the top wire capacitance to roof changes as it =
becomes more electrolytic and less air spaced!
=20
PC is a Dell Studio 1749 running WSPR 2.12.
=20
The IC706mk2G will run at about 25% max power on 472 so about 25w but =
not all of that is at 472 of course, I estimate I'm getting 50mW ERP =
using a very helpful spreadsheet/calc provided by Stefan. =20
=20
On a 15% duty cycle it all remains happily cool.
=20
It does have a tendency to fight with our cheap home broadband router =
supplied by British Telecom, resulting in the "Orange Light of Death" =
and subsequent grief from XYL and 2 teenagers as their Netflix/Music =
stream/Online gaming has just fallen over! Ferrite toroids have been =
spectacularly unsuccessful in remedying this. The best solution has =
been to try to run the CAT5 cables in my office as perpendicular to the =
coax feed and line of roof top wire as possible to minimise pick up and =
cross talk, but this hasn't really been that effective either.
=20
A bigger issue on Rx is the noise pick up from both Dell (genuine kit =
and not cheap copies either, which is annoying!) PSUs that feed the =
Studio and the XPS17 which is my main office PC. On batteries, I get =
about S1-3 of noise which is very good, but as soon as the PSU's are =
used and are under "load" then this rockets up to S7-9! If they are =
powered on, but not driving the laptops i.e. disconnected, then they =
have no impact. I'm wondering if it is the load that makes them =
noisier or whether the whole laptop acts as an augmented antenna when =
they are connected to it?
=20
I've tried putting them in shielded earthed metal boxes (biscuit tins!) =
with no effect. (biscuits were nice though!). Similarly, stacked =
ferrite toroids on the mains inputs and DC power out have had zero =
impact. They both have a very bright blue LED on the power cable =
whereas older units for my Dell D610/20 series did not have this =
"bauble" and were much quieter, but also were lower rated at 60W or 90W =
as opposed to these beasts which are around 120W to 150W, and run =
alarmingly warm at times!=20
=20
The Rx noise doesn't seem to affect my WSPR reception but it does impact =
on me hearing G3DXZ (Chas) from Newark on the Sunday Net, so for that I =
just run the show on batteries during the Rx overs.=20
=20
When I get "a round Tuit" I am going to follow the very detailed =
instructions from John in the US and feed the 706 into my recently =
acquired Hafler Transnova 3000 (approx 400w). Cheers John.
=20
While I will unlikely get 400W I suspect I might get 250W which is 10dB =
up on my current input power and hopefully about 500mW ERP and that may =
be enough to hop the pond.=20
=20
As for 137KHz and down=85=85.
=20
The 706 will generate a very weak signal at 137 probably only around 1mW =
but if I can get that into the Hafler then that=92s my net project, work =
and weather permitting. I acquired some coils from the SK estate of the =
late great G3ACQ and they will happily resonate my "L" onto LF.=20
=20
My other (better) plan is to use the 0dBm output on my Elad FDM Duo and =
a 1W broadband RF amp off Ebay to give me 1W output at 137 and feed =
that into the Hafler, so plenty to do.
=20
The ELAD will also go down to sub 9Khz on the 0dBm output so I may try =
to re-start my dreaming experiments and also try some of Roger G3XBM =
earth loop electrode arrangements
=20
The local 472 net nr to IO92ub will be on air from about 9am local today =
and most Sundays so feel free to join in!
=20
Chris G3XIZ is usually "Net Controller" and "chief documenter". =20
=20
Best 73s =20
=20
Jim
=20
=20
Dr. Jim Cowburn G7NKS IO92ub
=20
=20
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<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: 14pt">Hello =
James.</FONT></FONT></SPAN></P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: =
14pt"></FONT></FONT></SPAN> </P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: 14pt">Congrats your results on =
WSPR2=20
MF.</FONT></FONT></SPAN></P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: =
14pt"></FONT></FONT></SPAN> </P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: 14pt">I just computed, using =
the EZNEC PRO=20
V6.0 software, your antenna with the 52 Ohms base resistance part, an =
average=20
soil in the Fraunhofer zone and 25 Watts output TX. Here the results=20
:</FONT></FONT></SPAN></P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: =
14pt"></FONT></FONT></SPAN> </P>
<P class=3DMsoNormal=20
style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 =
lfo1; tab-stops: list 39.0pt"=20
align=3Djustify><SPAN=20
style=3D"FONT-FAMILY: ; mso-fareast-font-family: symbol; =
mso-bidi-font-family: symbol"><SPAN=20
style=3D"mso-list: ignore"><FONT face=3DSymbol><FONT=20
style=3D"FONT-SIZE: 14pt">=B7</FONT></FONT><SPAN=20
style=3D"FONT-FAMILY: ; LINE-HEIGHT: normal"><FONT=20
style=3D"FONT-SIZE: 7pt"> =20
</FONT></SPAN></SPAN></SPAN><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT=20
style=3D"FONT-SIZE: 14pt">Base antenna Z =3D 52 - 1300 j and 900 Volts =
RF RMS=20
;</FONT></FONT></SPAN></P>
<P class=3DMsoNormal=20
style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 =
lfo1; tab-stops: list 39.0pt"=20
align=3Djustify><SPAN=20
style=3D"FONT-FAMILY: ; mso-fareast-font-family: symbol; =
mso-bidi-font-family: symbol"><SPAN=20
style=3D"mso-list: ignore"><FONT face=3DSymbol><FONT=20
style=3D"FONT-SIZE: 14pt">=B7</FONT></FONT><SPAN=20
style=3D"FONT-FAMILY: ; LINE-HEIGHT: normal"><FONT=20
style=3D"FONT-SIZE: 7pt"> =20
</FONT></SPAN></SPAN></SPAN><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT=20
style=3D"FONT-SIZE: 14pt">F/B ratio 1.4 dB ;</FONT></FONT></SPAN></P>
<P class=3DMsoNormal=20
style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 =
lfo1; tab-stops: list 39.0pt"=20
align=3Djustify><SPAN=20
style=3D"FONT-FAMILY: ; mso-fareast-font-family: symbol; =
mso-bidi-font-family: symbol"><SPAN=20
style=3D"mso-list: ignore"><FONT face=3DSymbol><FONT=20
style=3D"FONT-SIZE: 14pt">=B7</FONT></FONT><SPAN=20
style=3D"FONT-FAMILY: ; LINE-HEIGHT: normal"><FONT=20
style=3D"FONT-SIZE: 7pt"> =20
</FONT></SPAN></SPAN></SPAN><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT=20
style=3D"FONT-SIZE: 14pt">Efficiency =96 21 dB, so about 200 mW ERP=20
;</FONT></FONT></SPAN></P>
<P class=3DMsoNormal=20
style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 =
lfo1; tab-stops: list 39.0pt"=20
align=3Djustify><SPAN=20
style=3D"FONT-FAMILY: ; mso-fareast-font-family: symbol; =
mso-bidi-font-family: symbol"><SPAN=20
style=3D"mso-list: ignore"><FONT face=3DSymbol><FONT=20
style=3D"FONT-SIZE: 14pt">=B7</FONT></FONT><SPAN=20
style=3D"FONT-FAMILY: ; LINE-HEIGHT: normal"><FONT=20
style=3D"FONT-SIZE: 7pt"> =20
</FONT></SPAN></SPAN></SPAN><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT=20
style=3D"FONT-SIZE: 14pt">Maxi lobe -18 dBi at 20=B0 site, so about 400 =
mW EIRP=20
;</FONT></FONT></SPAN></P>
<P class=3DMsoNormal=20
style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 =
lfo1; tab-stops: list 39.0pt"=20
align=3Djustify><SPAN=20
style=3D"FONT-FAMILY: ; mso-fareast-font-family: symbol; =
mso-bidi-font-family: symbol"><SPAN=20
style=3D"mso-list: ignore"><FONT face=3DSymbol><FONT=20
style=3D"FONT-SIZE: 14pt">=B7</FONT></FONT><SPAN=20
style=3D"FONT-FAMILY: ; LINE-HEIGHT: normal"><FONT=20
style=3D"FONT-SIZE: 7pt"> =20
</FONT></SPAN></SPAN></SPAN><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT=20
style=3D"FONT-SIZE: 14pt">Ibase =3D 0.7 A , Itop =3D 0.5 A , Total =
Amperes x meters =3D=20
7.2 in the vertical wire.</FONT></FONT></SPAN></P>
<P class=3DMsoNormal=20
style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 =
lfo1; tab-stops: list 39.0pt"=20
align=3Djustify><SPAN=20
style=3D"FONT-FAMILY: ; mso-fareast-font-family: symbol; =
mso-bidi-font-family: symbol"><SPAN=20
style=3D"mso-list: ignore"><FONT face=3DSymbol><FONT=20
style=3D"FONT-SIZE: 14pt">=B7</FONT></FONT><SPAN=20
style=3D"FONT-FAMILY: ; LINE-HEIGHT: normal"><FONT=20
style=3D"FONT-SIZE: 7pt"> =20
</FONT></SPAN></SPAN></SPAN><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT=20
style=3D"FONT-SIZE: 14pt">To get 1 W EIRP, you need about 60 Watts =
output=20
TX.</FONT></FONT></SPAN></P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: =
14pt"></FONT></FONT></SPAN> </P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: 14pt">Note that results are =
exactly the=20
same if you test the very very fb, easy to use and accurate =AB Antenna =
simulator=20
=BB computed by rik ON7YD / OR7T : <A=20
style=3D'href: "http://www.472khz.org/pages/about-this-site.php"'=20
href=3D"http://www.472khz.org/pages/about-this-site.php"><FONT=20
style=3D"face: =
calibri">http://www.472khz.org/pages/about-this-site.php</FONT></A></FONT=
></FONT></SPAN></P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: =
14pt"></FONT></FONT></SPAN> </P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: 14pt">Best =
73.</FONT></FONT></SPAN></P>
<P class=3DMsoNormal align=3Djustify><FONT =
face=3DCalibri></FONT> </P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: "><FONT =
face=3DCalibri><FONT style=3D"FONT-SIZE: =
14pt">Andy.</FONT></FONT></SPAN></P>
<P class=3DMsoNormal align=3Djustify><SPAN style=3D"FONT-FAMILY: =
"></SPAN> </P>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV style=3D"FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A =
title=3Djim.cowburn@outlook.com=20
href=3D"mailto:jim.cowburn@outlook.com">James Cowburn</A> </DIV>
<DIV><B>Sent:</B> Sunday, September 25, 2016 9:11 AM</DIV>
<DIV><B>To:</B> <A title=3Drsgb_lf_group@blacksheep.org=20
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
</DIV>
<DIV><B>Subject:</B> LF: good night on MF WSPR @G7NKS 1933km @ 50mW erp =
- winter=20
plans </DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">Prop'n seems to be =
improving. =20
<st1:country-region w:st=3D"on">Iceland</st1:country-region> and=20
<st1:country-region w:st=3D"on"><st1:place=20
w:st=3D"on">Finland</st1:place></st1:country-region> last night on MF, =
nearly=20
2000km on about 50mW ERP.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">Roll on the cold dark=20
nights!<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">Simple set up @=20
G7NKS<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">IC706mk2g via current =
meter and home=20
brew 7 pole LPF into coax out some 15m to a tapped loading coil into an =
inverted=20
L (12m high on a fibreglass telescopic pole and 30m top wire across=20
roof)<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">Earthing via a mish-mash =
of stakes=20
& bonding to oil tank feeder pipe (buried) and some steel mesh under =
patio=20
slabs and block paved drive.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">Checking via the RigExpert =
AA1000=20
analyser shows an impedance of 52 ohm and a return loss of -25dB @=20
474.2khz. For the local IO92 and Newark Sunday morning net =
with=20
G3XIZ, M0JXM, G3DXZ, G4GIR occasionally and M0FMT, we use around =
473.3khz and=20
this occassionally warrants a quick tap up or down by half a turn. =
Also=20
when it rains like today, there's a tweak needed sometimes as the top =
wire=20
capacitance to roof changes as it becomes more electrolytic and less air =
spaced!<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">PC is a Dell Studio =
1749 =20
running WSPR 2.12.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">The IC706mk2G will run at =
about 25%=20
max power on 472 so about 25w but not all of that is at 472 of course, I =
estimate I'm getting 50mW ERP using a very helpful spreadsheet/calc =
provided by=20
Stefan. <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">On a 15% duty cycle it all =
remains=20
happily cool.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">It does have a tendency to =
fight=20
with our cheap home broadband router supplied by British Telecom, =
resulting in=20
the "Orange Light of Death" and subsequent grief from XYL and 2 =
teenagers as=20
their Netflix/Music stream/Online gaming has just fallen =
over! =20
Ferrite toroids have been spectacularly unsuccessful in remedying =
this. =20
The best solution has been to try to run the CAT5 cables in my office as =
perpendicular to the coax feed and line of roof top wire as possible to =
minimise=20
pick up and cross talk, but this hasn't really been that effective=20
either.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">A bigger issue on Rx is =
the=20
noise pick up from both Dell (genuine kit and not cheap =
copies=20
either, which is annoying!) PSUs that feed the Studio and the XPS17 =
which is my=20
main office PC. On batteries, I get about S1-3 of noise which is very =
good, but=20
as soon as the PSU's are used and are under "load" then this rockets up =
to=20
S7-9! If they are powered on, but not driving the laptops i.e.=20
disconnected, then they have no impact. I'm wondering =
if it is=20
the load that makes them noisier or whether the whole laptop acts as an=20
augmented antenna when they are connected to =
it?<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">I've tried putting them in =
shielded=20
earthed metal boxes (biscuit tins!) with no effect. (biscuits were nice=20
though!). Similarly, stacked ferrite toroids on the mains inputs =
and DC=20
power out have had zero impact. They both have a very bright blue =
LED on=20
the power cable whereas older units for my Dell D610/20 series did not =
have this=20
"bauble" and were much quieter, but also were lower rated at 60W or 90W =
as=20
opposed to these beasts which are around 120W to 150W, and run =
alarmingly warm=20
at times! <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">The Rx noise doesn't seem =
to affect=20
my WSPR reception but it does impact on me hearing G3DXZ (Chas) from =
<st1:city=20
w:st=3D"on"><st1:place w:st=3D"on">Newark</st1:place></st1:city> on the =
Sunday Net,=20
so for that I just run the show on batteries during the Rx overs.=20
<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">When I get "a round Tuit" =
I am going=20
to follow the very detailed instructions from John in the =
<st1:country-region=20
w:st=3D"on"><st1:place w:st=3D"on">US</st1:place></st1:country-region> =
and feed the=20
706 into my recently acquired Hafler Transnova 3000 (approx=20
400w). Cheers John.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">While I will unlikely get =
400W I=20
suspect I might get 250W which is 10dB up on my current input power and=20
hopefully about 500mW ERP and that may be enough to hop the pond.=20
<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">As for 137KHz and=20
down=85=85.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">The 706 will generate a =
very weak=20
signal at 137 probably only around 1mW but if I can get that into the =
Hafler=20
then that=92s my net project, work and weather permitting. I =
acquired some=20
coils from the SK estate of the late great G3ACQ and they will happily =
resonate=20
my "L" onto LF. <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">My other (better) plan is =
to use the=20
0dBm output on my Elad FDM Duo and a 1W broadband RF amp off Ebay =
to give=20
me 1W output at 137 and feed that into the Hafler, so plenty to=20
do.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">The ELAD will also go down =
to sub=20
9Khz on the 0dBm output so I may try to re-start my dreaming experiments =
and=20
also try some of Roger G3XBM earth loop electrode=20
arrangements<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">The local 472 net nr to =
IO92ub will=20
be on air from about 9am local today and most Sundays so feel free to =
join=20
in!<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">Chris G3XIZ is usually =
"Net=20
Controller" and "chief documenter". <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial">Best 73s =20
<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT size=3D2 face=3DArial><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial"><o:p></o:p></SPAN></FONT> </P>
<P class=3DMsoNormal=20
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT =
size=3D5=20
face=3D"Freestyle Script"><SPAN lang=3DEN-US=20
style=3D'FONT-SIZE: 18pt; FONT-FAMILY: "Freestyle =
Script"'>Jim</SPAN></FONT><FONT=20
face=3DArial><SPAN lang=3DEN-US=20
style=3D"FONT-FAMILY: arial"><o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal=20
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT =
size=3D3=20
face=3DArial><SPAN lang=3DEN-US=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =
arial"> <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal=20
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT =
size=3D3=20
face=3DArial><SPAN lang=3DEN-US=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =
arial"> <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal=20
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT =
size=3D2=20
face=3DArial><SPAN lang=3DEN-US style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
arial">Dr. Jim=20
Cowburn G7NKS IO92ub</SPAN></FONT><FONT =
face=3DArial><SPAN=20
lang=3DEN-US style=3D"FONT-FAMILY: arial"><o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal=20
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT =
size=3D3=20
face=3D"Times New Roman"><SPAN lang=3DEN-US=20
style=3D"FONT-SIZE: 12pt"> </SPAN><o:p></o:p></FONT></P>
<P class=3DMsoNormal><FONT size=3D3 face=3D"Times New Roman"><SPAN=20
style=3D"FONT-SIZE: =
12pt"><o:p></o:p></SPAN></FONT> </P></DIV></DIV></DIV></DIV></BODY><=
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