From: "jrusgrove@comcast.net" <jrusgrove@comcast.net>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
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 <CAL-VeeMHmAWKyyaEkYLw+FgQuikE5VVPwrNdnPSvB4AcVw+K7A@mail.gmail.com>
 <CAL-VeeNA73-H+DOPdDeQ2H+74_F9Tv5gFp6psTXtUVEKWWuv_Q@mail.gmail.com>
Date: Sat, 19 Jan 2019 06:30:56 -0500
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 <CAL-VeeNA73-H+DOPdDeQ2H+74_F9Tv5gFp6psTXtUVEKWWuv_Q@mail.gmail.com>
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Subject: LF: EbNaut
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Alex, Riccardo & EbNaut-eers

Unfortunately no copy of either station last night. Alex ... understan=
d your TX=20
frequency may have been moving around.

I wonder if a 1 hour transmission is too long for 137 kHz? Recalling=20=

spectrograms of QRSS going back many years seems to indicate a QSB pat=
tern of=20
approximately 15 - 30 minutes. Both receptions of IZ7SLZ and IW4DXW (a=
 while=20
back) were 'one and done' with no hint of the signal in adjacent time =
slots ...=20
using 30 minute transmission times. Even=20
DK7FC's normally big signal shows big QSB swings from one half hour pe=
riod to the next. Can't=20
help but wonder if 20 or 30 minute transmission periods make better us=
e of the=20
QSB characteristics on 136 kHz.

Comments?

Jay W1VD     =20

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<DIV>Alex, Riccardo &amp; EbNaut-eers</DIV>
<DIV>&nbsp;</DIV>
<DIV>Unfortunately no copy of either&nbsp;station last night. Alex ...=
 understand&nbsp;your TX frequency may have been moving around.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I wonder if a 1 hour transmission&nbsp;is too long for 137 kHz?&n=
bsp;Recalling spectrograms of QRSS going back many years seems to indi=
cate a QSB pattern of approximately 15 - 30 minutes. Both receptions o=
f IZ7SLZ and IW4DXW (a while back) were 'one&nbsp;and done' with no hi=
nt of the signal in adjacent time slots ... using 30 minute transmissi=
on times.&nbsp;Even&nbsp;DK7FC's&nbsp;normally big signal shows big QS=
B swings from one half hour period to the next. Can't help but wonder =
if 20 or 30 minute transmission periods make better use of the QSB cha=
racteristics on 136 kHz.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Comments?</DIV>
<DIV>&nbsp;</DIV>
<DIV>Jay W1VD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</DIV></BODY></HTML>

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