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From: Laurence KL1 X <hellozerohellozero@hotmail.com>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Date: Sun, 3 Feb 2013 10:45:22 -0900
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Subject: LF: 817 drift
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Roger - I had the same drift issue and added the txco with little improveme=
nt - best was when unit was powered driven by lower voltage - think mine is=
 set around 9.6V at the moment and less heat..it also sits in the cool gara=
ge...think Dex also found the same

Laurence KL 1 X

Date: Sun=2C 3 Feb 2013 19:23:35 +0000
From: rogerlapthorn@gmail.com
To: rsgb_lf_group@blacksheep.org=3B rsgb_lf_group@yahoogroups.co.uk
Subject: LF: WSPR15 - sort of success

After several attempts Tom G8HUH managed to decode my WSPR15 transmission o=
n 137.607kHz this evening. As the FT817 was drifting around 4Hz in the 15 m=
inute TX slot with the FT817 on 1837.607kHz (I was using a stabilised sig g=
en for the LO at 1.7MHz)=2C I think this was messing up the decodes as Tom =
only gave me -32 and -34dB S/N whereas I have been getting some 6dB BETTER =
than this with the WSPR2 transmissions.


If WSPR15 is going to succeed for me I need a more stable rig (or a 0.5ppm =
TXCO fitted to the FT817) or a fan to force cool the FT817 - even when runn=
ing 500mW!

I'll leave the rig on for a little while longer=2C but will probably revert=
 to WSPR2 for the rest of the evening.


Thank you Tom G8HUH=2C and Trevor G0KTN=2C for working with me for the last=
 couple of hours to get this as good as I could.

73s
Roger G3XBM

--=20
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
https://sites.google.com/site/sub9khz/

http://qss2.blogspot.com/
http://www.youtube.com/user/G3XBM


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<body class=3D'hmmessage'><div dir=3D'ltr'>
Roger - I had the same drift issue and added the txco with little improveme=
nt - best was when unit was powered driven by lower voltage - think mine is=
 set around 9.6V at the moment and less heat..it also sits in the cool gara=
ge...think Dex also found the same<br><br>Laurence KL 1 X<br><br><div><div =
id=3D"SkyDrivePlaceholder"></div><hr id=3D"stopSpelling">Date: Sun=2C 3 Feb=
 2013 19:23:35 +0000<br>From: rogerlapthorn@gmail.com<br>To: rsgb_lf_group@=
blacksheep.org=3B rsgb_lf_group@yahoogroups.co.uk<br>Subject: LF: WSPR15 - =
sort of success<br><br><div dir=3D"ltr"><div><div><div><div>After several a=
ttempts Tom G8HUH managed to decode my WSPR15 transmission on 137.607kHz th=
is evening. As the FT817 was drifting around 4Hz in the 15 minute TX slot w=
ith the FT817 on 1837.607kHz (I was using a stabilised sig gen for the LO a=
t 1.7MHz)=2C I think this was messing up the decodes as Tom only gave me -3=
2 and -34dB S/N whereas I have been getting some 6dB BETTER than this with =
the WSPR2 transmissions.<br>
<br></div>If WSPR15 is going to succeed for me I need a more stable rig (or=
 a 0.5ppm TXCO fitted to the FT817) or a fan to force cool the FT817 - even=
 when running 500mW!<br><br></div>I'll leave the rig on for a little while =
longer=2C but will probably revert to WSPR2 for the rest of the evening.<br=
>
<br></div><div>Thank you Tom G8HUH=2C and Trevor G0KTN=2C for working with =
me for the last couple of hours to get this as good as I could.<br></div><d=
iv><br></div>73s<br></div>Roger G3XBM<br clear=3D"all"><div><div><div><div>=
<div>
<div><br>-- <br><div dir=3D"ltr"><a saprocessedanchor=3D"true" href=3D"http=
://g3xbm-qrp.blogspot.com/" target=3D"_blank">http://g3xbm-qrp.blogspot.com=
/</a><br><a saprocessedanchor=3D"true" href=3D"http://www.g3xbm.co.uk" targ=
et=3D"_blank">http://www.g3xbm.co.uk</a><br><a saprocessedanchor=3D"true" h=
ref=3D"https://sites.google.com/site/sub9khz/" target=3D"_blank">https://si=
tes.google.com/site/sub9khz/</a><br>
<a saprocessedanchor=3D"true" href=3D"http://qss2.blogspot.com/" target=3D"=
_blank">http://qss2.blogspot.com/</a><br><a saprocessedanchor=3D"true" href=
=3D"http://www.youtube.com/user/G3XBM" target=3D"_blank">http://www.youtube=
.com/user/G3XBM</a><br><br></div>
</div></div></div></div></div></div></div></div> 		 	   		  </div></body>
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