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Re: LF: R7NT WSPR15

To: [email protected]
Subject: Re: LF: R7NT WSPR15
From: DK7FC <[email protected]>
Date: Sun, 13 Sep 2015 18:04:02 +0200
In-reply-to: <[email protected]>
References: <[email protected]om>, <[email protected]> <[email protected]> <[email protected]> <[email protected]>
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Hi Jay,

I think the guard ring above the upper winding of the coil lost its contact to this winding. So it was floating. Or, the contact was loose so there was a small arc that started to burn that ring down so the structure became more and more inhomogenious, from a E-field view. Well, at least it worked very well since 2011!
I want to get even better results after the maintenance. There is some
room for improvements: The diameter / length ratio has never been
optimal on that coil. I want to check if it's possible to build a double
layer coil, at least a few of the upper windings... Effort but
interesting :-)
73, Stefan

Am 13.09.2015 15:35, schrieb [email protected]:
Stefan

Any idea what started the meltdown?

Heard someone say once: There are two types of LF ops ... those that have experienced fires ... and those that will ;~) .
Jay W1VD  WD2XNS  WE2XGR/2


----- Original Message ----- From: "DK7FC" <[email protected]>
To: <[email protected]>
Sent: Sunday, September 13, 2015 9:16 AM
Subject: Re: LF: R7NT WSPR15


Hi LF,

Unfortunately my LF coil got damaged during transmitting a few weeks ago. I'm soon repairing the coil and hope to join the 2200m band then again.
https://dl.dropboxusercontent.com/u/19882028/LF/20150910_193005.jpg
https://dl.dropboxusercontent.com/u/19882028/LF/20150910_192916.jpg
https://dl.dropboxusercontent.com/u/19882028/LF/20150902_182551.jpg

73, Stefan

Am 13.09.2015 15:02, schrieb Mike Dennison:
Alex was also a good signal with me when he sent Opera 32 last night.

Mike, G3XDV
==========


Hi Alex,



sorry my WSPR is on strike, no uploads.

Made it now manually.



1745 -35 1.1 0.137603 0 R7NT KN97 53

1800 -32 1.1 0.137603 0 R7NT KN97 53

1815 -35 -0.2 0.137604 0 UT7GH KN66 20

1845 -36 1.5 0.137603 0 R7NT KN97 53

1900 -34 1.5 0.137603 0 R7NT KN97 53



73 Joe






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