Re: LF: QRSS30 QRPp beacon approx 137.770kHz - reports appreciated

[Gary - G4WGT <g4wgt@tiscali.co.uk>]

Hi Roger, Stefan & All,

You will see now that my 137kHz grabber is back on (bottom grab) :-

http://myweb.tiscali.co.uk/wgtaylor/grabber2.html

I have had a sound card go down & since fitting a replacement I had some serious local interference problems. All cleared except for the 504 to 510kHz grab.

Roger is a good signal at the moment.

73,

Gary - G4WGT.

2011/5/5 Stefan Schäfer <schaefer@iup.uni-heidelberg.de>

Hello Roger,

You may put the circuit in a waterproof plastic bag and put in the the center of a water filled backet. Then it is sourrounded by a high thermal capacity and should drift much slower :-) Shouldn't be a problem for a QRP device...

73, Stefan/DK7FC

Am 05.05.2011 18:21, schrieb Roger Lapthorn:

Hi Stefan (et al)

Using the readout I have (nearest 10Hz on my FT817 and IC703) it is very close to 137.770kHz by zero beating the signal. It would be helpful to get a semi-local with accurate frequency calibration to confirm the exact frequency. I may try measuring the offset from one of the strong commercial signals and see if I can get a closer figure although I am going away for a week so this will have to wait until I get back.

QRSS60 would be too wobbly with the crystal/divider arrangement I currently have. Even QRSS30 was marginal (wobbly) with G3WCB and PA3CPM. At the moment the beacon board is just sitting on the desk in the open air and I suspect the crystal frequency moves a few Hz (before division) as I wave my arms typing this. There is also temperature drift as the PA keys on. All can be much improved.

F1AFJ is not in the best direction for the loop antenna, but I am an optimist.

73s
Roger G3XBM

2011/5/5 Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>

Hello Roger,

What means close? Is it above 770 so i am looking for you :-) Maybe the first RX stations can confirm the actual frequency, if unknown so far.

73, GL, Stefan

PS: QRSS60 would be more useful for all the grabbers. I see a goog chance that you can appear at F1AFJ!


Am 05.05.2011 15:27, schrieb Roger Lapthorn:

My QRSS30 50uW beacon XBM (space then G3XBM at 10wpm) is now active on its new frequency close to 137.770kHz until 2300z this evening. As always, reports and screen shots would be very much appreciated.

If trying to copy it, very best of luck.

73s
Roger G3XBM

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http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/

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http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/