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161. Re: LF: FLDIGI IN FLARQ MODE OLIVIA 250 x 8 503 CENTRE FREQ (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 1 Feb 2009 18:50:16 +0000
Copy abt 50% of your transmission, but its weak and much QRM. Tried replying, but not sure how to "connect". Just replied manually using MultiPSK Andy G4JNT www.g4jnt.com
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00236.html (11,203 bytes)

162. Re: LF: Ultra pico-low-power WSPR beacon (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sat, 21 Feb 2009 22:41:39 +0000
Now running 100% duty cycle 503.870kHz Andy G4JNT www.g4jnt.com
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00245.html (9,957 bytes)

163. LF: NoV Extensions (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 25 Feb 2009 14:16:46 +0000
Has everybody had their 500kHz NoV extensions yet, or am I the only one not to receive it ? Until 23:59:59 2009/02/28 I hope to have the WSPR beacon running each evening and overnight on 503.870kHz 2
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00300.html (9,102 bytes)

164. LF: WSPR Spots (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 20 Feb 2009 22:11:11 +0000
According to the WSPR Spot database, there is some "interesting" DX being received chez GM4ISM. Is there some carrier or coherent QRM present to generate these false hits? Just got a WSPR generating
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00321.html (9,607 bytes)

165. Re: LF: WE2XGR/2 WSPR (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 1 Feb 2009 22:17:34 +0000
First decode of the evening here. 14 minutes after the first one yesterday. Conditions are much noiser than they were then. Very impulsive broadband noise covering tens of kHz with durations of 10s t
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00322.html (12,600 bytes)

166. Re: LF: Wanted - non-random PN sequence generator - so Off Topic it shouldn't be allowed here! (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sat, 21 Feb 2009 19:15:56 +0000
Scott: Its precisely that an LFSR does not give what is needed that made me start thinking along these lines. For one thing, LFSRs are only random if considered over the whole repeat length, viz 2 ^
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00326.html (14,226 bytes)

167. LF: LF Antennas - back to basics (score: 1)
Author: Andy Talbot <[email protected]>
Date: Thu, 26 Feb 2009 16:16:38 +0000
Having now been encouraged by being decoded now by at least two US stations, was wondering how much improvement in efficiency I could scrape out of my existing antenna. It is a Marconi Tee, the verti
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00377.html (12,788 bytes)

168. Re: LF: WE2XGR/2 WSPR (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 2 Feb 2009 07:29:16 +0000
Heavy snow (by our standards!) in S England, so took the opportunity to not bother going into work and to carry on logging. The signal has been pretty consistent at -20dB +/- 4 since switch-on at 064
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00391.html (11,671 bytes)

169. LF: Ultra pico-low-power WSPR beacon - now 37dB up (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 22 Feb 2009 08:51:01 +0000
Not unsurprisingly, nothing heard during the night at the -2dBm RF power level. Just put a 3W amp into circuit to test it - which will explain the few hits now being seen with the 37dB power increase
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00408.html (9,455 bytes)

170. LF: 600W PA (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 13 Feb 2009 17:43:52 +0000
SRI folks, the 600 Watt PA has now been sold. ...and to the several who asked if it would go at 500kHz, the answer is 'No'. At least as it stood; the transformers would have to be rewound with 3 - 4
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00478.html (8,878 bytes)

171. LF: WSPR again (score: 1)
Author: Andy Talbot <[email protected]>
Date: Tue, 24 Feb 2009 15:24:09 +0000
I'll be running the WSPR beacon again tonight, from around 1900 UTC - or perhaps a little earlier. Frequency 503.870kHz centre, 33% duty cycle (based on a 32 frame repeat cycle). There's a CW ident a
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00487.html (9,271 bytes)

172. LF: Wanted - non-random PN sequence generator - so Off Topic it shouldn't be allowed here! (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sat, 21 Feb 2009 09:40:47 +0000
...but if any mathematicians, number theorists or cryptographers should be reading this... I've just got a WSPR generating routine running on a PIC / AD9852 / GPS combination, but I'm looking for a h
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00494.html (10,871 bytes)

173. LF: 600 Watt HF PA module For Sale (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 11 Feb 2009 18:10:22 +0000
Before I investigate the intricacies of Ebay for the first time... http://www.g4jnt.com/ForSale/600Watt_PA.htm Andy G4JNT www.g4jnt.com
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00511.html (8,990 bytes)

174. Re: LF: RE: New NOV (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 18 Feb 2009 20:26:11 +0000
Are they being automatically extended, or is reapplication necessary ? Andy G4JNT www.g4jnt.com
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-02/msg00519.html (11,541 bytes)

175. Re: LF: Re: Re: Multi-function beacon (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 13 Mar 2009 20:37:53 +0000
Its going continuously, although I suspect I'll have to turn it off when I'm not around such as weekday day times - unattended beacons are not permitted it seems!   Certainly will be going all weeken
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-03/msg00003.html (19,882 bytes)

176. Re: LF: RE: Syncback software QQQ (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 18 Mar 2009 20:52:08 +0000
If timing slips, the averaged power will be out by the amount of slippage.  So, for a 1 second error the total power summed over the window is 4/5, or about 1dB down.   For 2.5s slippage, -3dB   BUT.
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-03/msg00007.html (15,037 bytes)

177. Re: LF: RE: Syncback software (score: 1)
Author: Andy Talbot <[email protected]>
Date: Tue, 17 Mar 2009 16:27:39 +0000
That should have read http://www.g4jnt.com/PCBCN.zip Andy  G4JNT www.g4jnt.com 2009/3/17 Andy Talbot <[email protected]> Try http://www.g4jnt.com/beacons.htm    and go to  PCBCN at the bottom
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-03/msg00028.html (13,048 bytes)

178. Re: LF: AW: 503.7 Multi-function beacon ... Its working ! (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 8 Mar 2009 18:26:54 +0000
It is no trouble to continue the transmission.  I have set up the equipment in the garage where it does not get in the way of other shack activites, and won't do too much damage if the euipment blows
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-03/msg00039.html (33,064 bytes)

179. Re: LF: Re: Re: Multi-function beacon (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sat, 14 Mar 2009 16:56:42 +0000
Nothing happens here - the systems just carries on as usual.   Its noticable that during those periods, the signal drops to the daytime groundwave level.   Blame the sun :-) Andy  G4JNT www.g4jnt.com
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-03/msg00044.html (25,954 bytes)

180. LF: Re: Multi-function beacon (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 13 Mar 2009 10:57:23 +0000
Just a reminder to all - this beacon is still going, and will probably continue to do so until further notice.   A few listeners have downloaded the software, and thanks to all (you know who your are
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-03/msg00050.html (16,711 bytes)


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