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361. Re: LF: WSPR without an SSB TRX ? FRM Joe Taylor NPwinner (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 7 Apr 2010 21:53:11 +0100
Not quite sure what you're trying to suggest...   There is no 'magic' to a phase continuous oscillator.   Any single oscillator whose frequency is controlled by adjusting the frequency determining el
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-04/msg00464.html (19,520 bytes)

362. Re: LF: WSPR without an SSB TRX ? (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 7 Apr 2010 13:29:47 +0100
If you want a stanadalone beacon then    http://www.g4jnt.com/beacons.htm  gives info on WSPR transmission, and includes PIC code for controlling an AD9852 DDS and transmitting a pre-stored WSPR mess
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-04/msg00541.html (12,284 bytes)

363. Re: LF: Probably not a new question... (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 26 Apr 2010 22:15:03 +0100
I find the SDR-IQ a superb little box, and is better than any comms reciver I've used over the years.   And that applies especially to several professional, including early generation digital, receiv
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-04/msg00566.html (16,257 bytes)

364. Re: LF: Re: OT Stupid CrimINals (score: 1)
Author: Andy Talbot <[email protected]>
Date: Thu, 27 May 2010 20:00:14 +0100
Why does no one ever bother to correct mis-spelt headers ? Andy www.g4jnt.com On 27 May 2010 19:55, Roger Lapthorn <[email protected]> wrote: What's the point of running this sort of power on H
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-05/msg00027.html (12,083 bytes)

365. Re: LF: ROS 503.600kHz beacon (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 2 May 2010 20:44:14 +0100
How is any mode 'illegal' - apart from in the US where their national organisation seems to have self regulated thenselves to extremes.   ROS is not a "Secret Code or Cipher", its decodable by off-th
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-05/msg00037.html (13,443 bytes)

366. Re: LF: 8.97kHz - Near field test by ear: The "human factor" (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 28 May 2010 21:13:24 +0100
Only to those of a,  errr, well, somewhat younger age.    800Hz to decent speakers,  and its a different matter....   Mind you, listening to a teenagers car just gone past, a few tens-Hz of bass-boom
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-05/msg00074.html (15,117 bytes)

367. LF: G4JNT Webpage reworked (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 30 Apr 2010 23:20:18 +0100
Tnx to someone who shall remain anonymous making carping noises (as is his wont), my website, that had become extremally overwhelming and top-heavy , has now been made more streamlined.  So it should
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-05/msg00223.html (9,109 bytes)

368. LF: G4JNT 500kHz Beacon (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 14 May 2010 10:03:44 +0100
My 503.7 / 503.875kHz beacon has moved onto a restricted transmitting schedule. From today, it is operated on a timer that comes on at 2000z running the Tx overnight, and switches off at 0500z.   Dur
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-05/msg00278.html (10,152 bytes)

369. Re: LF: G3XIZ (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 23 May 2010 08:01:15 +0100
I have adjusted the timer on my beacon to transmit between 2100z to 0500z.  http://www.g4jnt.com/beacons.htm http://www.g4jnt.com/500khz_Beacon.pdf WSPR on 503875Hz 7 sessions / hour;   multi functio
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-05/msg00407.html (13,250 bytes)

370. Re: LF: G4WGT web site. (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 26 May 2010 21:18:10 +0100
The Faulty Mouse link doesn't work Andy www.g4jnt.com On 25 May 2010 21:36, Gary - G4WGT <[email protected]> wrote: Hi All, My web site has been updated giving a completely new look at :- http://my
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-05/msg00497.html (11,093 bytes)

371. Re: LF: Re: 137.500 kHz ROS beacon (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 21 Jun 2010 19:11:47 +0100
That is a bandwidth thing. As CW is the widest mode used on LF, perhaps that's the one that should be restricted, while data modes go anywhere.   Andy www.g4jnt.com On 21 June 2010 19:06, mal hamilto
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00019.html (25,428 bytes)

372. Re: VLF: Strong drifting carrier on VLF! (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 28 Jun 2010 20:35:49 +0100
Who's been reading too many conspiracy theory websites ?   Try Googling TETRA and see what they've come up with.   16Hz radiation,  16MHz radiation, Government mind control. Andy www.g4jnt.com On 28
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00230.html (13,230 bytes)

373. Re: LF: 137kHz transmitters (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 25 Jun 2010 18:36:47 +0100
A pair of old fashioned  74xx161 devices (inverter needed, too)   Hardwire a preset loaded values of (256 - N), it counts up from that and reloads the preset value when the count rolls over from 255
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00239.html (11,038 bytes)

374. Re: LF: Re: 137 Revival (score: 1)
Author: Andy Talbot <[email protected]>
Date: Tue, 22 Jun 2010 21:02:52 +0100
see   http://www.g4jnt.com/137tx.pdf    for another big one.   Andy www.g4jnt.com On 22 June 2010 20:04, James Moritz <[email protected]> wrote: Dear Tony, LF Group, What you need for a 13
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00282.html (16,700 bytes)

375. Re: LF: :Haggis in Scotland - Point of View (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sat, 26 Jun 2010 18:51:56 +0100
The mass produced ones availalble from (some) supermarkets are very tasty Andy www.g4jnt.com On 26 June 2010 16:21, Uwe Wensauer <[email protected]> wrote: If You visit Scotland as a foreigner, Hag
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00321.html (13,089 bytes)

376. Re: LF: 1.9kHz earth-mode tests today (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 16 Jun 2010 22:58:44 +0100
Make a crystal calibrator.  See RadCom  December 2009   Page 50 Andy www.g4jnt.com On 16 June 2010 22:03, Roger Lapthorn <[email protected]> wrote: Today I modified my 4W VLF transmitter so it
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00344.html (11,839 bytes)

377. Re: LF: 137kHz transmitters (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 25 Jun 2010 23:11:00 +0100
A circuit diagram of the divider using a pair of 74xx161 devices can be seen in the top left of  www.g4jnt.com/UWLOLCK2.GIF     But as others have pointed out, you'll probably need a 50% duty cycle s
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00428.html (12,272 bytes)

378. Re: LF: Re: AW: Problems with RSGB LF reflector (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 28 Jun 2010 10:38:14 +0100
yes, I agree.    Yahoo groups has become very efficient now, and the option of being able to download a digest, look at all in one go or have individual ones forwarded is invaluable in allowing the w
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00515.html (18,086 bytes)

379. Re: LF: QRO / QRP (score: 1)
Author: Andy Talbot <[email protected]>
Date: Tue, 1 Jun 2010 14:34:25 +0100
Unfair to microwavers.:-(   At 10GHz that's 14 microns by 28um by 42um long Andy www.g4jnt.com On 1 June 2010 14:13, Rik Strobbe <[email protected]> wrote: Hello Ha-Jo, interesting approach
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00630.html (13,093 bytes)

380. Re: LF: Prototype for QRSI (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 28 Jun 2010 10:39:50 +0100
It is slow Hell !   http://www.g4jnt.com/IEEPaper.pdf   Andy www.g4jnt.com On 28 June 2010 10:11, Rick Wakatori <[email protected]> wrote: Hi Horst  This is a hardware including a microproces
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00656.html (15,675 bytes)


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