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181. Re: LF: DL-SWL and WOLF (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 4 Jan 2016 21:05:32 +0000
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00067.html (15,237 bytes)

182. Re: Re: LF: DL-SWL and WOLF (score: 1)
Author: Andy Talbot <[email protected]>
Date: Tue, 5 Jan 2016 11:08:38 +0000
Also posted to the Yahoo Group... I 've just been looking at the WOLF-GUI software, and see its more up to date than I seem to recall.   Once you delve deeper into its setup, it provides all the faci
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00079.html (18,609 bytes)

183. Re: LF: A new mode? (score: 1)
Author: Andy Talbot <[email protected]>
Date: Tue, 5 Jan 2016 20:11:33 +0000
Not new.. WSQ or FSQ  at a guess http://www.qsl.net/zl1bpu/MFSK/FSQweb.htm Andy  G4JNT On 5 January 2016 at 19:47, DK7FC <[email protected]> wrote: Hi LF, Just found this on my grabber, see atta
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00087.html (10,483 bytes)

184. Re: LF: Decca 5501 (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 8 Jan 2016 18:50:02 +0000
Does anybody know what ferrite grade is used on the fet driver transformer. I have had one burn out and have rebuilt it but would like to redesign it with better isolation between windings. Have tri
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00145.html (11,870 bytes)

185. LF: Linear Amp for LF (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 8 Jan 2016 21:45:23 +0000
Are there any proven reliably designed LF amplifier designs power amplifiers  for 137 / 475?   Wideband, covering both ideally    Rated for at least 300 Watts output, and ideally a lot more. I saw G3
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00152.html (9,880 bytes)

186. LF: Re: [rsgb_lf_group] Linear Amp for LF (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sat, 9 Jan 2016 09:47:39 +0000
  Hi Terry.   Ask away...You have almost read my mind.......   I've been looking at the class D circuit in detail over the past few weeks....FETs obsolete....SWR detector not quite right etc. I've e
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00164.html (26,181 bytes)

187. LF: Re: [rsgb_lf_group] Linear Amp for LF (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sat, 9 Jan 2016 22:13:29 +0000
  Hi Terry.   Ask away...You have almost read my mind.......   I've been looking at the class D circuit in detail over the past few weeks....FETs obsolete....SWR detector not quite right etc. I've e
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00178.html (12,742 bytes)

188. Re: LF: Decca 5501 (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 13 Jan 2016 09:49:03 +0000
--Original Message-- From: Andy Talbot <[email protected]> To: rsgb_lf_group <[email protected]> Sent: Fri, 8 Jan 2016 18:53 Subject: Re: LF: Decca 5501 The fact it is a GAPPED core is
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00225.html (14,860 bytes)

189. Re: LF: Decca 5501 (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 13 Jan 2016 10:41:48 +0000
--Original Message-- From: Andy Talbot <[email protected]> To: rsgb_lf_group <[email protected]> Sent: Wed, 13 Jan 2016 9:51 Subject: Re: LF: Decca 5501 Bit late now, but I found the c
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00229.html (17,159 bytes)

190. Re: LF: Decca 5501 (score: 1)
Author: Andy Talbot <[email protected]>
Date: Wed, 13 Jan 2016 16:08:18 +0000
--Original Message-- From: Andy Talbot <[email protected]> To: rsgb_lf_group <[email protected]> Sent: Wed, 13 Jan 2016 10:45 Subject: Re: LF: Decca 5501 I've just looked again, and th
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00231.html (20,498 bytes)

191. LF: Direct Upconversion from audio (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 25 Jan 2016 10:37:04 +0000
As several readers will appreciate, I have been a proponent of direct upconversion from audio to RF for some time using image cancellation and quadrature upconversion techniques.   These are particul
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00384.html (15,107 bytes)

192. Re: LF: Direct Upconversion from audio (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 25 Jan 2016 16:29:20 +0000
Having true baseband as an intermediate step is useful for other bands - in particular 24GHz where several types of off the shelf surplus equipment already has an image cancelling mixer, just needing
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00391.html (11,954 bytes)

193. Re: LF: Direct Upconversion from audio (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 25 Jan 2016 22:15:41 +0000
I already have a voice band to I/Q bit of software.  Written by G3PLX, it also generates AM and FM using a crafty use of a dummy low frequency tone at low level to cope with the DC slot.   http://www
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00399.html (13,888 bytes)

194. LF: Re: [rsgb_lf_group] GPSDO experiments (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 25 Jan 2016 22:19:24 +0000
  Greetings all, My GPSDO prototype (with not just a frequency-locking, but also phase-locking loop) seems to run reliably now. But there is one thing which puzzles me, maybe someone here has more e
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00400.html (16,521 bytes)

195. Re: Re[6]: LF: Is everyone else struggling to get onto WSPRNET? (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 31 Jan 2016 19:32:37 +0000
Works perfectly OK With Google Chrome on Win XP 'jnt On 31 January 2016 at 19:20, Nan and Sandy Sanders <[email protected]> wrote: Same behavior here on Win 7 pro 64 and Win XP with Firefox 44.0.
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00434.html (13,059 bytes)

196. LF: WOLF Coding (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 1 Feb 2016 17:18:05 +0000
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00005.html (11,684 bytes)

197. Re: LF: WOLF Coding (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 1 Feb 2016 18:47:12 +0000
Excellent ! Thanks for that pointer I've just run WOLF_GUI with the -n option and compared the results with that software written five years ago..  When interleaving is used, it gives the same answer
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00011.html (15,735 bytes)

198. Re: LF: JT9 Coding? (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 1 Feb 2016 20:36:53 +0000
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00016.html (12,591 bytes)

199. LF: Re: Direct Upconversion from audio (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 1 Feb 2016 20:47:38 +0000
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00017.html (12,778 bytes)

200. Re: LF: JT9 Coding? (score: 1)
Author: Andy Talbot <[email protected]>
Date: Mon, 1 Feb 2016 21:55:53 +0000
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00027.html (16,248 bytes)


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