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Total 384 documents matching your query.

341. Re: LF: LF magic (score: 1)
Author: Chris Wilson <[email protected]>
Date: Mon, 18 Feb 2019 19:34:29 +0000
Yes, the band is still full of surprises, I thank the dog for waking me up and me looking at the pc Best Regards Chris Wilson On Mon, 18 Feb 2019, 19:14 Rob Renoud <[email protected] wrote: Paul
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00183.html (10,370 bytes)

342. Re: LF: VO1NA 137477 Hz (score: 1)
Author: Chris Wilson <[email protected]>
Date: Fri, 22 Feb 2019 15:10:01 +0000
Hello Joe, I did not know your father was an amateur operator too. My condolences to you and your family, when did he last operate? It's great to see you carrying on in his fashion though, he must of
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00194.html (9,687 bytes)

343. Re: LF: Class D current spikes (score: 1)
Author: Chris Wilson <[email protected]>
Date: Mon, 25 Feb 2019 15:48:08 +0000
Hello Rik, I have a series of scope captures from my W1VD amp showing huge voltage spikes on the FET drains at the end of WSPR and especially OPERA TX sequences. I suspected inductance was the cause.
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00220.html (14,321 bytes)

344. Re: LF: Class D current spikes (score: 1)
Author: Chris Wilson <[email protected]>
Date: Mon, 25 Feb 2019 22:02:54 +0000
Hello Paul. everyone A series of overlapping scope captures at end of WSPR sequence with expensive high voltage / current Wolfspeed FET's that usually survived, into the antenna and into a 10kW dummy
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00225.html (13,576 bytes)

345. Re: LF: Class D current spikes (score: 1)
Author: Chris Wilson <[email protected]>
Date: Tue, 26 Feb 2019 11:18:36 +0000
Hello N1BUG, Just to add things were MUCH worst using a X2 multiplier circuit (Jay's). I now use an exciter frequency of X2 direct both from the U3S, and as of late X2 from the TS-590 into a simple s
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00233.html (11,766 bytes)

346. Re: LF: Class D current spikes (score: 1)
Author: Chris Wilson <[email protected]>
Date: Tue, 26 Feb 2019 16:09:50 +0000
Hello Eric, Yes, the output is a square wave when I use the U3S I take the output direct from CLK0 at 2X frequency (set in the U3S menu) via a co-ax to the input of the W1VD amp to Pin 3 of 74F74 wit
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00240.html (13,278 bytes)

347. Re: LF: Class D current spikes (score: 1)
Author: Chris Wilson <[email protected]>
Date: Tue, 26 Feb 2019 17:07:57 +0000
Hello Andy, Thanks for that! Bearing in mind i am not the sharpest knife in this drawer, would that perhaps explain why the U3S Si5351a output drives more reliably at 3.3V than say the output of a do
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00242.html (13,972 bytes)

348. Re: LF: Class D current spikes (score: 1)
Author: Chris Wilson <[email protected]>
Date: Tue, 26 Feb 2019 17:52:07 +0000
Hello Eric, No, I have always run the U3S in X2 mode as far as I can remember. No doubler, no squarer, just straight out of CLK0 to Pin 3 of the 74F74. And no issues at all. Thanks. BTW, I really adm
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00244.html (11,740 bytes)

349. Re: LF: LF Reflector archive (score: 1)
Author: Chris Wilson <[email protected]>
Date: Wed, 27 Feb 2019 23:11:06 +0000
Hello Jacek, Well done all, a VERY useful archive indeed, thank you! -- Best regards, Chris mailto:[email protected]
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00253.html (10,713 bytes)

350. Re: LF: Re: Surplus audio amplifiers (score: 1)
Author: Chris Wilson <[email protected]>
Date: Fri, 1 Mar 2019 13:44:59 +0000
Hello Mal, I think David G0MRF has bought the lot..... ;) -- Best regards, Chris mailto:[email protected]
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00002.html (10,096 bytes)

351. Re: LF: Re: Surplus audio amplifiers (score: 1)
Author: Chris Wilson <[email protected]>
Date: Fri, 1 Mar 2019 16:42:12 +0000
Hello mal, It was a joke :) G0MRF has had an awesome signal of late, so I jokingly mused he may have bought up all the amps, whereas he currently has a very good antenna, in actual fact. He hasn't co
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00004.html (10,121 bytes)

352. LF: Window line with flexible conductors? (score: 1)
Author: Chris Wilson <[email protected]>
Date: Mon, 4 Mar 2019 12:59:35 +0000
Hello all, I have had to repair my window line feeder several times due to flexing in the wind breaking the copper coated solid steel conductors. Before making my own feeder I thought I would ask if
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00022.html (8,198 bytes)

353. Re: R: RE: VLF: ebnaut transmission from Poland (score: 1)
Author: Chris Wilson <[email protected]>
Date: Tue, 5 Mar 2019 17:02:45 +0000
Hello, I was the boy to come to for nitrogen triiodide when I was at school, nearest I ever got to liking chemistry. There's probably still a few purple burn marks on various benches to this day... A
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00028.html (9,240 bytes)

354. Re: R: RE: VLF: ebnaut transmission from Poland (score: 1)
Author: Chris Wilson <[email protected]>
Date: Wed, 6 Mar 2019 11:38:25 +0000
Hello Marcin, Looks good, if you need a tester..... :) -- Best regards, Chris mailto:[email protected]
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00041.html (10,060 bytes)

355. Re: R: Re: VLF: Chemistry... (score: 1)
Author: Chris Wilson <[email protected]>
Date: Wed, 6 Mar 2019 13:26:07 +0000
Hello Paul, I'll read that tonight, thanks for the link. If the neighbours knew I was reading this they'd be, errr.... worried ;) They think I am "suspect" with the aerials and electronics, already.
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00044.html (10,201 bytes)

356. LF: Audio alert for JT-9 activity? (score: 1)
Author: Chris Wilson <[email protected]>
Date: Thu, 7 Mar 2019 17:19:30 +0000
Hi all, I just sent this message to the WSJT-X forum, would anyone support this request? If so please respond there. If Slow JT-9 could add this I would find it a very useful addition :) ~~~~~~~~~~~~
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00064.html (9,043 bytes)

357. Re: LF: Re: Polish MF ship back up trasmitter (score: 1)
Author: Chris Wilson <[email protected]>
Date: Tue, 19 Mar 2019 13:04:29 +0000
Hello Jacek, Thanks for the links I will try a Google Translate request on the forum you mentioned, I appreciate your trouble and time, all the best! -- Best regards, Chris mailto:[email protected]
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00162.html (12,334 bytes)

358. LF: Software to time swap 2 RX antennas over? (score: 1)
Author: Chris Wilson <[email protected]>
Date: Wed, 20 Mar 2019 11:27:12 +0000
Hello LF'ers, Looking for ideas re automatically swapping two RX antennas over to one receiver timed to WSPR or other timed digital modes to compare performance, Anyone got any input please? Thanks.
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00174.html (8,285 bytes)

359. Re: LF: Re: Audio alert for JT-9 activity? (score: 1)
Author: Chris Wilson <[email protected]>
Date: Thu, 21 Mar 2019 12:09:05 +0000
Hello Rik, I wish I could assist but it's far beyond my remit. I would however like to thank you for spending the time and grey cells looking at this, it's much appreciated, thank you. -- Best regard
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00182.html (11,616 bytes)

360. Re: LF: Software to time swap 2 RX antennas over? (score: 1)
Author: Chris Wilson <[email protected]>
Date: Fri, 22 Mar 2019 20:05:21 +0000
Hello Claudio and all who have replied here and by e-mail. I am liking the Spectrum Labs idea, but SL is a daunting application, but I am sure using it in his simple manner can't be *THAT* hard :) I'
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-03/msg00188.html (12,602 bytes)


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