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Total 24 documents matching your query.

1. LF: Facebook LF/MF Amateur Radio Group (score: 1)
Author: John Fisher <[email protected]>
Date: Sat, 12 Sep 2015 18:45:50 -0700
If you are on Facebook, check out this LF/MF Group... ARLF - Amateur Radio Low Frequency https://www.facebook.com/groups/568553796605700 73 de VA3VVV John
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00032.html (10,009 bytes)

2. LF: LF Ground (score: 1)
Author: John Fisher <[email protected]>
Date: Thu, 24 Sep 2015 06:21:49 -0700
Tie into the city water system...One guy said this was the only ground that worked for him at LF... 73 John VA3VVV
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00110.html (8,350 bytes)

3. LF: LF Ground (score: 1)
Author: John Fisher <[email protected]>
Date: Thu, 24 Sep 2015 08:51:41 -0700
Hi Chris, Well, that's a shame...It's all cast iron pipe here in Toronto... I put in seven ground rods around my house, each 10 feet long and 3/4 inch = diameter...Standard copper clad steel electric
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00112.html (8,730 bytes)

4. Re: LF: Stacking toroids (score: 1)
Author: John Fisher <[email protected]>
Date: Mon, 27 Mar 2017 13:30:28 +0000 (UTC)
Hi Jay, Can you recommend a way to compensate for the doubled inductance? Also, I'd be interested in two driver boards if you get more made. Thanks, John VA3VVV Subject: Re: LF: Stacking toroids To:
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-03/msg00213.html (10,614 bytes)

5. Re: LF: QRSS10 477.7 KHz (score: 1)
Author: John Fisher <[email protected]>
Date: Sat, 1 Apr 2017 21:23:04 +0000 (UTC)
I'll be listening, Joe! I can transmit too... VA3VVV Toronto Subject: Re: LF: QRSS10 477.7 KHz To: [email protected] Received: Saturday, April 1, 2017, 5:01 PM Hi Roelof and John, Thank-yo
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-04/msg00008.html (9,263 bytes)

6. Re: LF: Wilkinson combiners (score: 1)
Author: John Fisher <[email protected]>
Date: Sat, 8 Apr 2017 17:58:54 +0000 (UTC)
Hi Chris, To me, it doesn't sound like a good idea to combine two switching square wave signals together...Might be okay if they were synchronized...Better to filter them into sine waves first and th
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-04/msg00060.html (13,611 bytes)

7. LF: VLF...Transmitting on 8270 Hz now...Amp running at 300W...VA3VVV Toronto (score: 1)
Author: John Fisher <[email protected]>
Date: Sun, 30 Apr 2017 05:47:19 +0000 (UTC)
Transmitting on 8270 Hz now...Amp running at 300W...VA3VVV Toronto
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-04/msg00386.html (9,656 bytes)

8. Re: LF: VLF...Transmitting on 8270 Hz now...Amp running at 300W...VA3VVV Toronto (score: 1)
Author: John Fisher <[email protected]>
Date: Sun, 30 Apr 2017 17:57:24 +0000 (UTC)
Hi All, I was transmitting until 2:30 AM EST last night. I should have announced when I shut down. I didn't think anyone was interested. I posted the same announcement last week and nobody replied...
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-04/msg00395.html (11,118 bytes)

9. Re: ELF: ZEVS back on air (score: 1)
Author: John Fisher <[email protected]>
Date: Sun, 28 May 2017 18:31:21 +0000 (UTC)
It's the station's callsign, Martin... https://en.wikipedia.org/wiki/ZEVS_(transmitter) 73 John VA3VVV Subject: Re: ELF: ZEVS back on air To: [email protected] Received: Sunday, May 28, 20
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00245.html (11,124 bytes)

10. Re: ELF: ZEVS back on air (score: 1)
Author: John Fisher <[email protected]>
Date: Sun, 28 May 2017 18:31:21 +0000 (UTC)
It's the station's callsign, Martin... https://en.wikipedia.org/wiki/ZEVS_(transmitter) 73 John VA3VVV Subject: Re: ELF: ZEVS back on air To: [email protected] Received: Sunday, May 28, 20
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00246.html (10,816 bytes)

11. Re: ELF: ZEVS back on air (score: 1)
Author: John Fisher <[email protected]>
Date: Sun, 28 May 2017 20:14:16 +0000 (UTC)
Must be Zeus... ZE is assigned as an ITU Prefix to the UK Maybe the Russians have sent their Boomers deep? Hope it doesn't mean heightened tensions between Russia and the US... Subject: Re: ELF: ZEVS
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00251.html (11,126 bytes)

12. Re: ULF: New experiment on 970 Hz, results (3/3) (score: 1)
Author: John Fisher <[email protected]>
Date: Fri, 16 Jun 2017 00:04:14 +0000 (UTC)
Fantastic work, Stefan! John 73 de VA3VVV Toronto, Canada Subject: Re: ULF: New experiment on 970 Hz, results (3/3) To: "[email protected]" <[email protected]>, "Renato Romero"
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-06/msg00134.html (12,773 bytes)

13. LF: Transmitting now on 15.8 kHz...600W to the antenna (score: 1)
Author: John Fisher <[email protected]>
Date: Mon, 3 Jul 2017 00:03:58 +0000 (UTC)
Transmitting now on 15.8 kHz...600W to the antenna GPS disciplined carrier 73 de VA3VVV
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-07/msg00004.html (8,580 bytes)

14. Re: LF: ICOM IC706 (score: 1)
Author: John Fisher <[email protected]>
Date: Fri, 29 Sep 2017 03:11:53 +0000 (UTC)
My IC-706MKIIG puts out about 200mW on 630m... 73 John VA3VVV Subject: Re: LF: ICOM IC706 To: "rsgb_lf_group" <[email protected]> Received: Thursday, September 28, 2017, 6:17 PM Ken,   It
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00185.html (11,004 bytes)

15. Re: VLF: Using resonance effects of earth-ionosphere for radio experiments (score: 1)
Author: John Fisher <[email protected]>
Date: Mon, 23 Oct 2017 14:08:25 +0000 (UTC)
Hi Stefan, I reduced the size of the second graph and it is attached. 15 kHz is the sweet spot of Earth Ionosphere Waveguide Propagation. I have a special license for 15.8 kHz and will be doing some
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-10/msg00227.html (15,118 bytes)

16. Re: VLF: Using resonance effects of earth-ionosphere for radio experiments (score: 1)
Author: John Fisher <[email protected]>
Date: Mon, 23 Oct 2017 14:17:40 +0000 (UTC)
Hi Stefan, Actually, 1 - 4 kHz is the worst frequency range as it is right between the two waveguide Modes 0 and 1. ELF around 100 Hz is good for Mode 0 and Mode 1 peaks around 15 kHz. 73 John VA3VVV
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-10/msg00228.html (14,341 bytes)

17. Re: VLF: Using resonance effects of earth-ionosphere for radio experiments (score: 1)
Author: John Fisher <[email protected]>
Date: Mon, 23 Oct 2017 15:14:28 +0000 (UTC)
The second graph shows 4 kHz as the worst. This is the dip between Mode 0 and Mode 1 in the waveguide. 15 kHz range is the best for Mode 1 Earth Ionosphere Waveguide Propagation. The antenna efficien
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-10/msg00231.html (18,905 bytes)

18. RE: VLF: Transatlantic success East to West (score: 1)
Author: John Fisher <[email protected]>
Date: Mon, 11 Dec 2017 12:43:40 +0000 (UTC)
I have developmental authorization for 15.8 kHz, which is right at the best spot. This frequency range was used for the horizontal for the old CRT TV sets. These are mostly gone now. I would think it
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00159.html (14,511 bytes)

19. Re: LF: RE: New world record distance by W4DEX and IK1QFK (score: 1)
Author: John Fisher <[email protected]>
Date: Wed, 27 Dec 2017 22:46:44 +0000 (UTC)
What frequency? It doesn't say... 73 de VA3VVV Subject: LF: RE: New world record distance by W4DEX and IK1QFK To: [email protected] Received: Wednesday, December 27, 2017, 5:11 PM Congratu
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00407.html (10,007 bytes)

20. Re: LF: RE: New world record distance by W4DEX and IK1QFK (score: 1)
Author: John Fisher <[email protected]>
Date: Thu, 28 Dec 2017 01:31:15 +0000 (UTC)
Thanks, Stefan! 73 John Subject: Re: LF: RE: New world record distance by W4DEX and IK1QFK To: [email protected] Received: Wednesday, December 27, 2017, 5:58 PM 8269.9 Hz. See the bottom e
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00410.html (12,718 bytes)


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