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
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
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:
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
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
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...
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
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
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
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
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
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
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
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
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
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