Author Topic: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)  (Read 53494 times)

Offline Zazzle

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #30 on: August 27, 2017, 2129 UTC »
Hey,

that was easy to fix. The sealing gave away and the recent thunderstorm with heavy rain introduced water to the circuit. Which it didn't like. The +12V track was entirely corroded away.

Fixed. The Beacon is operating again.

Kind greetings,
~Zazzle
« Last Edit: August 27, 2017, 2200 UTC by Zazzle »
Trans-/Receivers: JRC NRD-525,  ICOM IC-R72,  YAESU VR-5000,  YAESU FT-897D
Antennas: 80M Halfwave Dipole,  40m Inverted-V,  5/8λ Groundplane,  20M Longwire,  misc. UHF/VHF Scanner Antennas.

Offline DD2DR

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #31 on: September 12, 2017, 2119 UTC »
Hi Zazzle,
great Job. !
I was listening the beacon today from about 19:30 till 20:00 UTC.
2017September12 20:00 UTC 6398,5 kHz
faint but stabil signal, S1 T4 Q3 with moderate fading and noise.
A1A Beacon
JO62SK Common and Precious JO62SK ....
Rec. in Germany JN49AC Loop R1000 QRB 680km
<<a small reception video is available on https://www.youtube.com/watch?v=r-qS3OYh1s4 >>
PSE QSL
73 de DD2DR, Klaus

Offline DimBulb

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #32 on: September 29, 2017, 2346 UTC »
First time I've heard this beacon for quite a while.  Good copy in New Hampshire, S2 with the noise level S2-S3.
Location: New Hampshire  eMail: dimbulb999@gmail.com

Offline Zazzle

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #33 on: September 30, 2017, 0903 UTC »
Hi Zazzle,
great Job. !
I was listening the beacon today from about 19:30 till 20:00 UTC.
2017September12 20:00 UTC 6398,5 kHz
faint but stabil signal, S1 T4 Q3 with moderate fading and noise.
A1A Beacon
JO62SK Common and Precious JO62SK ....
Rec. in Germany JN49AC Loop R1000 QRB 680km
<<a small reception video is available on https://www.youtube.com/watch?v=r-qS3OYh1s4 >>
PSE QSL
73 de DD2DR, Klaus

Arghl. Sorry for the late reply. I read it back then but forgot to anser.
Many thanks for the video. It's alway nice to know where it was received. :)

Kind Greetings,
Zazzle
Trans-/Receivers: JRC NRD-525,  ICOM IC-R72,  YAESU VR-5000,  YAESU FT-897D
Antennas: 80M Halfwave Dipole,  40m Inverted-V,  5/8λ Groundplane,  20M Longwire,  misc. UHF/VHF Scanner Antennas.

Offline Zazzle

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #34 on: September 30, 2017, 0909 UTC »
Hi DimBulb!

First time I've heard this beacon for quite a while.  Good copy in New Hampshire, S2 with the noise level S2-S3.

Oi, nice! It's been quite a whiiiiiile since I got reports from 'the other side'. AFAIK it was in early spring. So it's a seasonal depending connection I guess. Many thanks. :)

Kind greetings,
Zazzle
Trans-/Receivers: JRC NRD-525,  ICOM IC-R72,  YAESU VR-5000,  YAESU FT-897D
Antennas: 80M Halfwave Dipole,  40m Inverted-V,  5/8λ Groundplane,  20M Longwire,  misc. UHF/VHF Scanner Antennas.

Offline digitalmod

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #35 on: December 13, 2017, 0206 UTC »
  Late in the show here, but aren't class D and E just the cat's nose? Only limited by available saturation current. At 80 percent eff. that a swell little AM transmitter at 80/4 carrier power. 20 watts! Did you try amplitude modulating it? Only a cheap monaural amp would be needed. Of course only should be said filtering the output to a close sinusoidal signal would be needed.
Radio is dying. We need to give it shelter

Offline Zazzle

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #36 on: February 26, 2018, 1432 UTC »
Hi there,

Late in the show here, but aren't class D and E just the cat's nose?

Class D mimics an analog signal by filtering a PWM signal (x-times oversampling equired for quality) though a low pass.
Class E generates a sine signal directly from a rectangular signal that equals the target frequency. Conversion between REC and SINE is done by a CCL filter at resonance.
In the core, yes, in both types convert a "digital" signal to a analog one by filtering.

20 watts! Did you try amplitude modulating it?

I set it to 20W. The shown board is capable of delivering 60W peak carrier from 12V. Likely more with other components. Class E is fairly easy to upscale. About modulation: yes, whatever can supply with with a positive-wing-only-signal works. Some classy monorail amp with the blocking cap on the output removed will do fine. Or some cheap Opamp-Stuff. Or, if you like to stick to "keeping it efficient": some PWM Amp.


Kind geetings,
Zazzle.
Trans-/Receivers: JRC NRD-525,  ICOM IC-R72,  YAESU VR-5000,  YAESU FT-897D
Antennas: 80M Halfwave Dipole,  40m Inverted-V,  5/8λ Groundplane,  20M Longwire,  misc. UHF/VHF Scanner Antennas.

Offline Zazzle

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #37 on: February 26, 2018, 1451 UTC »
Update. Same issue as here.

Operating again.
Trans-/Receivers: JRC NRD-525,  ICOM IC-R72,  YAESU VR-5000,  YAESU FT-897D
Antennas: 80M Halfwave Dipole,  40m Inverted-V,  5/8λ Groundplane,  20M Longwire,  misc. UHF/VHF Scanner Antennas.

Offline NoSkip

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Re: Beacon Project "Common and Precious II" (on air, 6.398.5kHz, 30W)
« Reply #38 on: April 12, 2018, 1304 UTC »
I may I received it this afternoon since about 12:00 GMT on the UTwente WebSDR. At the time of the image it was around S2-S3 but at the time of posting it's a steady S5-S7
Current propagation conditions from Dourbes


Current propagation conditions from Dourbes

I did have FLDigi running but the decoded text wasn't much readable. Not sure if it didn't like the intermittent fading present on the signal
Quote
TTMMT XN EEFEHEM GD TT OE T T*IOUH EE*ST 5L T *O IE EKRESE ED PEEFS@WB2EK 5OW AAJMNE<AA>EE2<SK>*TNKCOM E3*A*BA0EPSHTASK*SN6Y<SK>LE5<SK>Y LEM?<SK>IM T*BTM MEHJ
1 I6A*DIAGES<SK> SETAMMII<SK>*ASJECD*SS JIEAS E AM*T *I*SN EIE5 LM ET T*N*US JESK EE MO62SK CMMMONADO*JM A*)EEMO<SK>TEEKMS<AA>MIA*EE

I'd like to say I've stumbled upon these beacons by accident and I love the whole concept and especially your professional execution... Very cool
« Last Edit: April 12, 2018, 1307 UTC by NoSkip »