HFU HF Underground
Loggings => HF Beacons => Topic started by: tesla on April 19, 2018, 1503 UTC
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Started hearing Y at 1500 utc...never heard it before...
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This could be the second Harmonic of the Y beacon I have heard around 4096.5 khz...
If so thats pretty cool.
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The rig to send the "Y" ident about 4096.53 kHz (via 4096-xtal) is a special A1A-CW / AM rig - pwr is about 1 watt CW and 200 mW carrier for AM modulation. Broadband circuit runs from 1 to 30 Mhz with a two-pie filter to cut above 30 MHz emissions. It runs most days from dusk to about 1000 PT, so the harmonic might be audioble daytimes. Ant is 60 ft. end-fed wire up 15 ft. and goes to an MFJ-941C transmatch... MB
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Am hearing Y now at 16:30 utc this morning! First time to hear it on 8193.
No Marin ditter this morning yet.
73, Mark
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nice catch Mark I have only heard one time so far...
I haven't heard Mini in a while either. It is only 4 mw.
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The rig to send the "Y" ident about 4096.53 kHz (via 4096-xtal) is a special A1A-CW / AM rig - pwr is about 1 watt CW and 200 mW carrier for AM modulation. Broadband circuit runs from 1 to 30 Mhz with a two-pie filter to cut above 30 MHz emissions. It runs most days from dusk to about 1000 PT, so the harmonic might be audioble daytimes. Ant is 60 ft. end-fed wire up 15 ft. and goes to an MFJ-941C transmatch... MB
Thanks for the tech info!
I've only caught it a few times here in Orange County
4096.525 KHz Very faint. "Y" beacon?
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April 25
Time 0331 utc Y was coming in well I was surprised...
I will have to listen for its 3rd harmonic...
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Am hearing Y as well as the marin ditter on 8193.760 with QSB just after 1500 utc this morning.
Also Rocky and Rainy doing well.
73, Mark
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THANK YOU guys for your "Y" reports - I estimate the second harmonic of "Y" 8193.06 (or so) is about 15 dB below the fund, thus is about maybe 50 mW output! MarinDit is just a 2N2222 colpits osc. and 555 dit-timer IC to a too-short enamal-wire hidden in the parent's attic for the past 18-plus years...
.See if the THIRD harmonic of "Y" is audible. I once while on a trip to northern SASKATCHEWAN heard strongly the THIRD harmonics of all three 4096 desert beacons before we (the three guys involved) put output tuning on them to cut this syndrome! Those were when Hexie/Coxie/Kelsie were the dominant trio, now mostly gone save for the daytimer Coxie still honking away after 17 years...
BTW, if a weak CARRIER is hrd. on the "Y" fund freq. rather than the stronger CW-mode ident (about 4096.53) it might be AM-modulated to about 90% mod. level max. - with rock/exotic music I play when taking desert walks outta here...
I will start to give your bcn. reports when possible, but need a few days advance notice of special tests/freqs. other than regular 24/7 bcns, cuz I don't log onto here everyday... - 73 - MB
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May 11 time 0329 utc in the clear for a couple of minutes
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at 1325 utc Y heard on 8193 khz wile hiking in Colorado the receiver KA1103.
Mini heard as well 7955 khz
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May 19 on my morning hike Y was solid copy beginning at 1334 utc on my KA1103 stuffed in my breast pocket with the whip
extended. Always nice to catch its 2nd harmonic.
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May 23 Time 1338utc Y is coming in weak but there none the less...