Rich
Full Member
RF Systems Engr (retired)
Posts: 112
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Post by Rich on Feb 9, 2020 12:36:52 GMT
Out of curiosity I decided to estimate the usefulness of the skywave signal of a 13.56 MHz transmit system radiating close to the FCC-legal 15,848 µV/m field at a distance of 30 meters from its antenna (see below).
The lack of any color-coded traces other than the MUF appearing on the calculation graphic shows that the maximum field at that receive site does not exceed the ambient noise level for that frequency and radiated power.
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Post by Admin on May 1, 2020 16:03:49 GMT
Good news!
My beacon was heard in North Carolina!
Boomer pointed me to a post at HFUnderground where a person logged his receiving my beacon on 13.561 mHz. He copied my CW message correctly.
A fair distance from NE Ohio.
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Post by Druid Hills Radio on May 6, 2020 12:46:57 GMT
Good news! My beacon was heard in North Carolina! Boomer pointed me to a post at HFUnderground where a person logged his receiving my beacon on 13.561 mHz. He copied my CW message correctly. A fair distance from NE Ohio. What you using for a transmitter and antenna?
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Post by Boomer on May 6, 2020 23:48:17 GMT
Ooh ooh, I think I know Mr. Meow, a Black Cat Systems beacon kit and a vertical antenna, but Dr. Bob can fill in the details.
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Post by Admin on May 7, 2020 3:38:52 GMT
Yep, Boomer got it.
The beacon transmitter is from Black Cat Systems. It uses 1 quad NOR gate chip, a programmable keyer chip, a crystal and a handful of passive components.
The antenna is a tri-band vertical for 10-15-20 meters which I normally use with my HF rig. I'm sure if I build an antenna tuned to 13.560 mHz I might have better results.
Boomer put a link to the reception report in another thread about the Beacon.
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Post by Druid Hills Radio on May 7, 2020 14:25:02 GMT
Yep, Boomer got it. The beacon transmitter is from Black Cat Systems. It uses 1 quad NOR gate chip, a programmable keyer chip, a crystal and a handful of passive components. The antenna is a tri-band vertical for 10-15-20 meters which I normally use with my HF rig. I'm sure if I build an antenna tuned to 13.560 mHz I might have better results. Boomer put a link to the reception report in another thread about the Beacon. Thanks.
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Post by Boomer on May 8, 2020 9:36:10 GMT
You could QSL them, if you were planning to send QSLs for reception.
I wonder if there are databases for station ops or beacon DXers, pages like QRZ that hams have? Beaconing seems like a real small slice of the DXing pie, but maybe there's some kind of organization around it.
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Post by Admin on May 9, 2020 14:44:24 GMT
I looked him up ON QRZ but the address was different than the location he posted at the forum. So, I may send a QSL and see if it goes through.
Nice thing about beaconning, it's like fishing. You just drop in your line, relax and wait.
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