We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Author Topic: New HIFER Beacon "RF" is on the air!!  (Read 4102 times)

Offline Finman

  • Jr. Member
  • **
  • Posts: 61
    • View Profile
    • Email
Re: New HIFER Beacon "RF" is on the air!!
« Reply #30 on: December 15, 2017, 1708 UTC »
RF just faded in with a really nice signal here at 2210z. The little beacon that could!  :)

"I think I can! I think I can!"  ;D

Offline Mateo

  • Newbie
  • *
  • Posts: 13
  • near St. Louis, MO
    • View Profile
Re: New HIFER Beacon "RF" is on the air!!
« Reply #31 on: April 03, 2018, 1600 UTC »
Heard near St. Louis, MO at 1600 UTC on 4/3/2018

Only S-1 to S-2 but still clear.
Matt NM9H near St. Louis, MO
qsls (please!) to:   matt.nm9h [at] gmail.com
ICOM R-70 , Yaesu 1000MP , ELAD FDM-S2
Several Dipoles and a 300 ft. longwire

Offline tesla

  • Moderator
  • Hero Member
  • *****
  • Posts: 648
    • View Profile
Re: New HIFER Beacon "RF" is on the air!!
« Reply #32 on: April 04, 2018, 1356 UTC »
I suspect that the Black Cat circuit is putting out much more power then the part 15 Fcc rules allow...
Therefore that's why some of these beacons are being heard quite often.  I did not realize that getting a Hifer page up on HFU would
create this situation.




Offline Finman

  • Jr. Member
  • **
  • Posts: 61
    • View Profile
    • Email
Re: New HIFER Beacon "RF" is on the air!!
« Reply #33 on: April 04, 2018, 1522 UTC »
Are you referring to my beacon? RF?

FYI.... I'm not using a "black cat circuit"


I suspect that the Black Cat circuit is putting out much more power then the part 15 Fcc rules allow...
Therefore that's why some of these beacons are being heard quite often.  I did not realize that getting a Hifer page up on HFU would
create this situation.
« Last Edit: April 04, 2018, 1842 UTC by Finman »

Offline ChrisSmolinski

  • Administrator
  • Marconi Class DXer
  • *****
  • Posts: 24103
  • Westminster, MD USA
    • View Profile
    • Black Cat Systems
Re: New HIFER Beacon "RF" is on the air!!
« Reply #34 on: April 04, 2018, 1557 UTC »
I suspect that the Black Cat circuit is putting out much more power then the part 15 Fcc rules allow...
Therefore that's why some of these beacons are being heard quite often.  I did not realize that getting a Hifer page up on HFU would
create this situation.

There is a trimmer pot to adjust your output, and remain within Part 15 limits.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 120 ft T2FD/ 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop / Discone in a tree

Offline Finman

  • Jr. Member
  • **
  • Posts: 61
    • View Profile
    • Email
Re: New HIFER Beacon "RF" is on the air!!
« Reply #35 on: April 04, 2018, 1843 UTC »
Thanks for the report Mateo. Glad it's making it to St Louie!

Heard near St. Louis, MO at 1600 UTC on 4/3/2018

Only S-1 to S-2 but still clear.

Offline Prairiedog

  • Newbie
  • *
  • Posts: 10
    • View Profile
Re: New HIFER Beacon "RF" is on the air!!
« Reply #36 on: April 04, 2018, 2009 UTC »
It does seem a bit touchy trying to adjust the trimmer pot. It's easy to go from a couple of milliwatts to 30 in no time flat. A lower value in the 220 ohm range might be better, and is well within the drive capabilities of the three paralleled NAND gates.

Offline tesla

  • Moderator
  • Hero Member
  • *****
  • Posts: 648
    • View Profile
Re: New HIFER Beacon "RF" is on the air!!
« Reply #37 on: April 04, 2018, 2027 UTC »
I'm not referring to any specific beacon...what I meant to say is that I would suspect
that a HIFER beacon that was being heard often could be a Black Cat circuit because the circuit
has the potential to run higher power then Part 15 rules allow. Of course higher power beacons
could come from home brew circuits.

I'm not the police or a guru to anyone...

Chris and RF beacon operator I meant no personal attack to either of you guys.
Often I don't really communicate well via E mail. 73


Offline ChrisSmolinski

  • Administrator
  • Marconi Class DXer
  • *****
  • Posts: 24103
  • Westminster, MD USA
    • View Profile
    • Black Cat Systems
Re: New HIFER Beacon "RF" is on the air!!
« Reply #38 on: April 04, 2018, 2106 UTC »
It does seem a bit touchy trying to adjust the trimmer pot. It's easy to go from a couple of milliwatts to 30 in no time flat. A lower value in the 220 ohm range might be better, and is well within the drive capabilities of the three paralleled NAND gates.

A good idea. Also, I suspect you could solder a fixed resistor across the wiper and ground on the pot, to reduce the maximum output range.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 120 ft T2FD/ 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop / Discone in a tree