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: A6 negative offset, who is still analogue on East Coast?  (Read 3156 times)

Offline Tim Bucknall

  • Jr. Member
  • **
  • Posts: 35
    • View Profile
    • Email
A6 negative offset, who is still analogue on East Coast?
« on: September 07, 2018, 0558 UTC »
Hi Guys,
for 2 months  i've recorded 87.75 with an SDR while beaming at North America (my qth is Northern England) looking for   transatlantic meteor scatter
this morning at 0543 utc i *MIGHT have had something on 87.74 (i'm trying not to get overexcited!)
so who is still on in analogue mode with decent power on A6- on the Eastern Seaboard of North America?

are all the "Frankenstein FMs" in the US on 87.75 zero offset or are some on 87.74?

thank in advance

yours  excitedly :D

Tim Bucknall, Congleton Cheshire, UK







Offline Tim Bucknall

  • Jr. Member
  • **
  • Posts: 35
    • View Profile
    • Email
Re: A6 negative offset, who is still analogue on East Coast?
« Reply #1 on: September 07, 2018, 0711 UTC »
likely suspect: CJOH-TV,  Deseronto, ON 10kw audio 

Offline ChrisSmolinski

  • Administrator
  • Marconi Class DXer
  • *****
  • Posts: 23900
  • Westminster, MD USA
    • View Profile
    • Black Cat Systems
Re: A6 negative offset, who is still analogue on East Coast?
« Reply #2 on: September 07, 2018, 1019 UTC »
Nice potential catch!
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop

Online MDK2

  • DX Legend
  • ******
  • Posts: 3717
  • Denver, CO
    • View Profile
    • My radio reception videos
Re: A6 negative offset, who is still analogue on East Coast?
« Reply #3 on: September 07, 2018, 1508 UTC »
Did you have a television image, or just audio?

If it was audio only.... The former television channel six frequency is 87.75 and it's often occupied by radio stations now. I have a Spanish language one here in Denver, KXDP (based in Boulder, actually). The rest of the traditional FM band 88-108 all have an odd number for the first decimal place (87.9, 88.1, 88.3 etc up to 107.9)

Here's a list of American radio stations transmitting on 87.75 MHz. If you got one, it would be an incredible catch because they all appear to be LPFM (low power - I don't know what the highest wattage a LPFM station can use, but the ones I've looked up don't ever seem to be over 100 W, or even as much as that.)

https://en.wikipedia.org/wiki/Channel_6_radio_stations_in_the_United_States

If it was TV, then it seems doubtful that it was American. I think all analogue transmissions have ceased, and Tim Bucknall's suggestion is a good one.
Denver, CO.
SDRPlay RSP2pro, Icom IC-7100, Grundig Satellit 750, Realistic DX-300, Tecsun PL-600.
W6LVP active loop, G5RV, 20m dipole, homebrewed mag loops.
eQSLs appreciated wickerjennie at gmail

Offline Tim Bucknall

  • Jr. Member
  • **
  • Posts: 35
    • View Profile
    • Email
Re: A6 negative offset, who is still analogue on East Coast?
« Reply #4 on: April 09, 2019, 1733 UTC »
Thanks all,
Iíve reluctantly concluded it was a local interference source

Your help was greatly appreciated though

Offline Tim Bucknall

  • Jr. Member
  • **
  • Posts: 35
    • View Profile
    • Email
Re: A6 negative offset, who is still analogue on East Coast?
« Reply #5 on: August 23, 2019, 1732 UTC »
 Great list btw,


during the  recent perseids shower i  pointed the aerial at 285 degrees (transatlantic) and recorded 87.75 overnight , nothing ventured nothing gained right?

i got  a blank carrier on 87.750, this time it definitely isn't local noise but is there any reason why anyone would be broadcasting a blank carrier?

it could be Italy off the back of the Aerial but nobody in Italy knows anything about it
another possibility is an Irish pirate

pretty much the only clear bit of band i have is 87.5- 87.9  which is why i'm trying 87.75 rather than something high powered
(though i do have some recordings of 91.7 still to check)

here's some  IQ files recorded overnight on 7th-8th august , the 87.75 signal is weak and best listened to in CW mode
rx was an Elad FDM-S2

for navigation purposes, i have a strong local pest on 88.0
https://mega.nz/#F!Zst1RQYb!8LmjaaQnx-Sb_K4tMMyDYQ