• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Part15

Part15

License Free, legal, low-power radio broadcasting

  • Home
  • The ALPB
  • Forums
  • Members
  • About Us
  • Contact Us
  • Log In

rock95seven

Profile picture of rock95seven

@rock95seven

Active 8 months, 1 week ago
Just dropping by to say Hello and that I am getting back into the part 15 arena to take another shot at broadcasting after a long 2 1/2 year break. Hope all is well with everyone. Happy Broadcasting View
  • Activity
  • Profile
  • Friends 0
  • Blog 150
  • Forums
  • Posts

Testing again on 800 khz

Posted on August 8, 2010

I have started testing on 800 khz using the Talking House am transmitter.

I have started testing on 800 khz using the Talking House am transmitter.

One serious problem with my particular model (TH 2) is the hum and low modulation. I am sure after spending some time digging around here on Part15.us a solution will be found to over-come these two problems.

The hum is probably the wall wart supplied with the TH and can be fixed by using a different power supply. Perhaps a regulated power supply.

Fixing the low modulation is my main concern and after tinkering with a few circuits I have come to the conclusion that a matching transformer is the only way to go. So far i have been experimenting with a graphic equalizer made by Teac. This has helped with controlling the tinny audio by limiting the highs and increasing the bass.
It is a shame that the digital audio storage chip has better modulation than the line input jack. The input jack sounds like about 50% modulation while the digital audio chip seems to transmit at or close to 80% modulation.

Hard to tell without a modulation meter but that is a educated guess none the less. So anyway, thats what i am up to these days.

Hope everyone is doing great.

p.s. testing may not be restricted to 800 khz but right now it seems there is less hum there.

Primary Sidebar

Who’s Online

There are no users currently online

Recent Posts

  • Letteralmente Radio diventa…
  • shortwave pirate
  • March Mystery Month On The Blare Blog
  • Test Blog Post
  • Carl’s Back Room

Footer

Members

Newest | Active | Popular
  • Profile picture of Ian Homan - WGGQ Waupun
    Ian Homan - WGGQ Waupun
    Active 4 hours, 57 minutes ago
  • Profile picture of Thelegacy
    Thelegacy
    Active 14 hours, 44 minutes ago
  • Profile picture of Mark
    Mark
    Active 4 days, 2 hours ago
  • Profile picture of Paul Dobosz
    Paul Dobosz
    Active 6 days, 23 hours ago
  • Profile picture of timinbovey
    timinbovey
    Active 1 week ago

Copyright © 2023 · Part15 on Genesis Framework · WordPress · Log in