pulse interferance

[doctor]

Does anyone get a pulse type interference on channel 30 when the skip is in?, no skip the pulse is gone

doctor

 

[DTB Radio]

I don't have a definite answer for you, but I have heard the same phenomenon on occasion, and usually in the higher channels (30-40). I don't hear it all the time when there's skip, as you do, however. What I've heard mainly is what sounds like pulse bursts, changing in phase or duty cycle, somewhat similar to the demodulated audio I once heard from a Radio Shack "high-end" RC truck (one of their $100.00+ jobs). It was a 27mhz signal, with some kind of pulse width or pulse phase modulation on a couple different audio frequencies. Whether you're hearing something similr, I don't know.

 

[parkair]

I'll keep an ear out for it and see if I hear it.

I have a dog shock collar and when you push the button it can be heard on 27.185 ! and makes a pulse sound.

 

[King Mudduck]

I hear it all the time on channel 23 all across the US.

 

[Hamin' X]

If you mean longer duration pulses, kinda like a thrumming sound, it might be diathermy. These are medical devices that use pulsed, HF radio waves, to induce deep tissue heating. Used to hear them all the time in the 60's and 70's.

Ignition noise is also, pulse interference, so not sure what you are hearing.

Rich