[GreenKeys] DOVETRON TRANSMITT TONES DRIFTING

[Roy Morgan]

At 04:50 PM 3/20/2005 -0800, ROBERT LAAG wrote:
>JUST WONDERING IF ANYONE HAS SEEN THE PROBLEM WHERE THE TRANSMITTING TONES 
>START DRIFTING OFF FREQ???


Robert,

Let's clarify a little bit,  can we?

Are you feeding the AFSK tones output of the Dovetron into the audio 
section of your transmitter?

Are you getting reports that your transmitted tones are drifting.. if so 
are BOTH tones drifting, or just ONE?  Or are they both drifting the same 
amount? Different amount?

Have you measured the audio tones from the Dovetron with a frequency 
counter?  You can get it into Mark or Space hold and see what the 
frequencies are and see if they are actually drifting.

If BOTH of your transmitted tones are drifting, then it's likely in the 
transmitter, not the Dovetron, assuming you are using AFSK tones fed to the 
audio section of your transmitter.

I look forward to hearing what the trouble is once you find it.

Roy

Roy Morgan
K1LKY since 1959
7130 Panorama Drive, Derwood MD 20855
301-330-8828 home .... 301-975-3254 work
roy.morgan at nist.gov