At 05:41 PM 10/22/02 +0100, you wrote:

Following the presentation on Data at the HFC, I have
been thinking about methods of generating Jason.

It seems to me that one of the difficulties is building
the transmitter, which either requires a controlled
DDS, or a mixer arrangement of some sort.

A more convenient method would be to make the
software program a conventional HF tx thriugh its
CAT interface and use the divide by 100 method to
generate 136KHz output.

Unfortunately it is common for transmitter to be
limited to a resolution of 10Hz, which ultimately
leads to a resolution of 10mHz reather than the
1mHz that Jason calls for.

I was wondering if it would be worth sacrificing the
bandwidth for the increased convenience of signal
generation?

73

Stewart G3YSX

A contolled LF DDS is now very easy to make.
See http://www.qsl.net/zl1bpu/micro/EXCITER/Index.htm


73, Ric, VK7RO