Hello Graham,
the DDS-Oscillator under
this link may partial meet your requirements …
http://www.box73.de/catalog/pdf/FA0407_694-695.pdf?osCsid=983aae56f383b
73 de Gerhard / DK6NI
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Looking for a low frequency , 100k > 30 Mhz ish dds vfo,
possibly a kit ,
better a part completed kit would be better
...second hand working
Ideal would be a box with a frequency display and a
key pad to
enter the frequency , preferable to a pc addressed
device
Couple of volts sine wave out , nothing fancy , simple
master
Any ideas or links (any for sale ?)