"MikeN" wrote in message
...
Hi

Has anyone given thought to producing NBFM using the AD 9854 or
similar DDS chips, for multiplying or heterodyning up to 2m or 70cm.

Texas instruments: TRF4400

Single-Chip RF Transmitter for 433 MHz ISM Band
420-MHz to 450-MHz Operation
FM/FSK Operation for Transmit
24-Bit Direct Digital Synthesizer (DDS) With 11-Bit DAC

regards