[Lowfer] BPSK31

[John Andrews]

Ed,

> Question:  How is TAG generating the BPSK31 signal?

It's actually a phasing SSB exciter. The carrier is generated by a DDS chip,
then buffered and fed to two SBL-3 mixers. The output of my sound card is
routed through a 90 degree audio phase shift network to the mixers, and the
combined mixer output is amplified and sent to the PA. It's a pretty broad
signal, since the PA runs in the usual lowfer switching mode. But for this
application, there's nobody to bother.

John Andrews