Re: Simple FT8 DSB rig

Ron Stone
 

Adam,

What do you think of going SSB instead of DSB at least for the transmitter?  I believe this would just involve the addition of a simple 3 pole crystal filter and an additional SA612 mixer circuit - not many components at all.  Suitable crystals for 20 meters are readily available - 4 MHz for the crystal filter and 10,073 MHz for the mixer (or 4 MHz and 3.072 MHz for 40 meters) which would just have to be pulled slightly.  This approach would double the effective power and also keep the channel cleaner - i.e., avoid the unnecessary LSB signal.

73,

Ron (KA3J)

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