Jerry,
Diddling with the BFO to make it a clarifier is not good. I agree it is a bad idea today. It worked back in the 50's and 60's because there wasn't much of any other choice and the filters weren't as sharp as they are today. It's why on the old RME 4350 it was always recommended to reset the bfo dial to zero. If you didn't your transmitted frequency wouldn't necessarily jive with your received frequency. Of course back then, a 1kc resolution was considered good and most people had separate receivers and transmitters so it didn't matter as much.
If you want a true clarifier it should be done with the vfo frequency and the offset from the transmitted carrier frequency should be indicated somewhere on the display.
Based on the message Allard left earlier, he *did* implement a true PBT by adjusting the vfo and the bfo so the suppressed carrier frequency is not changed but the relationship to the SSB filter changes. Again, it just goes to show how advanced this little rig actually is!
