The VHT-1 had only 4 channel transmit, the VHT-3 (pre-solo for me) was
the 10-12 channel. Remember the funky OBS system with the 12 position
switch etc? or asking for a short count from the tower for tuning with
the coffee grinder knob?

There was a later Narco (Mark II?) with "whistle stop tuning" and a
continuous edge mounted OBS. I recall it had 27 channels of transmit &
was legal for IFR. It was really big time.

Jim - I thought I had a manual for the VHT-3 but can't find it. How
times have changed.