Many years ago.........Heathkit made some xceivers that used a super-regen detector. A "CB-1", Tener, Sixer, and a two'er. Someone came up with something I'll call a "light bulb squelch. Wasn't the best squelch, but it worked. Anyone out there know where this circuit is available? Also, I'm looking for a Heathkit CB-1 or a Tener (I'm told the are the same) Thanks, all info appreciated. Ron, K6ZL