I wrote: > In the T-15 (0.5-0.8 kHz) and T-16/ARC-5 (0.8-1.3 kHz) units, this circuitry > (including T-53B) does not exist... Doh! That should have been: > In the T-15 (0.5-0.8 MHz) and T-16/ARC-5 (0.8-1.3 MHz) units... Mike / KK5F