Yes, I too have some DDS, & as I play with rotary-encoder (or press numatic keys) , I can listen strong low frequency beatings (machine gun firing) in my short-wave polymer enclosure AM Receivers... And I think It will be nice if we use Z-match (both low & high pass @ front end) Antenna Tuner with MINIMA Multibander. -- -- Please encourage recycling, reuse or repairing of E-waste. ░7░3░ ░d░e░ ░V░U░3░S░X░T░