Those little 1:1 audio isolation transformers come in several flavors.... 600 Ohm and 10K Ohm if memory serves me right. Which would be needed if we had to resort to using them? OK, back in my hole, Ron, KU7Y SOWP 5545M Arizona Outlaws Contest Club Brenda, AZ (Winter) Caldwell, ID (Summer) ku7y at qsl.net http://www.hatpinsandmore.com