[TenTec] Interfacing Computers to Rigs

[Jim Brown]

On 10/28/2011 10:03 AM, Frank wrote:
> While transformer isolation of audio inputs and
> outputs along with opto isolated PTT lines might seem like overkill,
> they do avoid possible problems caused by ground loops and electrical
> incompatibilities.

Transformer isolation and opto-isolation are totally un-necessary if you 
follow the simple AC power and bonding rules in the two tutorials I 
cited in the headphone thread.

73, Jim Brown K9YC