Radio Design Labs

Connecting a TX-1A Backwards
May 24, 2005 Comments Off on Connecting a TX-1A Backwards

The TX-1A is used primarily for galvanic isolation and format conversion between equipment. Conversion from -10 dBV consumer level up to +4 dBu professional level requires voltage gain. The transformer in the TX-1A has a 1:1 ratio and uses an adjustable attenuator circuit at its output to lower the output signal to the level required….
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The Difference Between Balanced and Unbalanced Audio
May 23, 2005 Comments Off on The Difference Between Balanced and Unbalanced Audio

Balanced audio carries equal but opposite signals on two conductors. These symmetrical signals are relatively immune from induced hum and noise. Frequently, balanced cables also are shielded. The shield is independent from either of the signal conductors. Unbalanced audio is carried on a single conductor relative to the shield. In unbalanced cables, the shield is…
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