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Tuesday, January 23, 2024

The Compactron Line Preamplifier


Here is another completed build of the Conpactron Line Preamplifier.

It is similar to the first Compactron Line stage shown last year, except this one lacks the phase switch.

It is reduced to the minimal functionality required. On/off switch, volume control (which is a stepped transformer volume control) and input selector.

Two of the inputs are balanced using input transformers and two are single ended.

Outputs are available as XLR and RCA.

The gain is 9dB. But other gains can be specified when ordering such a line stage. Output impedance eis less than 200 Ohms.

When ordering such a unit the number of inputs and selection of balanced vs SE inputs can be specified as well as additional options like phase, balance, stereo/mono controls as well as tape loop.

And of course different colors.

Best regards


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