Pete Cornish TB-83™

The TB-83™ was originally designed to be the interface between Burns Tri-Sonic pickups and the “Normal” input on vintage (pre Treble Boost) Vox AC30 amplifiers. Each TB-83 is individually numbered, signed and dated internally which provides full traceability and history. Due to the modular design of the TB-83™ all parts are replaceable if they become damaged.
The active circuitry is potted in semi-flexible resin as vital protection:

⊗Against environmental conditions which can cause unwanted changes to the electronic circuitry
⊗To eliminate the possibility of microphonic feedback that can occur when high gain devices are used in close proximity to amplifiers at full volume.

Glass fibre PCBs are prone to resonant vibrations and our use of dense potting material increases the mass of the circuit board to place any possible resonances outside the audio frequency spectrum.

The maximum output of the Pete Cornish TB-83™ is +10dBm and the measured output noise with a 10Kohms source impedance is -82dBm giving a signal to noise ratio of 92dB.

MANTEINANCE:
When it is apparent that the battery requires replacement remove the four Pozidrive #2 screws from the base plate, unclip the battery (noting carefully how the battery is located in the case) and fit the new one. Take care not to trap the battery wires under the base plate when it is reinstalled.
Supplied free with each TB-83™ is an old English Sixpence piece. This coin is the type used by Brian May as a guitar plectrum.