Page 27 - Triwatt Custom Lead Amp Builder's Guide

2 Wiring

Here is a guideline for wiring the kits with the supplied wire:
 Use 20 gauge solid for hook up from board to tubes
 Use 20 gauge solid for hook up from board to pots/front panel
 Use 20 gauge solid stripped for turret board buss bar
 Use 20 gauge solid twisted pair supplied for tube heater wiring
 Use Yellow and Blue etc. 20/18 Gauge, stranded, for power supply hook up - to
transformers, rectifier, standby etc.
 Re-use cut offs from the transformers for the power supply side as well.
 Use RG174U for input to V1 and as indicated on layouts
 Use green wires for ground wires.

Grounding Scheme
The TRIWATT use a two point grounding scheme where the
power side of the amp is connected to a single common ground
point, and the preamp part is connected to another point on the
chassis that is located immediately beside the input jacks.

For grounding these amps, we strongly recommend that you
follow the layout provided. We don’t recommend that you
deviate, but if you do, use a collected one-point star grounding
scheme. Everything connected together and marked with the
‘earth’ symbol on the schematic is connected together locally, and
then that local common is connected to the star point.

There is also a separate AC supply safety ground point near the IEC connector, which doesn't
form part of the actual amplifier circuit. WARNING: THIS CONNECTION IS VITAL FOR
SAFETY REASONS.

TrinityAmps TRIWATT Builders Guide Ver. 2.31.docx- 27 -