Version 3.2
Page: 27
Insulated jacks
To insulate the input and output jacks either use plastic insulated jacks or metal jacks with
insulating washers. Some people prefer the increased durability of metal jacks. Insulating a
metal jack requires a shoulder washer with a 3/8 in. internal hole that fits a ½ in. panel hole.
Minimizing transformer interference
To minimize coupling between the power transformer and output transformer orient them so
their plates are at right angles. If possible, place them at opposite ends of the chassis.
Keep the input stage wiring short and away from the output stages. This minimizes the
possibility of oscillations caused by coupling of the output signal into the input.
Mount the grid resistors as physically close to the grid pins as possible.
Use a twisted pair of wires for the tube filament wiring. Route it away from AC lines and close
to the chassis.
Wiring
The traditional method of constructing amps involved mounting the components on tag board
or fiberboard. This is the technique that is used for Trinity Amplifiers and is the recommended
approach for service and reliability.
Assembling the amp
Before You Begin
When you first receive your kit, remove all of the parts from the shipping box and place them
on a well-lit, clean surface. Check all of the parts against the parts list and verify that you have
everything before you begin. Contact us at once if you are missing anything, or if something
appears to be damaged
.
Tools
* 25 Watt, pencil tip soldering iron
* 60/40 rosin core solder (.032" dia)
* wire stripper
* wire cutter
* needle nose pliers
* screwdrivers (Philips, slot)
* multi-meter with minimum 500V range
Use a stand for the soldering iron, a sponge to keep the tip clean, de-soldering wick material
and clip leads. You should also have a multi-meter with at least 500V range, preferably 1000V
and an audible continuity checker. Try to get a multi-meter that measures capacitance. This lets
you verify the value of your components before you install them.
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