AkitikA PAT-4, Инструкция по сборке, Страница: 4 / 24

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Section 1: About This Manual
This manual gives the information you need to build and install the PAT-4 Phono Preamp
Replacement (and Upgrade), part number PAT4PPR, into your Dynaco PAT-4 Preamp.
As of this writing, the following other PAT-4 upgrades are available from
Updatemydynaco, a division of Akitika LLC:

Blue Light Kit (BLUE)

Line Amp Distortion Reducer (DRD4)

Tone Control Switch (TCS)

Electronically Regulated Power Supply (PAT4PWR)

Line Stage Replacement Components (P4LSRC)

Phono section upgrade (PAT4LP)
In my opinion, this kit, the PAT4PPR is preferable to the PAT4LP, even though the
PAT4PPR costs more. Why?

The PAT4PPR kit is easier to build and install than the PAT4LP kit.

The PAT4PPR kit has a tight layout with ground-planes and bypass capacitors
that give it great high-frequency stability and noise rejection.

The PAT4PPR kit has a built-in second order high-pass filter that minimizes the
woofer wobble caused by record warp.

The PAT4PPR kit has a built-in second-order lowpass filter that makes it much
less likely to pick up external signals like switching transients and radio stations.

The PAT4PPR is installed much farther from the power supply, so picks up much
less of the stray hum fields inside the PAT-4. This makes it very quiet and free of
hum. The only hum you will pick up comes from the phono cables outside of the
PAT-4.
Note: the phono upgrade kit requires the PAT4PWR supply to be installed.
Who Should Attempt these Projects?
You can build this kit if you can:
1. solder (using normal rosin core solder and a soldering iron),
2. use simple hand tools like screwdrivers, wire cutters, and pliers, and
3. Read and follow directions.
It helps if you:
1. know a bit about electronics, or
2. have a friend who knows a bit about electronics
3. can get to YouTube to watch a few helpful videos about the assembly process (not
available as of this version of the manual)
Tools and Supplies You’ll Need
You’ll need the following tools:
1. flat blade screwdrivers for #4 and #6 screws, #2 Philips head screwdriver
2. a power drill with a 9/64” drill bit. A center punch is also helpful, as you will be
drilling two holes into the bottom of the PAT-4 Chassis.