Description of Item:
This is the premier and only Phase Linear PL14 or PL20 Universal Control Board
Upgrade kit available on the web. It is a professional-class upgrade product,
meticulously engineered to look and perform better than the original.
Professional grade, "UNIVERSAL" PL14A/B + PL20 main audio board Upgrade Assembly
to enhance the quality of the components, circuit design and PCB on existing
Phase Linear 400 and 700B amplifiers - direct drop in kit for PL14 A & B and
PL20 equipped amps (the vast majority of all Phase Linear amplifiers). Design
flexibility allows you to build it out as "stock" or "enhanced" by populating
the component options you desire. Swap out the original single-sided PCB with a premium double-sided,
silk screened and solder masked circuit board. Upgrade to high quality, low noise, metal film, precision resistors and improved audio grade
Wima polypropylene and Cornell Dubilier (CDE) Mica (audio path) and Nichicon MUSE electrolytic capacitors (power supply
segments only) throughout. Improve the signal integrity of your amplifier.
Do you own a Phase Linear 400 Series 1 or 700B Amplifier (the ones with the 2 big
VU meters)? They are great amplifiers but the original control board is aging and
possibly not providing you the best possible sound performance anymore or has become
intermittent and unreliable. Here is your opportunity to replace the original control
board with a high quality, premium component equipped replacement and bring your
favorite Phase Linear amp back to its original glory. The complete kit
and assembled boards use Wima Polypropylene and Cornell Dubilier Mica non-polar
capacitors and Nichicon MUSE audio grade electrolytic polar capacitors to
replace the original ceramic and aluminum electrolytic types and precision, low
noise metal film resistors throughout to replace the original carbon film types.
This is a brand new, upgrade blank PCB kit to replace the original control board
(PL14A or B or PL20) with a premium grade replacement. This kit includes the bare
board and all electronic components except the 2N1304 and 2N1305 germanium transistors,
which can be harvested from your existing board or purchased separately from multiple
web sites. These transistors are no longer produced and are excluded from
the kit to keep the kit price reasonable. A link to the assembly instructions
and documentation is also provided. The components in the kit will be pre-formed
for you. The components you receive in the kit may differ slightly in appearance
from those pictured due to parts manufacturer changes.
You will get what you see installed on the PCB in the picture above:
- Brand new upgrade blank PCB to replace the original PL14 or PL20 PCB
- All 1/4 and 1/2W 1% metal film resistors
- All 2W 5% metal film resistors
- All potentiometers as Cermet type
- All non-polar capacitors as Wima Polypropylene (higher value NP caps) or as Cornell
Dubilier Mica (lower value NP caps)
- All polar capacitors as Nichicon MUSE audio grade electrolytics
- All Diodes
- All Transistors except the 2N1304 and 2N1305 germanium transistors (harvest from
your existing board or purchase new on web)
- All voltage regulator ICs
- All Aavid transistor heatsinks and transistor insulators
- All hardware
- Solid Copper Bus wire and Teflon tubing to allow tying power and ground for both
channels together
Detailed photographs, assembly parts list and "crystal clear" assembly and installation
instructions are located at this link below:
The printed circuit board is a high quality FR-4 based, epoxy-glass PCB with HASL
tin/lead plating on the solder pad areas replacing the original single-sided
PL-14 or PL-20 PCB. The replacement PCB is 0.062 inch thick double sided circuit
board with plated through holes and white epoxy silkscreen legends on the component
side and green solder mask on both sides. It is a direct drop in for the original
board size, using the original mounting hardware to secure it in the amplifier.
This replacement board includes holes to securely attach the amplifier wire connections
to the PL14_20 Control board rather than the original backside only solder connection
used by Phase Linear. This feature can be seen pictured in the photo. The original
wire attachment points would often separate from the PCB, ruining the board.
This upgrade kit is for skilled technicians. Building and installation of this kit
is more advanced than the other White Oak Audio Design kits. The installer
should be familiar and comfortable with working on electronic equipment and using
a soldering station and associated tools. Ensure good control of soldering iron
temperature, not exceeding 600 degrees F, so the PC Board and components are not
ruined by excessive heat. If you are not familiar with working on electronic equipment
or do not possess the proper equipment, it is recommended that you take your amplifier
to a service technician that can perform the LED Light Board Upgrade and installation
for you. Bare board only kits as well as assembled and tested versions of this LED
light board are available as well on the White Oak eStore.
Photos of the finished project are shown below (installed in chassis with original
PL14 PCBA component side showing for comparison, installed in chassis with original
PL14 PCBA solder side showing for comparison).
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This kit is sold AS-NEW with no returns (due to potential damage to the circuit
board once assembly has begun).
Ship From Zip Code: 01564
Shipping Weight:16 oz. for Complete Kit
or Assembly, 4 ounces for Bare Board.
White Oak Audio will pay USPS Small Flat Rate Box Priority Mail shipping charges
(but not insurance) within the continental 48 US states for Complete Kits and
Complete Assemblies. If you require other than
this mail service, buyer will be responsible for shipping charges by method selected
on the shipping weight stated above. If you do not pay for shipping insurance, delivery
will be made totally at buyer's risk for loss and damage. Bare boards will
be shipped in a bubble padded mailing envelope via USPS First Class Mail.
Your purchase will be professionally and neatly packaged for shipment within the
standard USPS Small Flat Rate Box. International orders are also welcome, shipping
charges are not included in the cost but generally are $8.25 extra to most international
destinations (contact us for a shipping quote to your destination).
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