Description of Item:
New and improved with 6 LEDs for each meter! Provides more even illumination
than the original 4 LED version and the original PL17 incandescent version provided
by Phase Linear.
Premium version includes:
- An illumination brightness control for the meter LEDs
- A separate illumination brightness control for the logo LEDs
- An 8 position screw attachment wire connector to eliminate any need for soldering,
simply mechanical installation
Do you own a Phase Linear 700B Series Amplifier (the one with the 2 big VU meters)?
It is a great amplifier but maintaining the original incandescent meter light bulbs
that frequently burn out can be a real nuisance, Here is your opportunity to replace
the original light board with a high-quality, long-life LED powered replacement.
You will also notice that those cheap paper light baffles that were on the original
PL17 board are gone too!
This is a brand new, upgrade assembly to replace the original incandescent light
bulb board (PL17) with a long life, low power, LED based board assembly.
You get what you see in the pictures above
This is the premier Phase Linear PL 700 LED Lightboard upgrade kit on the web. It
is a professional-class upgrade product, meticulously engineered to look and perform
better than the original. This is the 3rd generation PL700B light board offering
from White Oak Audio Design, embodying and enhancing all of the improvements from
the prior 2 generations.
Features:
- 2 separate jumper or switched meter sensitivity settings
- Adjustable Meter illumination level
- Adjustable Logo illumination level
The light board allows you to select the meter sensistivity that you desire with
2 settings. The settings are:
- 0 dB (same sensitivity as the stock PL board setting) 100W = 0dB reading on
the meter scale.
- -20dB (5x as sensitive as the stock PL board setting) 10W = 0dB reading on
the meter scale.
These settings can be accomplished by either:
- Wiring in the 700B front panel level select switch to the correct 8 pin connector
locations, or
- Installing 2 jumpers in the appropriate position on the 8 pin connector
In addition to the light board assembly, you will receive:
- 4 - 6-32 hex nuts
- 6 - Tyraps to neaten up the wiring harness
- 8 - #6 Nylon washers to correctly space the height of your assembly within your
meters (there is some variability in the meters over the years that Phase Linear
was in production
There are 6 ultra-bright, wide dispersion LEDs for each meter providing a consistent
wash of light for meter illumination. You can choose warm-white, clear white or
blue LEDs for your application depending on which LEDs you specify.
There are 6 ultra-bright, wide dispersion, clear white LEDs for the Logo providing
a consistent wash of light for logo illumination.
All LEDs are powered with a forward current of up to 18mA to provide bright, pleasing
illumination while reducing the power requirements by over 80% from the original
board.
- A single potentiometer allows you to control the illumination intensity of all the
meter LEDs to your desired effect.
- A second potentiometer allows you to control the illumination intensity of all the
Logo LEDs to your desired effect.
This is the premier Phase Linear PL 700B LED Lightboard upgrade kit on the web.
It is a professional-class upgrade product, meticulously engineered to look and
perform better than the original.
This kit includes a brand new, upgrade blank PCB kit to replace the original incandescent
light bulb board (PL17) with a long life, low power, LED based board assembly. The
components you receive in the assembly may differ slightly in appearance from those
in the picture above due to parts manufacturer changes.
Detailed photographs, assembly parts list and "crystal clear" assembly
and installation instructions are located at this link below:
There are 6 ultra-bright, wide dispersion Warm White, White or Blue LEDs for each
meter providing a consistent wash of light for meter illumination. You can choose
LEDs from those colors for your application depending on your tastes.
The LEDs are powered with a forward current of up to 18mA to provide bright, pleasing
illumination while reducing the power requirements by over 80% from the original
board. An adjustment is provided for the Logo and Meter LED banks allowing you to
tweak with the illumination level to your desire.
A bridge rectifier is located in the center of the board surrounded on the left
and right with 2 filter capacitors. This combination provides a smooth, flicker-free
DC source for the LEDs. The cool running LEDs eliminate the heat associated with
the original equipment incandescent bulbs and last indefinitely. No more replacing
those hard to find bulbs and no more discoloration of the meter plastic due to the
excessive heat from the incandescent bulbs!!
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 cheap original single sided
PL-17 PCB. The replacement PCB is 0.062 inch thick double sided circuit board with
plated through holes and white epoxy silkscreen legending 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 secure and strain relieve the amplifier wire connections
to the LED Light board. This feature can be seen pictured in the photos. The original
PL17 wire attachment points would often separate from the PCB, ruining the board.
This upgrade kit is for skilled technicians. While building and installation is
not a difficult procedure, 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 LED Light Board is 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.
Photos of the finished project are shown below.
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