
BUILD YOUR OWN ZEN TRIODE AMP WITH THIS
CIRCUIT BOARD
We took our original Zen Triode amp, model
SE84C, and reproduced it on a high quality well thought out circuit
board! Purchase your own parts (shown below) and be
listening to your very own SET amplifier!

APPROX PARTS COST IS $170 + BOARD
($45)

Shown completed and screwed to your favorite
chunk of wood.
You supply your own parts - putting
you in charge of the sound quality and performance.
We recommend
the following power transformers for this amplifier:
120V POWER TRANSFORMER
EDCOR
- XPWR107-120
Power transformer for a 120V, 60Hz. line to 600V (300-0-300) at 150mA
center tapped and 6.3V at 4A.
Approx cost $58 (JUNE 2011)
240V POWER
TRANSFORMER
EDCOR -
XPWR066-240
Power transformer for a 240V, 50/60Hz.
line to 600V (300-0-300) at 200mA center tapped, 6.3V at 4A and 5V at
3A.
Approx cost $64 (JUNE 2011) |
OUTPUT
TRANSFORMERS
EDCOR
- GXSE10-6-8K
10W, single ended tube output transformer for 8K Ohms to 6 Ohms.
Approx cost $27 (JUNE 2011)
|
SUGGESTED PARTS FOR CIRCUIT BOARD
1
|
Mouser
#: 75-516D108M035-E3
Mfr. #: 516D108M035PS6AE3
Manufacturer: Vishay
Desc.: Aluminum Electrolytic Capacitors - Leaded
1000uF 35volts 20%
RoHS: RoHS Compliant
|
2
|
Mouser
#: 647-TVX2W330MCD
Mfr. #: TVX2W330MCD
Manufacturer: Nichicon
Desc.: Aluminum Electrolytic Capacitors - Leaded
450volts 33uF 18x41 20%
RoHS: RoHS Compliant
|
2
|
Mouser
#: 75-TVA1508
Mfr. #: TVA1508
Manufacturer: Vishay
Desc.: Aluminum Electrolytic Capacitors - Leaded 250V
20UF
RoHS: No
|
4
|
Mouser
#: 539-150104J400EC
Mfr. #: 150104J400EC
Manufacturer: Cornell Dubilier
Desc.: Polyester Film Capacitors 400V .1UF METAL POLY
RoHS: RoHS Compliant
|
2
|
Parts
Express #: 027-544
Mfr. #: 3.3uF 400V
Manufacturer: Solen
Desc.: polypropylene capacitors
RoHS: No
|
3
|
Parts
Express #: 055-540
Mfr. #:
Manufacturer:
Desc.: PC mount 9-pin miniature ceramic tube socket.
Gold plated pins.
RoHS: No |
2
|
Parts
Express #: 090-475
Mfr. #:
Manufacturer: Cliff
Desc.: Standard .75" dual binding posts made for
chassis mounting
RoHS: No |
2
|
Mouser
#: 161-4217 or 568-NYS354
Mfr. #: 161-4217
Manufacturer:
Desc.: Phono (RCA) Connectors PHONO R/A PCB
RoHS: No
|
1
|
Mouser
#: 313-1240F-100K
Mfr. #: RV122F-20-15F-A100K
Manufacturer: Alpha (Taiwan)
Desc.: Panel Mount Potentiometers Audio D-Shaft 100K
RoHS: RoHS Compliant
|
1
|
Mouser
#: 262-6.8K-RC
Mfr. #: 262-6.8K-RC
Manufacturer: Xicon
Desc.: Metal Oxide Resistors 6.8Kohms 5% Tol
RoHS: RoHS Compliant
|
1
|
Mouser
#: 71-CW5-1.0K
Mfr. #: CW0051K000JB12
Manufacturer: Vishay
Desc.: Wirewound Resistors - Through Hole 5watts
1Kohms 5%
RoHS: No
|
2
|
Mouser
#: 71-RL20S-G-1.5K/R
Mfr. #: RL20S272GRE5
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/2watt
1.5Kohms 2%
RoHS: No
|
2
|
Mouser
#: 71-RL20S-G-2.7K/R
Mfr. #: RL20S272GRE5
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/2watt
2.7Kohms 2%
RoHS: No
|
4
|
Mouser
#: 71-RN65D-F-1.0K
Mfr. #: RN65D1001FB14
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/2watt
1Kohms 1% 100ppm
RoHS: No
|
2
|
Mouser
#: 280-CR5-10K-RC
Mfr. #: 280-CR5-10K-RC
Manufacturer: Xicon
Desc.: Wirewound Resistors - Through Hole 10Kohms 5%
Tol
RoHS: RoHS Compliant
|
2
|
Mouser
#: 625-RGP10M-E3
Mfr. #: RGP10M-E3/54
Manufacturer: Vishay
Desc.: Diodes (General Purpose, Power, Switching) 1.0
Amp 1000 Volt
RoHS: RoHS Compliant By Exemption
|
1
|
Mouser
#: 71-CP0005150R0JE14
Mfr. #: CP0005150R0JE14
Manufacturer: Vishay
Desc.: Wirewound Resistors - Through Hole 150ohms 5%
5watts
RoHS: RoHS Compliant
|
2
|
Mouser
#: 66-RC20GF473J
Mfr. #: RC20GF473J
Manufacturer: IRC
Desc.: Carbon Composition Resistors 47K OHM 5%
RoHS: RoHS Compliant
|
2
|
Mouser
#: 660-MO2CT631R102J
Mfr. #: MO2CT631R102J
Manufacturer: KOA Speer
Desc.: Metal Oxide Resistors 2W 1K 5%
RoHS: RoHS Compliant
|
9
|
Mouser
#: 561-L41.0
Mfr. #: 561-L41.0
Manufacturer: Eagle Plastic Devices
Desc.: Circuit Board Hardware - PCB SPCR HEX 4-40X1.0
RoHS: RoHS Compliant
|
2
|
Mouser
#: 273-330K-RC
Mfr. #: 273-330K-RC
Manufacturer: Xicon
Desc.: Metal Film Resistors - Through Hole 1/2watt 330Kohms 1%
RoHS: No |
2 |
Mouser
#: 71-RN65D-F-100
Mfr. #: RN65D1000FB14
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/2watt
100ohms 1% 100ppm
RoHS: No |
WARNING
-
THIS
KIT IS FOR EDUCATIONAL PURPOSES ONLY AND CAN NOT BE USED IN A
RESIDENTIAL HOME WHERE CHILDREN OR PETS CAN COME IN CONTACT WITH THE
HIGH VOLTAGES PRESENT. FOR HOME USE IT MUST BE BUILT INSIDE A
METAL CHASSIS.
|
EASY TO CONSTRUCT

Start by using your board as a template to
mark the holes on your wood.

Drill your holes.

Stain your wood.

Build the circuit board

Set your standoffs

Screw the amp to the board

Install the transformers, tubes and enjoy!
ASSEMBLY INSTRUCTIONS
SCHEMATIC
AMPLIFIER OVERVIEW:
It is a 2 watt x 2 SET amplifier. It is based
around the 6P15P-EV aka SV83 output tubes which are one of the more
linear tubes in the world. It was chosen over 300B, 2A3, 45's and so-on
because of it's incredible speed and sonics.
This amplifier has only 1 capacitor and 2
resistors in the main signal path. Unlike other SET amps this one
loves low impedance's and increases in power all the way down to 2 ohms
with outstanding dynamics. Wonderfully overbuilt with transparency and
believable 3D imaging. Near perfect timbre and unparalleled detail
are just some of the areas larger more expensive amplifiers fall short
on by comparison.
BRIDGING INTO MONO:
These amplifiers employer a unique floating
output transformer scheme where the negative speaker wire is not tied
to chassis ground. That means when the amp is bridged, both channels
may either be series or parallel wired. In series, both channels
work as one and transparency is preserved. In parallel as with
most amps, the differences between the two channels work against each
other and a slight reduction in transparency is seen.
So with no drawbacks to running the amps in
mono, you can expect 6 dB of additional power rather then the expected
3dB. This is thanks to the power increase the amp has when it sees
lower impedance's.
IDEAL SPEAKERS:
We have successfully driven hundreds of
different loudspeakers ranging in efficiency from 90 to 100dB 1w/1m. On
90dB speakers it works nicely in smaller rooms or for late night out of
body experiences. 94 to 96 dB speakers are ideal in that
they let you play beyond a normal listening level and preserving the
dynamic headroom. When these amplifiers were first released in 1997
there were a minimal number of "high efficiency" speakers to choose
from. Today that is no longer the case - they are everywhere. We also
offer several different types of loudspeakers that
will work with this amp.
SPECIFICATIONS:
This amplifier requires no adjustments
or maintenance other than changing tubes every couple years. It is a
self biasing design and self balancing meaning even unmatched tubes can
be used with decent results. The SV83 (6P15P-EV) or EL84 output
tubes
wired in triode were chosen over 300B, 2A3, 45, and other triodes for
having the best sound and imaging.
Circuit type
|
|
Single ended
Class A
Triode |
Power output
|
|
2.3 watts
RMS into
4 ohms |
|
|
5 watts
RMS into 8
ohms when bridged |
|
|
NOTE: Power
increases as
ohms decrease |
|
|
Stable into 2
ohm
speaker loads |
Input voltage
|
|
2.0 volts for
full output |
Noise / Hum
|
|
Less
than 1.5
millivolts |
Response |
|
See Edcor transformers
|
Feedback |
|
ZERO negative
feedback
used |
Output tubes
|
|
SV83 or
EL84/6BQ5 |
Signal tube
|
|
6N1P or 6922 or
6Dj8 |
Biasing
|
|
Self-Biasing
circuit
-
never needs adjustment |
Consumption
|
|
65 watts at
full power |
Speaker sensitivity @ 1w/1m |
|
89
dB
minimum
/ 96 dB is ideal |
TUBES:
This amp is designed for premium quality
N.O.S. 6P15P-EV output tubes rated at 5000 hours. These Russian
military spec tubes are the top grade of what we came to know in this
country as the SV83. You can also use EL84's without adjustments
of any kind. You'll find the SV83's to be unparalleled in speed and
detail - in part because it is a video tube with much wider bandwidth
then a normal audio tube. We think these are the best sounding
most transparent tubes available today. The EL84 (6BQ5) is a bit
warmer sounding giving the amp a different signature by just switching
output tubes.
The input tube is a single 6N1P, 6922 or 6DJ8
- your choice. 6N1P's have the warmest tone, 6922's have the best
dynamics, 6DJ8's have the most air and micro-detail with a touch less
bass. Again, a powerful tool for voicing your amplifier to your
particular tastes.
PRICING
ZKIT1-BO
|
$45.00
|
ADD TO CART
|
Circuit board only (Instructions are located below.)
|
ASSEMBLY INSTRUCTIONS
MADE IN USA
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|