A LOW-COST SINGLE-ENDED TRIODE AMPLIFIER
by Fred Nachbaur, Dogstar Music ©2002

Part 1:
Introduction
Part 2:
How It Works
Part 3:
Performance
Part 4:
Construction
Part 5:
Parts List
Part 6:
Sound Sample


5: PARTS LIST

created. 12/02
(Parts with Mode part numbers available from your local Mode distributor. These and links to other suggested sources are listed as possibilities only, and are not to be construed as endorsements for any specific products.)


PART DESCRIPTION NOTES
C ------ CAPACITORS
C1, C2 470 uF. 160 V electrolytic NTE NEVH series
C3 100 uF, 350 V electrolytic NTE NEVH series
C4, C5 470 uF, 35 V electrolytic NTE NEV series
C6 0.1 uF, 50 V mylar NTE MLR series
C7 0.015 uF 250V mylar NTE MLR series
C8 100 uF 10V electrolytic NTE NEV series

D ------ SEMICONDUCTOR DIODES
D1, D2 1N4007 or better silicon rectifiers
D3, D4 1N4002 or better silicon rectifiers
D5 1N4002 or 1N4148 or eq. silicon diode
D6, D7 LEDs, your colour choice Mode 55-552-0 to 55-555-0

J ------ CONNECTORS
J1 RCA jack, chassis-mount Mode 24-181-0
J2 Speaker connector Mode 58-098-0 or 58-099-0

R ----- RESISTORS
R1 100 ohm 1W 1/4W 5% unless noted
R2 47k 1/2W
R3 820
R4 470k
R5 1k
R6 100k audio taper potentiometer available from Radio Shack
R7 330 1/2W
* 5 ohm, 5W * only needed if 10EM7 used

SW ----- SWITCHES
SW-1 SPST mini rocker (power) Mode 46-143-0 etc.

T ------ TRANSFORMERS
T1 12V 2A power transformer Circuit Test 640-122
T2 12V 1A (or better) power transformer Circuit Test 640-121
T3 35:1 SE Output transformer (see text)

V ------ VACUUM TUBE (VALVES)
V1 13EM7, 13EM7/15EA7 or 10EM7 (* above) various suppliers

MECHANICAL PARTS

Enclosure, chassis, or other base structure
AC power cord and plug (Mode 31-021-0)
strain relief for power cord
Octal chassis-mount tube socket
1 pot knob (several types available from Mode)
mounting hardware (nuts, bolts, washers)
terminal strips, if applicable to construction method
hookup wire
shielded cable for connections to input jack
RTV silicone for mounting large electrolytics (if desired)

MiniBlok underside

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