Instruction manual

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J1 AC Mains Connector, PC-mounting; Switchcraft EAC303

J2 6-Position Barrier Block; PCD Co. ELFH06210 PC-mounting header

with ELFP06210 plug-in screw-terminal block.

J601-603 Connector, BNC chassis-mounting male; Amphenol 31-221

JMP1-4 Shorting “Shunt” for 0.1-inch header strip (open mfgr.)

L1 Inductor, fixed, 560µH; ACT Co. PA2-561K

L2 Inductor, fixed, 220µH; ACT Co. C4-221K

Q1,5,8,9 Transistor, NPN; (open Mfgr.) 2N3904

Q2,6,7 Transistor, PNP; (open mfgr.) 2N3906

Q3 Transistor, PNP; Motorola MJE350

Q4 Transistor, NPN; Motorola MJE340

Unless specifically noted by component reference designation below,

resistors are specified as follows:

a) Fixed resistors with values carried to decimal places implying a 1%

tolerance (example: 3.01K, 10.0K, 15.0K, 332K) are ¼-watt, 1% metal

film type.

b) Fixed resistors with values typical of 5% tolerance (example: 220,

3.3k, 10K, 270K) are ¼-watt, 5% carbon film type.

c) Multi-Turn Trimming Potentiometers (front-panel adjustable)

are Beckman 89PR series, Tokos RJC097P series, or equivalent

“cermet” types.

d) Single-Turn Trimmers (circuit board) are Beckman 91AR series or

Tokos GF06U1 series.

R57 Resistor, Variable, 5K; Piher PT-15-YB-5K with Fig. 3 spindle. Uses

Rogan 1R00A110BD001/PT-0-WL knob.

S1 Switch, DPDT Slide, Voltage Selector; C&K V202-12-MS-02-QA

S3-6 Switch, 2-position SPDT Miniature Toggle; C&K 7101-M-D9-A-B-E

S2 Switch, 3-position SPDT “Center Off” Miniatue Toggle;

C&K 7105-S-D9-A-B-E

S501 Switch, Power Rocker; Carling RA 911-RB-O-N

T1 Power Transformer, PC-mounting; Signal LP-20-600 or direct cross-

reference

Y1 Crystal 1.216MHz; SPECIAL - Inovonics Part No. 1242