Heathkit HP 1144 Manual 2

Page 1

Modification Kit
for the

HP-1144 POWER SUPPLY

Model 830-33

The purpose of this Modification Kit is to prevent an
overvoltage condition to your SB-104 Transceiver by
adding a crowbar circuit to your PIP-1144 Power Sup-
ply. If the output voltage from the Power Supply
should exceed a safe voltage for your SB-104. the
crowbar circuit will blow the 20-ampere fuse.

595-2219

Page 2

Page 2

.HEATHKIT ~~

PARTS LIST

Check each part against the following parts list. The
key numbers refer to the parts shown below. Any part
that is packed in an envelope with a part number on it
should not be removed from the envelope until it is
called for in a step. Some parts are marked with a
171-" number. These numbers are for our use in
packaging and do not appear in the Manual. Save all
packaging material until you locate all the parts.

KEY HEATH QTY. DESCRIPTION CIRCUIT KEY HEATH QTY. DESCRIPTION CIRCUIT
No. Part No. Comp. No. No. Part No. Comp. No.
RESISTORS TRANSISTORS - INTEGRATED CIRCUIT (IC)
A1 6-6819-12 1 58.1 Q. 1%. 4.1 (blue- R5 NOTE: Transformers and ICs are marked for identification in
gray-brown-gold-brown) one of the following four ways:
A1 6-5110-12 1 511 0, 1%, 1/4-watt (green- R3 1 Part numbers
brownrbrown-black-brown) 2. Type number. (For ICs. this refers only to the letters
A1 6'9090'12 l 909 0' 1°/°' 1/4-watt ("me R6 and numbers listed. Disregard any other letters or
black-white-black-brown) numbers on the IC.)
A1 6402-12 2 1000 Q. 5°/o. 1/4-watt R8, R10 3 Part number and type number.
(brown-black-red-gold) 4. Part number with a type number other than the one
A1 6-103-12 1 10 kfl. 5%. 1/4-wat1 R9 listed.
(brown-black-orange-gold)
A2 6220 2 22 0. 5%. 1/2-watt R7. R11 01 417-823 1 MPU131 transistor 05
(red-red-black-gold) 02 417-21 5 1 2N3055 transistor 03
A3 1-30-2 1 270 D. 10%. 2-watt R12 D2 417-254 2 MJ802 transistor 01. 02
(red-violet-brown-silver) 03 442-626 1 78MGT4 IC U1
A3 1-14-2 1 1500 Q. 10%. 2-waIt R13
(brown-green-red-silver)
A4 10-383 1 10 k!) control R4 HARDWARE
CAPACITORS E1 250-89 2 6-32-3/8" screw
E2 252-3 2 6-32 nut
81 21-195 1 .1 p.F ceramic 03 :2 2:383 ; xlbszaztsher
32 25257 1 1° F may 04 55 254-14 1 1/4" Iockwasher
83 25499 1 500 p.F electrolytic C10 E6 2594 1 #6 solder lug
83 25-241 1 1200 F electrolytic C6 E7 25943 1 Large solder lug
B4 27-47 1 .1 pF Mylar CS, C7. C8. CS E8 259_20 1 Connector pin
DIODES
WIRE
C1 5666 1 1N4149 D3
C1 56-620 1 15V zener D4 340-11 36" Bare wire
Ct 57-65 2 1N4002 D1, D2 344-31 24" Brown wire
C2 57-86 1 NL576A SCFI 04 346-4 30" Black sleeving
O 1/ V2 3/. 1 (INCHES) 2 3 4 5 6 7
lfti'lsf'ttml.1;l.t.l;1.l.t.lli itll; l;lml.1*inl l i.l1~_l
|""""'ITII 'I'II'ITI'ITTTI'I IrtTrr
O 5 I (CM) 2 a 4 a o 7 a 9 1o 11 12 13 1o 15 to 17

To order a replacement part, use the Parts Order Form
furnished with this kit. If a Parts Order Form is not
available, refer to Replacement Parts inside the rear
cover of this Manual. For prices. refer to the separate
Heath Parts Price List." NOTE: Never use a 171-
packaging number if you must order a replacement
part; use only the part numbers listed in the Parts List.