HighTom:
Here is the part list of Hightom, prepare all components before assembly:
Image | Description | Part | Value | Qty |
Polyester capacitor (2A473J) | C98 | 47n | 1 | |
Polyester capacitor (2A272J) | C99 | 2.7n | 1 | |
Polyester capacitor (2A333J) | C100, C108 | 33n | 2 | |
Polyester capacitor (2A273J) | C101, C103 | 27n | 2 | |
Polyester capacitor (2A103J) | C102 | 10n | 1 | |
Polyester capacitor (2A223J) | C104 | 22n | 1 | |
Polyester capacitor (2A562J) | C105 | 5.6n | 1 | |
Polyester capacitor (2A102J) | C110 | 1n | 1 | |
Electrolytic capacitor | C109 | 33/25 | 1 | |
Diode | D59, D60 | 1N4148 | 2 | |
Germanium Diode | D84, D85 | 1N60 | 2 | |
NPN Silicon Transistor | Q56, Q58 | 2SC945 | 2 | |
PNP Silicon Transistor | Q57 | 2SA733 | 1 | |
1/4w Carbon resistor | R267, R277, R278, R282 | 22K | 4 | |
1/4w Carbon resistor | R268, R271 | 10K | 2 | |
1/4w Carbon resistor | R269, R270, R274, R279 | 4K7 | 4 | |
1/4w Carbon resistor | R272 | 3K3 | 1 | |
1/4w Carbon resistor | R273 | 15K | 1 | |
1/4w Carbon resistor | R275, R283, R285 | 33K | 3 | |
1/4w Carbon resistor | R276 | 2M2 | 1 | |
1/4w Carbon resistor | R280 | 1K5 | 1 | |
1/4w Carbon resistor | R281 | 5K6 | 1 | |
1/4w Carbon resistor | R284, R286 | 820K | 2 | |
1/4w Carbon resistor | R287, R294 | 1K | 2 | |
1/4w Carbon resistor | R288, R289 | 100K | 2 | |
1/4w Carbon resistor | R290 | 47K | 1 | |
1/4w Carbon resistor | R291 | 470K | 1 | |
4PDT switch | SW10 | 1 | ||
Dual Operational Amplifier | U18 | µPC4558C | 1 | |
Potentiometer (A104) | VR14 | 100KA | 1 | |
Potentiometer (501) | VR15 | 500R | 1 |
Make it:
![]() | Here is the Hightom. |
![]() | Solder all resistors. Solder each value one after the other. |
![]() | Solder D59,D60 diode 1N4148 and germaniums diodes MAKE SURE DIODES ARE IN THE RIGHT WAY |
![]() | Solder polyesters capacitors |
![]() | Solder C109 electrolytic capacitor MAKE SURE ELECTROLYTICS CAPACITORS ARE IN THE RIGHT WAY
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![]() | Solder transistors.Do not get confused between 2SA733 and 2SC945 it is not the same transistors.
MAKE SURE TRANSISTORS ARE IN THE RIGHT WAY |
![]() |
Connect the power transformer. Test 4558 power supply before solder. The green dot is-15V, the red dot is 15 V (plus or minus 5%). You have the ground on the potentiometer big square pad . Always check that the four wires from the power supply is well connected.
THEN DONT FORGET TO DISCONNECT THE POWER TRANSFORMER. DO NOT SOLDER COMPONENT AS THE CIRCUIT IS POWERED ! |
![]() | Finally return the PCB and solder potentiometers on the opposite side of components. To assembly the switch, solder one leg of the switch and before soldering the other check that it is well pressed against the PCB. DO NO WRONG IN THE VALUES OF POTENTIOMETERS, BOTH POTENTIOMETERS ARE DIFFERENT. You can then go to Rimshot assembly |
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