Heathkit HD-1410 Скачать руководство пользователя страница 1 | Manualshive

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Heathkit HD-1410 Скачать руководство пользователя страница 1

HEATHKIT

HD-1410

ELECTRONIC KEYER

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Содержание HD-1410

Страница 1: ...HEATHKIT HD 1410 ELECTRONIC KEYER ...

Страница 2: ...peaker with adjustable tone and volume Headphone jack an the rear panel that silences the speaker Receiver audio is fed to the head phones by a separate rear panel jack Built in paddles have excellent feel and easily adjustable for tension and travel Solid state output eliminates the bounce and sticking problems associated with relays Weighted cabinet to prevent the keyer from sliding on the opera...

Страница 3: ... dash When you want to send the letter A tap both paddles quickly but be sure you close the dot contact slightly before you close the dash contact You will have to form some letters such as P X E and T just as you would with a single paddle keyer You should practice operating the Electronic Keyer for some time before you use it on the air You will find this Electronic Keyer to have a different fee...

Страница 4: ... Paddle tension Paddle travel Rear Panel Connections Power cord Keyer output Headphones External 12 Volt Receiver audio External key Solid State Complement Diodes 5 1N4002 silicon 3 GD510 germanium 2 1N2071 silicon 1 1N709A zener Transistors 1 X29A829 PNP 3 MPS A20 PNP 1 MPS D51 PNP 2 MPS A42 NPN 1 D40C1 Darlington Integrated circuits 2 7400 Quad 2 input positive NAND gate 1 7402 Quad 2 input posi...

Страница 5: ... transistors Q1 Q2 and their associated circuitry When IC1 pin 8 is high the clock is disabled Capacitor C3 charges through diode 01 and biases Q1 off With Q1 off the base of Q2 is high Therefore Q2 is also off and the clock output is low Note that the high on IC1 pin 8 is also applied through D2 to IC4 pin 5 When IC1 pin 8 goes low bit being sent IC4A changes state D1 is then back biased and C3 b...

Страница 6: ...nerator be gins to form a dash since IC4 pin 2 is high PRESENT BIT MEMORY PBM Note that IC3A and B form an R S flip flop which depending on its state causes the bit generator to form dots or dashes äs described in the section on the bit generator RESET CIRCUITRY At the end of a bit whether dot or dash the PBM must assume the state of the next bit to be sent This is accomplished by the reset circui...

Страница 7: ...l the trailing edge of the clock pulse Were it not for the delay IC2 pins 9 and 10 would be high and the low on IC2 pin 8 would remove the dash from this memory if one were stored there OUTPUT CIRCUITRY When IC3 pin 12 goes high mark condition it turns on the Darlington pair transistors Q6 and Q7 which will key positive tines to ground Transistor Q4 also turns on thus turning on transistor Q5 and ...

Страница 8: ...BLOCK DIAGRAM ...

Страница 9: ...ircuit component number R15 C3 etc on the X Ray View or Chassis Photograph B Locate this same number in the Circuit Component Number column of the Parts List C Adjacent to the circuit component number you will find the PART NUMBER and DESCRIPTION which must be supplied when you order a replacement part Viewed from foil side ...

Страница 10: ... Viewed from component side ...

Страница 11: ...CIRCUIT BOARD VOLTAGE CHART Viewed from foil side ...

Страница 12: ...CHASSIS PHOTOGRAPH MOD FROM HINTS AND KINKS TO CHANGE RANGE TO 8 35 WPM AND MAKE SPEED CONTROL LESS CRITICAL PLACED 5k6 IN SERIES WITH R9 SHUNT SPEED CONTROL WITH 33k ...

Страница 13: ......

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