Heathkit Gr 1290 Manual
Parts list ICs: • U1: CA3130S (BiMOS Operational Amplifier) • U2, U3: LM308 (Precision operational amplifiers) • U4: LM2901 (Quad Single Supply Comparator IC) Transistors: • Q1, Q4, Q9, Q10, Q11, Q12: MPSA20 (NPN 40V 100mA) • Q2, Q7, Q8, Q13: MPSA55 (PNP 60V 500mA) • Q3, Q5: 2N4117 (N-channel JFET transistors) • Q6: MPSA13 (NPN Darlington transistor) Diodes: • D1, D3, D4: 1N4149 or 1N4148 (switching diodes) • D2: 1N5230B (4.7V, 0.5W Zener Diode) Notes All resistors are 1/4 watt, 5% tolerance and all capacitors are in microfarads (uF) unless marked otherwise. Voltages were taken with a 9 Volt supply and a setting with no sound coming from the speaker. The controls were set as follows: • Volume -- fully counterclockwise • Pushbutton tune -- center of rotation • Discriminate -- center of rotation • Audio Tune -- center of rotation The original coil that came with the Heathkit project was preassembled at the factory. It had a diameter of around 15cm (6 inch).
A larger (30cm, 12inch) coil can be made using the following data: L1 = 300mm diameter, 90 turns,.4mm wire L2 = 140mm diameter, 90 turns,.4mm wire L3 = 130mm diameter, 550 turns,.1mm wire.
Heathkit gd-1290 Is Similar To: Manual Assembly Heathkit Aa-29 (21.4% similar) Fold outs like block diagram and schematic are in good condition. Additionally some of the parts list are mark in pen. Includes an insert page concerning fuses and a order form. Good condition. Heathkit gr 151a transistor radio schematic [55 KB] heathkit gr 151b transistor radio [175 KB] heathkit gr 1290 groundtrack vlf metal detector (schematic) [754 KB]. This is the manual page for Heathkit. Here you will find instruction manuals, service manuals, user guides schematic, brochures etc.
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Heathkit Gr 1290 Manual Pdf
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