Quad 405 Op Amps 405-1 And 405-2

New Upgrade Components For Quad 405-1 or 405-2 Amplifier Boards. Update operational amplifier and retain existing gain. Suitable for any issue pcb in mark 1 or 2 Quad 405 amplifiers. High quality audio grade components. Brand New , Fresh stock and Unused. Clear instructions provided via email. Excellent well proven modification. Components Components sufficient for two boards in one Quad 405-1 or 405-2. Two of each component supplied unless stated. Operational Amplifiers. opa 134. Opamp Socket. gold plated contacts with 8 turned pins Capacitors. 100nf polyester(4) Resistors Metal Film 1%. 2k7(4) Saundries. Desoldering braid Manufacturers. Burr Brown Texas, Epcos, Tyco, Welwyn. Overview 3 old components on each pcb are replaced with new components. 2 new components on each pcb are added to the solder track side. PCBs 12565 issue 3 and all 12368 , C 3 capacitor 3,3 pf is removed. Task Assistance Work can be done one pcb at a time. PCB can be worked on within amplifier by removing end plates and lower cover. Aims Achieved Install a modern ultra low noise opamp. Improve supply rail decoupling. Maintain low shutdown noise in amplitude and hz. Performance Greater detail throughout frequency range. Presentation more refined and enjoyable. F.A.Qs What is the sequence of work ? Instructions give a remove and replace order in one list of components. This order has been designed to make the task as easy as possible. Check that the old removed component is the correct one. New components are bagged and identified including antistatic packaging if required. What antistatic precautions should I observe ? Touching/earthing at least two component wires/contacts at once whilst you have a static surplus will damage the opamp. Touching water taps, pipes or radiators readily discharges static. Using insulated pliers avoids completing the static circuit with your hands. Antistatic wristbands are a good investment. Combined postage available when buying several items. [BuyItNow] > [Continue Shopping] for each item you require Then await combined invoice from seller. Any combinations of the following group 405-1&2 small caps , 4148 , 10 ohm , 4003/75R , opamps , Evox Suppressor IGR , 15v Zener , Elna Stargets , NK 47/100uf TOTAL SHIPPING :- UK = £1.00 . EU = £1.65 . Rest/World = £2.20 Possible Upgrades For Printed Circuit Boards 12368 issue 5, or 6, 7 diode 4003 & resistor 75R , diode 4148 , zener 15v , resistor 10R 2w , opamps , input gain reduction , 405-1 board capacitors 12368 issue 9 with serial number below 29000 diode 4003 & resistor 75R , diode 4148 , zener 15v , resistor 10R 2w , opamps , input gain reduction , 405-1 board capacitors 12368 issue 9 with serial number above 28999 12368 issue 10 and 12565 issue 3 diode 4003 & resistor 75R , diode 4148 , resistor 10R 2w , opamps , input gain reduction , 405-1 board capacitors 12565 issue 5 diode 4003 & resistor 75R , resistor 10R 2w , opamps , input gain reduction , 405-2 board capacitors 12565 issue 6 and issue 7 resistor 10R 2w , opamps , input gain reduction , 405-2 board capacitors Issue numbers are marked on the printed circuit boards. Serial number silver plate is to the rear of the base plate in the centre. Paypal Only Please If Outside The UK

Quad 405 Op Amps 405-1 And 405-2