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Audio and Video Talk
The Vintage Audio Section
NAD 3020 series 20
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<blockquote data-quote="marantz123" data-source="post: 1123683" data-attributes="member: 16849"><p>There are differing layouts for the 3020 series 20. The unit here is the early model with a PCB fitted to the inner back panel and the main pcb has the 4x 2200uF capacitors to the left of the heatsink. (The model following this doesnt have the mentioned PCB, and has the 4x 2200uF capacitors above the heatsink in the centre of the main board). Both of these are the series 20. (Later models are the 3020A and 3020B). </p><p></p><p>Show us a photo of where this resistor is in your amplifier, someone could probably pop the cover on their amp (this is the 1978 "first impression" model) and confirm the resistance value for you.</p><p></p><p>Resistors also perform a safety function, where above their wattage rating (if it is exceeded) they are expected to fail. If a higher wattage part is used, then more power and heat results when a fault occurs in its circuit, takes longer to fail, causes more damage and possibly a fire. Stick to the recommended wattage rating and resistor types.</p></blockquote><p></p>
[QUOTE="marantz123, post: 1123683, member: 16849"] There are differing layouts for the 3020 series 20. The unit here is the early model with a PCB fitted to the inner back panel and the main pcb has the 4x 2200uF capacitors to the left of the heatsink. (The model following this doesnt have the mentioned PCB, and has the 4x 2200uF capacitors above the heatsink in the centre of the main board). Both of these are the series 20. (Later models are the 3020A and 3020B). Show us a photo of where this resistor is in your amplifier, someone could probably pop the cover on their amp (this is the 1978 "first impression" model) and confirm the resistance value for you. Resistors also perform a safety function, where above their wattage rating (if it is exceeded) they are expected to fail. If a higher wattage part is used, then more power and heat results when a fault occurs in its circuit, takes longer to fail, causes more damage and possibly a fire. Stick to the recommended wattage rating and resistor types. [/QUOTE]
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Audio and Video Talk
The Vintage Audio Section
NAD 3020 series 20
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