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Parts Database

Replacement Components and Substitutions

Search by marking, replacement type, or supplier ID. Verification status makes it clear whether an entry is bench-proven, community-tested, or still provisional.

Main power reservoir capacitor (4700uF / 50V class)

Community Verified

Original Marking

4700uF 50V radial electrolytic (legacy OEM variant)

Replacement

105C low-ESR radial capacitor, matched lead spacing

DigiKey

P12345-ND

Open listing

Mouser Alt

647-UPW1H472MHD

Categories

Amplifier, Special Series

Fit / Package / Pinout

Fit: Confirm can height clearance under top cover before ordering full sets.

Package: Radial; verify lead spacing against PCB holes.

Pinout: Observe positive/negative orientation by silkscreen and trace review.

Electrical Notes

Voltage: Use equal or higher voltage margin than original component.

Temperature: Prefer 105C parts for long-term thermal durability.

ESR: Low ESR recommended for supply rail ripple handling.

Polarity: Electrolytic polarity critical. Install backwards only once and damage is likely.

Dual op-amp for preamp / crossover stage

Proposed

Original Marking

Legacy dual DIP-8 op-amp (marking varies by production run)

Replacement

Low-noise audio op-amp DIP-8

DigiKey

P23456-ND

Open listing

Mouser Alt

595-OPA2134PA

Categories

Amplifier, Equalizer / Processor / Crossover

Fit / Package / Pinout

Fit: Socketing is optional but useful for A/B verification and future servicing.

Package: DIP-8 through-hole.

Pinout: Pin-compatible only. Verify no compensation network conflicts.

Electrical Notes

Voltage: Check supply rails and absolute max ratings before substitution.

Temperature: Standard industrial grade generally sufficient.

ESR: Not applicable.

Polarity: IC orientation notch must match silk outline.

Bias / offset adjustment trimmer

Needs Revision Check

Original Marking

Single-turn open trimmer, value depends on board revision

Replacement

Sealed multi-turn cermet trimmer

DigiKey

P34567-ND

Open listing

Mouser Alt

652-3296W-1-102LF

Categories

Amplifier

Fit / Package / Pinout

Fit: Body height and lead footprint must match clearance and board orientation.

Package: Through-hole trimmer.

Pinout: Lead arrangement differs between styles; verify before soldering.

Electrical Notes

Voltage: Use equivalent power and voltage rating to legacy part.

Temperature: Sealed cermet improves long-term adjustment stability.

ESR: Not applicable.

Polarity: Not polarity sensitive.

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