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Marantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed - $1,650 (Corvallis)

Marantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 1 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 2 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 3 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 4 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 5 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 6 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 7 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 8 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 9 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 10 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 11 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 12 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 13 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 14 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 15 thumbnailMarantz 2238B Stereo Receiver ~Restored, Rebuilt & Guaranteed 16 thumbnail
condition: like new
make / manufacturer: Marantz
model name / number: 2238B Stereo Receiver
1978 Marantz 2238B Stereo Reciever. This is in excellent near-mint 95%+ cosmetic condition and has just been fully restored and rebuilt in January/February 2024. All functions are in perfect working order and guaranteed. This unit is like new and performs better than new with new, up-to-date modern parts and should give another 20 years + of no-problem usage. I will be happy to demonstrate this unit to a prospective buyer's satisfaction. Please see below for a comprehensive list of all work done. All replaced parts are included. I am located near Corvallis Oregon. NO TEXTS! I only reply to email queries that include the sender's name and telephone number.

Full replacement of all electrolytic capacitors and increasing values of main rail filters

Replaced the four trimmers used to adjust bias voltage and DC offset with Bourne high-precision trimmers

Replaced all of the round body diodes and varistors with modern silicon diodes

Fully rebuilt the power supply including all resistors that have heat stress, replacement of all zener diodes, and all large power transistors

Replaced the transistors in the drive circuit with low-noise modern transistors, matched differential pairs, pre-drivers, and drivers.

Replaced all output transistors with superior modern devices from Onsemi, MJ21195G (PNP) and MJ21196G (NPN)

Replacement of all transistors known to become faulty with time

New thermal compound and mica insulators on all devices mounted to a heatsink

Break down and polishing of the speaker protection relay contacts

Cleaning of all of the potentiometers and switches using Deoxit D5 or F5 depending on the control

Adjustments of power supply regulated voltage, output bias voltage, and DC offset.

48-hour minimum burn-in, power measurement, and measurement on the audio analyzer to measure THD, THD+N, and frequency linearity to confirm it met or exceeded factory spec.

Cleaning of the chassis, faceplate, and knobs.

post id: 7746049075

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