Serviced & Modified TASCAM Porta 02 MKII Ministudio Multitrack 4-Track Cassette Recorder - Pitch Modded

TASCAM Porta 02 MKII Ministudio Multitrack 4-Track Cassette Recorder

Overview

This TASCAM Porta 02 MKII has been serviced, cleaned, calibrated, and tested, and is ready for use.

Recording and playback have been tested on all four tracks, and all core functions operate properly. A demonstration video is included with the listing showing recording and playback on all four tracks, along with the pitch modification in operation.

As with any analog cassette multitrack recorder, variations in frequency response and noise between tracks are normal.

The unit is in great cosmetic condition with normal signs of use.

The headphone knob is a little scratchy.

Pitch Modification

This recorder has been modified with an adjustable pitch knob.

Adjusting the pitch knob will allow you to slow down the recording and playback speed of the cassette. The pitch knob can be adjust so low that the motor stops moving. The knob is pretty sensitive but can produce some interesting results when messed with.

The modification is demonstrated in the attached video.

Service Performed

Each recorder is completely disassembled, serviced, reassembled, calibrated, and tested before being listed for sale.

Mechanical Service:

Complete disassembly, cleaning, and reassembly
Replaced all belts with factory equivalents
Treated pinch roller with rubber rejuvenator
Oiled the capstan bearing for lower wow and flutter
Oiled the motor bearing for a quieter motor and optimal performance
Rebuilt broken tape counter
Electrical Service:

Cleaned all switches, potentiometers, and faders
Cleaned and demagnetized the tape transport for optimal performance
Reflowed connector solder joints where needed to prevent intermittent connections caused by age and mechanical stress.
Recapped all 4 tracks
Recapped both MIC/LINE inputs
Resoldered broken LED
Repaired broken traces on mixer board
Calibration & Modification:

Calibrated tape speed, playback level, record level, and record bias to ensure accurate recording and playback.
Installed the pitch modification
Measured wow and flutter at approximately 0.14% RMS
Each unit includes a printed service form documenting any issues found, repairs performed, calibrations made, and the testing completed.