 | |  | |  | |  | |  | |  | |  |
 | |  | |  | |  | |  | |  | |  |
 | |  | |  | |  | |  | |  | |  |
| BARRY'S 8 TRACK REPAIR |
| NOS (New Old Stock) 8 Track and Cassette Motors |
| Important notes about Barry's 8 Track Repair motors: Finding a direct, drop-in replacement motor for an 8 track or cassette machine these days is EXTREMELY rare, due to the fact that there are only a few NOS models still available. In almost all cases, the best you can do is to get one with the required RPM and direction of rotation, and put your fabrication and handyman skills to work to make it fit. Sometimes you get lucky, and can replace the actual motor inside the existing metal housing. In other cases, you may need to drill holes in the chassis, invent a mounting bracket - whatever it takes to make it fit. Though these are all BRAND NEW, NEVER INSTALLED motors, they are all basic DC motors, some with internal pulse generators. They will not work in Wollensak, Akai, Delco or most extreme high-end audiophile equipment due to the special motors used in these machines. MOTORS ARE GUARANTEED FOR ACCURATE RPM AND SPEED CONSISTENCY ONLY ! IT IS THE CUSTOMER'S RESPONSIBILITY TO DETERMINE HOW TO MAKE IT FIT. WITH A REASONABLE DEGREE OF HANDYMAN SKILLS AND COMMON TOOLS, IT CAN BE DONE. ALL MOTORS ARE TESTED BEFORE SALE, AND A STATEMENT OF ACTUAL RPM PROVIDED. SUBJECTING A MOTOR TO EXCESSIVE HEAT (SUCH AS TRYING TO SOLDER ON THE CASE), PHYSICAL ABUSE (SUCH AS SHARP TAPPING) OR TAKING IT APART VOIDS ITS WARRANTY. |
To order a motor, you will need to know the DIRECTION OF ROTATION and REQUIRED RPM. If your pulley and flywheel are on top, you will need a motor with CCW rotation. If the pulley and flywheel are "upside down", you will need a motor with CW rotation. If in doubt, simply send me an image of the inside of your machine. To determine required RPM: If your motor still runs but speed is inconsistent and you have the apparatus to measure RPM, simply measure the RPM while the speed is correct. Now, for those of us who DON'T have a laboratory at our disposal, here is my formula to determine required RPM. All measurements must be in decimal values for the required math; thus a caliper and micrometer are helpful. 1. Determine capstan diameter. The capstan is the vertical steel post to the right of the playback head. It will be either .25 (large) or .18 (small). Multiply this value by 3.14 to arrive at your CAPSTAN CIRCUMFERENCE. Note that a cassette capstan will be much smaller than above. 2. Divide 3.75 (or 1.875 for cassette) by CAPSTAN CIRCUMFERENCE, then multiply that result by 60. This will be your CAPSTAN RPM. 3. Divide FLYWHEEL DIAMETER by MOTOR PULLEY DIAMETER. Call this result X. 4. Multiply CAPSTAN RPM by X. This is your REQUIRED MOTOR RPM. In most cases, you should arrive at something very close to 2000, 2460 or 3000 RPM. The vast majority of 8 track motors operate at 2000 RPM, but not all. Keep in mind that actual RPM will usually be 30-40 RPM lower once motor is installed and loaded down by the drive mechanism. In most cases, RPM is correct "as is", but it is possible that internal adjustment of the centrifugal switch will be necessary to get the speed 100% exact. MOTORS INCLUDE FREE E-MAIL TECH SUPPORT. No refunds on motors - exchange only. Limit 1 per customer. Internal speed adjustment is delicate and at your own risk. Please note that NONE of these motors will have the required torque to work in the classic Delco 2-knob and 4-knob car 8 track units. The armature in Delco motors is roughly twice the size of a typical 12 volt armature; thus these motors have tremendous torque to drive the huge, heavy flywheel. Additionally, these motors contain an internal pulse generator. To date, I have not found a suitable replacement for the motors used in Delco automotive 8 track machines - they must be rebuilt. |
| Brand new motors from Barry's 8 Track Repair: |
| Note: All RPM ratings were derived from ACTUAL MEASUREMENT - not from trusting the specifications ! We can also CUSTOMIZE most motors, adjusting them to your exact RPM requirements - add $25 to price. Since I don't have your machine in front of me, be sure to specify NO LOAD RPM. Most mechanisms slow down an average motor by about 30 RPM, which is not noticeable to the average human ear. Speed can also be tweaked by experimenting with belt tension, pulley diameter, tape retention force, etc. To determine direction of rotation, look at motor with shaft facing you. |
| 8TMOT - 1 2000 RPM CW or CCW rotation with internal pulse generator Diameter 1.75" Length 1.95" 12V, 50 mA Matshushita part # MYF-15AF3 27.95 |
| 8TMOT - 2 2460 RPM CCW rotation with Fast Forward Diameter 1.62" Length 1.80" 12V, 100 mA Unknown manufacturer, part # 440417N 29.95 |
| 8 Track Motors |
| 8TMOT - 3 2400 RPM CCW rotation Diameter 1.59 Length 1.48 12V, 100 mA Audiovox type M4 for home and car units, part # 279-04 29.95 |
| 8TMOT - 4 2000 RPM CCW rotation with Fast Forward Diameter 1.80 Length 1.60 12V, 80 mA With pulley, direct drop-in for some Magnavox and others 24.95 |
| 8TMOT - 5 3000 RPM CW rotation Diameter 1.82 Length 1.90 12V, 50 mA with grooved pulley 14.95 |
| 8TMOT - 6 2000 RPM CW rotation with Fast Forward Nippon part # NAM - 3A Direct replacement for some Lloyd's, Realistic and other models. 54.95 |
| 8TMOT - 7 2400 RPM CW rotation Diameter 1.625 Length 1.50 12V, 80 mA Mitsumi M40A2-2S 34.95 |
| How 'bout the WHOLE DARN THANG ??? |
| Brand new (NOS) 8 Track Tape Transport Assemblies Includes motor 8TMOT-7 with belt, pulley, playback head, track change cam, track change sensor, tape-in leaf switch and tape spring retention device. Does NOT include the very common track change solenoid/swing arm assembly, and was the core around which many cheaper manufacturers built their own designs. Mechanism as a whole operates properly with 12 volts applied to the motor and the playback signal fed to a stereo amplifier, and with correct speed. I thought this was a pretty cool find ! I've seen this mechanism in a number of non-audiophile 8 track machines; it is in fact probably the most common mechanism I've seen. A new belt will be installed in this mechanism before shipping. The "missing" track change solenoid/swing arm assembly can be salvaged from hundreds of popular junk machines to make a custom-designed, fully functioning unit with the addition of a housing and a stereo amplifier - or you can simply get a lot of good, new parts to fix up some old machines as a hobby. 79.95 New playback head and mount assembly only - 29.95 Half-inch diameter press-on plastic pulley only - 19.95 (sorry, they are rare) |
| Cassette Motors |
| CASMOT - 1 Some weird dual motor assembly, no idea whatsoever; My guess is that you'll know if this is the one you need! With 2 pulleys. Manufactured by Yale, part # F54R02 19.95 |
| CASMOT - 2 3360 RPM @ 6 volts, 7000 RPM @ 12 volts CW rotation Diameter 1.54" Length 1.45" with pulley Unknown manufacturer part # 46.10.26 14.95 |
| CASMOT - 3 Canon part # MD39-R5CN-F 12 volts, with pulley Too lazy to measure RPM today, please ask! 14.95 |
| Tips for perfect speed tweaking - non technician version |
| Getting an 8 track machine to run at the exact correct speed has plagued mankind since before glaciers covered the continents. The massive meteor that drove the dinosaurs to extinction eons ago was actually gently guided towards the Earth by the uncomfortable strains of a slow-running 8 track machine located in the distant galaxy of SIGMA-X3-21. I can't go back and change the past, but I can ensure a safe future. Being a professional technician with an obsession for reliability (thus my LIFETIME WARRANTY), I always go for the proper, at-the-root solution - take the motor apart, adjust the speed, put it back together, reinstall it in the unit, check the speed, take it back apart, etc. However, this technique requires many years of experience with electronics and fine mechanisms, a musician's great ear, and sometimes tons of patience. I would never dream of forcing YOU to go to such extremes, when there are easier, less hassle-ridden ways. Here are some handy tips I've picked up here and there, or at least imagined in my mind based on physics: 1. First, look for a speed adjustment ! Some better units with onboard speed adjustments are Pioneer, Wollensak, and some of the classic Delco 8 track machines. They're usually not labeled, but are almost always the control closest to the motor. It never hurts to "adjust and return" an internal control; in fact, it cleans them and eliminates noise from an old, oxidized internal connection. 2. A tighter belt will slow down the motor, but place more wear on the motor and capstan bearings. Cheaper manufacturers generally used a specific belt tension to set the speed. 3. A larger diameter motor pulley will speed the machine up. Wrapping layers of tape around a pulley can increase its diameter in tiny increments. 4. A larger diameter flywheel will slow the machine down. Tape can work here too (I've never done this!) 5. If you have access to a lathe, you can reduce the diameter of a pulley or flywheel. |
| Please DO NOT call to discuss motor needs, as it can get very detailed and require long E-mails anyway. Please use E-MAIL ONLY to inquire about and discuss your needs in regards to a motor. ALL MOTOR PRICES INCLUDE SHIPPING IN THE U.S. |
| | | | | | | | | | | | |
| | | | | | | | | | | | |
| | | | | | | | | | | | |
| BARRY'S 8 TRACK REPAIR |
| 4783 N. Glenrosa Circle Prescott Valley, AZ 86314 |
| 21 in stock |
| BARRY'S 8 TRACK REPAIR has more NEW motors for 8 track players than any other shop in the world ! |
| 15 in stock |
| 42 in stock |
| 214 in stock |
| 11 in stock |
| 18 in stock |
| 20 in stock |
| 18 in stock |
| Please note that I strongly recommend paying me to replace your motor - I've had a lot more practice ! I cannot say which motor you need based on a model or part number - All I know about them is already listed right here on this page - period ! |
| The world's largest source for 8 TRACK MOTORS |
| 8TMOT - 8 3000 RPM CCW rotation Diameter 1.81 Length 1.80 12V Matsushita Part # MYT-11KF 34.95 |
| 33 in stock |
| 8TMOT - 9 3000 RPM CCW rotation Diameter 1.53 Length 1.96 Matsushita Part # MYT-15MF Has slightly more torque than 8TMOT- 8, otherwise similar 44.95 |
| 92 in stock |
| 8TMOT - 10 xxxx RPM xxx rotation Diameter x.xx Length x.xx Unknown mfr. part # NEXD198 29.95 |
| 10 in stock |
| All 8 track motors have a shaft diameter of 2 mm (standard size) |
| CASMOT - 4 With speed control board. RPM adjustable from 1800 to 2670 at 12V input NOTE: The speed control board will not work with a different motor, as the free-running speed of this motor is around 10,000 RPM. 34.95 |
| CASMOT - 5 2760 RPM CW rotation with 1-wire tachometer output Diameter 1.57" Length 1.69" 19.95 |
| All cassette motors have a shaft diameter of .075 (standard) |
