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Doctor Bass Inc.

4169 Verdugo Road
Los Angeles, CA 90065
323-274-4319 or 323-834-TUBE

Silly times for silly people

Doctor Bass Inc.

  • MAIN
  • Blog
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  • About
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Tape Machines

Repair, modification, and restoration of professional analog tape machines of all shapes and sizes.

Tape Machines

Repair, modification, and restoration of professional analog tape machines of all shapes and sizes.

Ampex 300/351

Ampex 300/351

We performed a full restoration akin to a classic automobile on this machine.  An original from about 1960 - as installed in Capitol Studios NYC.  See before photos at the bottom of the series.  She was a mess!

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Ampex 440B - 3M M79 16track

Ampex 440B - 3M M79 16track

Both serviced and recorded on by the Doctor!

3M M79 audio card

3M M79 audio card

This one is almost original.  Notice the TLE207 opamps - not factory - someone before us installed these without proper compensation.  

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ATR 102 1/2" 2 track

ATR 102 1/2" 2 track

Replacement of the capstan upper assembly w/tach wheel.  Commonly needed on older machines with failing rubber.

MCI JH110C-4track 1/2"

MCI JH110C-4track 1/2"

I love these machines.  We service several in town.  They can run very reliably with some basic service to the power supplies and connectors.

Nagra IV-S

Nagra IV-S

I did a multi-day location recording with this unit on a train!  Incredible sound from a small battery operated package.  I did have to service a connector that was cutting out - very annoying in a live situation.

Ampex 440C - 1" 8 track

Ampex 440C - 1" 8 track

This machine was a mess.  The client purchased it sight unseen (bad idea), and had another tech working on it for months.  When I was called in it would not record without massive bias noise, the lifters weren't engaging properly, and the heads needed grounding of the cores.  In a couple of weeks, the machine was recording beautifully and operating like it should.

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Ampex ATR-102 1" 2 track

Ampex ATR-102 1" 2 track

This ATR services modified Ampex is a thing of beauty.  Only a handful were ever made, and I've been lucky enough to service and mix to this machine.  Currently available for selective rentals in the LA area - mixers and mastering engineers may inquire with me via email.

Scully 280 1" 8 track

Scully 280 1" 8 track

I thought this machine had never been used the first time I saw it.  Cosmetically that's a great thing, but operationally - you never know!  Tape machines are a bit like cars, they need to be driven and serviced regularly.  This machine worked OK some of the time - and really needed a new pinch roller.  We ended up replacing all of the record relays to get her back to solid.

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