Analog Synthesizer Service & Modification
PROPHET 5 SPECIALIST
For the Rev 2:
Upgrade the EPROMS & power supply-- transfer the operating system to 2716 EPROMS, eliminating the need for -5 and +12 supplies. Improved heatsinking of regulators. This results in a more reliable power supply with less chance of lockup.
$60 parts and labor.
RAM Replacement for Rev 2 & Rev 3.0 -- the Rev 2 & 3.0 use eight 6508 RAM ICs for patch memory. These are increasingly hard to find, and expensive ($15 each). This new board replaces the 6508s with two 6514s. On the 3.0, it's plug and play; Rev 2 installation requires one cut and one jumper on the CPU board.
Cassette Interface -- upgrades the operating system & adds IN and OUT jacks for loading & saving programs.
$75 parts and labor
For the Rev 3:
Rev 3.0 -- Upgrade the EPROMS & power supply-- transfer the operating system to 2716 EPROMS, eliminating the need for -5 and +12 supplies. Improved heatsinking of regulators. This results in a more reliable power supply with less chance of lockup.
$60 parts and labor.
Memory Upgrade for 3.2-- upgrade to version 3.3, which adds memory for two more 40-program banks (120 programs total)
$75 parts and labor.
MIDI Interface for revs 3.2 and 3.3-- The original Sequential Circuits board, with simplified mounting. Send & receive in Poly or Omni mode on your choice of 16 channels; program change; pitch wheel receive; sysex load & save of patch data.
$175 parts and labor.
MIDI Firmware Upgrade for P5 rev 3.3
New features include activity monitor, tuning progress display, unison modes & unison detune, sysex save of one or all 120 patches now compatible with standard MIDI patch librarians, and more. Details at http://www.tauntek.com/V10pt6instrs.pdf
MIDI Firmware Upgrade for Prophet 10
Makes sysex patch saving compatible with standard patch librarians, eliminating need for the unreliable onboard cassette unit.
Transformer Replacement-- for any revision.
Older transformers can have an annoying hum; they can be replaced with a new torroidal hum-free transformer.
$100 parts and labor.
Keyboard bushing replacement
For any j-wire keyboard; improved key feel & quieter action.
$75 parts and labor for 61 note keyboard.
$50 parts and labor for 37 note keyboard.
Detatchable Power Cord
Add standard 3-conductor socket & 8 foot cord to older synths like the Pro-One, P5 rev 2, etc.
I also install Kenton, Encore and Synhouse MIDI kits. Average cost of installation is $80 to 100, depending on the time required and complexity of the install. Contact me for details.