mphtower.net

Actually, mphtower.net. I haven’t updated the logo in years.

Simmons SDS9 Major Component Layout

I’ve been working on a number of SDS9s lately, and it can be a real pain trying to find the right IC. So, I’ve made a little map for myself. Hopefully someone else will find it handy! If you download this and open it in Adobe Acrobat or Reader, then you can turn the layers […]

July 31, 2023
Minimoog Sound Charts – Expanded

Below is an updated copy of the Minimoog Sound Charts guide that was provided with the original Minimoog. This is currently a work in progress and will continue to be updated. This expanded edition includes recreations of all the original sound charts (patch guides) in vector format and patches created in the ’70s and ’80s […]

June 10, 2023
Blank Patch Charts

I’m going to slowly start making new blank patch charts for synths without patch memory. I’ve just got one so far, but hopefully it will be useful to someone. Minimoog (Original)This includes both portrait and landscape versions.NOTE: This is setup to make double-sided printing a bit easier. If you print the entire document you will […]

May 30, 2023
Vintage Synth Components

Below are tables containing components used in vintage synthesizers. This list will grow as I identify more items. Connectors: Potentiometers: Other Components:

May 16, 2023
Vintage Synth Hardware, Screws, Nuts, Washers, etc.

As I order parts to replace the hardware on vintage synths, I’ve decided to track what these parts are. Mainly, this is for myself, but hopefully this will be helpful to someone else. You can use the filters to hide rows. For example, entering “minimoog” in the Screws table will show only the screws for […]

March 20, 2023
Kurzweil K250 Screen Replacement

If you have a K250 then you also have (or have had) a dead or dim screen. They’re all that way. But now, thanks to the magic of buying things, you can have a screen that’s visible, even in the dark! Oh frabjous day! Here is the original display in mine versus the new one: […]

March 17, 2023
Removing and Repairing Yamaha Electone Tremolo Units

This guide was made for my E-70, but from what I can tell this is pretty much valid for any Electone using the big spinning foam thing that is similar to a Leslie lower drum. If your tremolo unit is running intermittently or not at all, then this guide is likely to help. Please pardon […]

February 24, 2022
Hammond L-100 Revised Service Manual

I’ve re-created the Hammond L-100 service manual because the scans commonly found online are just terrible. This version has completely re-drawn schematics, searchable text, and some information on modifications.

February 10, 2022
How to Scan Large Schematics

Scanning in these Yamaha FX/FS schematics has been a real chore. But I’ve come up with a pretty solid method that goes relatively quickly and produces nice results. This approach groups all of the processor-intensive steps in the beginning to make it much easier to do the fine-tuning adjustments without waiting on the computer’s processor. […]

February 5, 2022
Yamaha FX Series Sales Literature

My Yamaha FX-3 came with some sales literature so I’m scanning it in while also scanning in the schematics for the FX/FS series. I really like the logo they used on the FX-3 sales lit and wish they had it on the organ itself. The FS-300/500 brochure is pretty big and I couldn’t get a […]

February 2, 2022