This service manual covers the Wurlitzer 4100, 4102, and 4150 organs, as well as their letter-suffix variants like the 4100A, 4100BD, etc. These are all compact organs with two 44 note manuals, 13 bass pedals, and vacuum tube tone generators.

Here we talk about what the original document included, and how we converted our master scans into a printable reference PDF.

The purpose of scanning the documents is to preserve important technical info for everyone who plays or restores Wurlitzer organs. Although we can only scan the small documents right now, there’s a lot of information in the large documents. We don’t want that information locked up in a mystery box. To that end, we’ve been cataloging the larger documents.