Vintage Synth Repair

--- Kate <bobmannn@...> wrote:

> I could use some suggestions to repair my Wurlitzer
> Model 4373. I 
> inherited it from my Uncle recently. It appears that
> it had not been 
> played in quite a while, as a lot of the keys made
> no sound and there 
> was a lot of static in the switches. I cleaned all
> the contacts which 
> restored all the keys and eliminated the static, but
> the pedals do not 
> work right.
> Going UP the scale, I press the pedals:
>    C D E F G A B C
> The sounds, however, come out
>    C D E E G G B C
> When I play the pedals DOWN scale, neither the E nor
> the G play any 
> sound...I must go back up the scale to get the sound
> (albeit the wrong 
> notes)
> I cleaned the contacts, made sure there were no
> obvious shorts or 
> crushed wiring, but no luck.
> Anyone have any suggestions?
> Thanks for reading this far...
> Bob
> 
> 

If I remember correctly (it has been a while) that
model Wurlitzer used a key contact that had both a
normally closed part and a normally open part. I used
to clean them with a rather thin rubber tool made by
cutting a strip from a big eraser. The silver plated
bronze contacts get corrosion. There are two wire
contacts with a flexible spring contact between them.

The MITA website indicates the following on service
manuals and parts for Wurlitzer (who have been out of
business for some time:
Morelock's Organ Parts (Parts and Service for all US
built  Wurlitzer Organs and Electronic Pianos)
Mark Morelock
37-A Main Street
Rienzi, MS 38865
662-462-7611 - Phone
662-462-7611 - Fax
morelocksorgan@... 
Wurlitzer Service Manuals Website:
www.MitaTechs.com/morelock1.html 


When I was in the trade, I dealt with Mark and his
wife, very nice people. I don't know how much of the
stuff is still available.

Jim Cason
Promised LAN Computing, Inc.
former organ/keyboard/amp technician.