On Mon, 28 Jan 2019 7:00 pm Christoph Kukulies <kuku@... wrote:
Rick,
the serial number locates the organ into 1968 (+/-), the time, when foam was used already. To be sure whether it has form you may want to look against the rear of the manuals. If you see rivets there, you¡¯ll be safe. If not, ?foam¡°.
Sometimes the is a cold solder junction at the point under the upper manual, where the bundle of resistor wires is soldered to the terminal. You may resolder this spot.
Regarding the muted vibrato: R20 (2.2 M) in the AO-28 vibrato channel often is the culprit. When you are at it also exchange R7 (2.2M in the normal channel).
Can be zinc whiskers in the vibrato rocker switches as well.
¡ª
Christoph
> Am 28.01.2019 um 08:59 schrieb Rick Whatson <greenfox4075@...>:
>
> I have been asked to service a Hammond C-3. s/n 94767. It is connected to a Leslie 815.
>
> A new player of this church organ had made a long detailed list (2x foolscap pages) of "problems".? 99% of what was written were quirks of these types of Hammonds that modern keyboard makers try hard to emulate.
>
> There were a couple of real problems.
> 1/ bottom C pedal not playing properly (fixed, was lever bent not pressing far enough)
> 2/ A3 note on upper manual not playing with either drawbar set A and B.
> 3/ no vibrato function for upper or lower keyboard. When switching vibrato on the volume drops significantly and sounds distorted if swell raised to try to hear it.
>
> How mush is involved in opening up to fix the A3 16' key contact?
>
> Is it possible that someone has disconnected the vibrato?
> What should I be looking for?
> Is this serial number likely to have foam?
> Anything else I should be looking for?
>
> It was quite clean. I cleaned it more and oiled it.
>
> Thank you
> Rick Whatson.
>
