Yahoo Groups archive

Vintage Synth Repair

Index last updated: 2026-04-28 23:41 UTC

Message

Re: [vintagesynthrepair] Re: Vibrato is Chopping but chorus is fine

2008-05-26 by Alex Parr

Hi,

Thanks for your reply.  I've read about the term.  Can you tell me how  
to do it?  Does it potencialy damage the organ?
On 26-May-08, at 6:42 PM, johnx66uk2003 wrote:

> --- In vintagesynthrepair@yahoogroups.com, "alexparrca"
> <alexparrca@...> wrote:
> >
> > Hi folks,
> >
> > I've had this funny problem with my A-100 that I just can't get
> rid of. When I turn the organ
> > on, as soon as the Leslie warms up, I hear a sound as if low notes
> were stick. Then, I turn
> > the vibrato/chorus selector about 2 full clockwise turns and the
> noise disappear. When I
> > select either Vibrato I, II or III the sound is chopping but if I
> select the Chorus I, II or III it
> > sounds fine. I've rebuilt the Scanner Vibrato twice without luck.
> >
> > Does anyone can help me?
> >
> > Alex
> >
> Hi Alex.
> This is general advice until I can get to my drawings. If the
> scanner has been rebuilt then the problem may be in the vibrato
> switching or the delay line. Are you familiar with the term DENDRITE
> as applied to Hammond organs. It is a whisker growth that is almost
> invisible to the naked eye. It usually builds up between plated
> metal parts and can short out part of the delay line. It can be
> blown away by 18 volts derived from two nine volt batteries. I had
> this problem on my X-66. Google Dendrite in Hammond organ and get
> back to me if you think I can help further.
> Best regards. John.
>
>
>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.