The Mellotron Group

With Mellotrons, as with Harley Davidsons, start with the simplest  
possibility and work your way up. Most of the problems are resolved at 'simple."  
Glad you found and fixed it.
 
Frank
 
 
In a message dated 2/25/2012 7:34:31 P.M. Eastern Standard Time,  
tron400@yahoo.com writes:

 
 
 
Looks like it was one of the spring hooks that holds the head block in  
place. One of them was not in its hole.

Bernie

--- In _newmellotrongroup@yahoogroups.com_ 
(mailto:newmellotrongroup@yahoogroups.com) ,  "tron400" <tron400@...> wrote:
>
> Wouldn't you know, it's  not acting up at the moment. I'll have to leave 
it running for a  while.
> 
> Jerry put a new cable in when he refurbished it. The  old one had the 
screeching cable rot.
> 
> BTW, anyone have an  empty frame laying around?
> 
> Bernie
> 
> --- In _newmellotrongroup@yahoogroups.com_ 
(mailto:newmellotrongroup@yahoogroups.com) ,  lsf5275@ wrote:
> >
> > Good call Bruce... I didn't see your  post or I wouldn't have repeated 
the 
> > information.
> >  
> > Frank
> > 
> > 
> > In a message  dated 2/25/2012 1:30:16 A.M. Eastern Standard Time, 
> > pocotron@  writes:
> > 
> > 
> > 
> > 
> >  
> > Hey Bernie-
> > The headblock must remain electrically  isolated from the chassis to 
> > avoid this.
> > Last time  this happened to me I had a missing headblock roller 
(previous 
> >  owner's fault, which I fixed). Therefore, the headblock was rubbing 
the  
> > chassis, which changed the hum when different tracks were  selected. A 
bad 
> > cable can also cause this problem, but it is  usually screechy(not good 
for 
> > tapes). Check the w-clips that  hold down the headblock, their 
centering 
> > washers may be off-set  or worn through, and may be causing the short. 
You may 
> > have to  remove the headblock to fix this one.
> > The track selector  mechanism can also cause this short. However, if 
> > this is the  machine that Jerry Korb refurbished, he probably already 
fixed 
> >  this.
> > 
> > Hope this helps, best of luck. More  sugar!
> > 
> > -Bruce Daily
> > 
> >  
> > 
> > 
> > 
> > 
> > 
>  > From: john barrick <barrickjohn262@>
> > To: _newmellotrongroup@yahoogroups.com_ 
(mailto:newmellotrongroup@yahoogroups.com)   
> > Sent: Friday, February 24, 2012 1:55 PM
> > Subject:  Re: [newmellotrongroup] Grounding Issue?
> > 
> > 
>  > 
> > 
> > 
> > Try putting it in the C  position and then wiggle the cable a bit while 
> > playing a note.  That may reproduce it.
> > 
> > On Fri, Feb 24, 2012 at 2:53  PM, john barrick <_barrickjohn262@_ 
> > (mailto:barrickjohn262@)  > wrote:
> > 
> > Maybe the cable going from the head  block to the preamp? 
> > 
> > 
> > 
> >  On Fri, Feb 24, 2012 at 2:45 PM, tron400 <_tron400@_ 
> >  (mailto:tron400@) > wrote:
> > 
> > 
> >  
> > 
> > 
> > #500 has had an intermittant hum for  a while now. I thought that maybe 
it 
> > was related to the volume  pedal jack, but I noticed yesterday that the 
> > volume of the hum  changes when I move the track selector. Track C 
doesn't seem 
> > to  have any hum, but Tracks A and B do. Any idea what the cause might 
be?
>  > 
> > Bernie
> > - 
> > 
> > 
>  > 
> > 
> > 
> > 
> > 
> >  
> > 
> > 
> > john barrick
> > 
>  > 
> > *Leo got it right the first time*
> > *then he  added a second pickup and got it righter*
>  >
>