[sdiy] Seeking Marshall 1987 guitar amp potentiometers (vintage... 1975)

[Jean-Pierre Desrochers]

Good points but,
If I cut a notch this will keep the shaft from running
all its normal travel (maybe around 3-5% removed) which will make
the shaft from 0-95% of the overall signal.
Or worst the pot would go 5-100%..(!!)
The pot I'm seeking has 0-100% signal path 
with the good shaft travel for the frontplate numbers.
I thought using the old pot case (2 notches) with a new carbon
installed.. same problem.
Any sources anybody ?

By the way I contacted http://tubesandmore.com
but looks like the only have CTS one notch pots..
We'll see.



 On Sat 20/08/11 21:22 , synth synthesizerdiy at gmail.com sent:
> Maybe you could just cut a notch in a newer pot if you don't have any  
> luck with a old stock replacement.  Or just try a new one and see if  
> you can hear any difference.  It seems unlikely that a difference  
> would be heard since most pots are + - 20%.  Or you could add a  
> resistor to the pot to make it a bit under 1M if that notch is simply  
> making the pot 900K.
> 
> 
> 
> On Aug 20, 2011, at 7:09 PM, luther rochester wrote:
> 
> > On 8/20/11 6:01 PM, Jean-Pierre Desrochers
> wrote:>>
> >> Hi list,
> >>
> >> I just bought a vintage Marshall model #1987
> guitar amp head>> and found there is one of the inside 1meg
> log pots>> that is damaged. (Vol I channel). This is a
> vintage 1975 amplifier  >> and I can't find any source..
> >> The pot was made by CTS and it has a
> 1/4" plastic shaft>> with a lenght around 3/8".
> >> The shaft travel is specific to this amp
> since>> the pot's back has 2 notches which shorthen
> the overall shaft travel.>> See the picture here:
> >> http://www.arcenson.com/public/Marshall_1meg_pot.JPG
> >>
> >> This means I cannot use a standard CTS pot
> with one notch.>> Is there anybody that would have some in
> hand ?>> I'd need two of them.
> >
> >
> >
> > Have you looked here?
> >
> > http://tubesandmore.com/> -- 
> > ./luther
> >
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>