Fixing volume drop on v1 Small Stone (locating those resistors)

[jolly]

I have the first version of the Small Stone that was made somewhere between 1974-1978 it is the 6 chip and it doesn't have the "r6 or r47" labels it just has the value labels " 100k, 1k8".  i cant seem to find the two resistors to do the volume drop mod. can some one help me locate these? i unfortunately don't know how to read schematics but there is a picture of my board here "i don't know how to upload an image" http://www.pedalarea.com/images/ss_us_v1_board.jpg if some one could circle the ones i need to change it would be great.

[jolly]

Sweet!!!!!! I figured it out. now can someone show me the two resistors i need to change for the volume drop mod?

[jolly]

"To fix the volume loss problem - The feedback resistor in the input gain stage is R6, 5k6 - change to 10k The mixing resistor in the feedback / color stage is R27, 2k2 - change to 5k6" this is the mod off the GGG site. My problem is i don't know where R6 or R27 is, the pic above is the same board thats in mine. can some one tell me where those resistors are located at on the board ive got a schamatic but its not for the version1  6 chip design with 2 transistors  (the 6th chip is under the large cap).

[jolly]

so...nobody knows? is there a layout of this board anywhere?

[jolly]

bump

[jolly]

bump
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Cry

[theehman]

With 4 EH Small Stone schematics in my collection I was unable to find a 5.6K or 2.2K resistor shown anywhere.  However, this is the volume mod as described by R.G. Keen:

From R.G. Keen

The loss of volume when engaged is correctable in the Issue J Small Stone
by changing the gain of the two-transistor preamp at the input of the circuit.

There are two 4.7K resistors at the emitters of the input transistors. One
(R7) goes to ground from the emitter of Q1, the second (R42) connects the
emitter of Q2 to the emitter of Q1.  Those two resistors set the feedback gain
of the two-transistor compound.

Increase the 4.7K between the emitters (R42) to increase the gain. Start with
10K.  Be aware that this will affect the stage biasing, so the headroom may
be affected; I don't think this will really be a problem.

The silly thing *ought* to have included a JFET buffer in front of it for
buffered bypass and a bit of gain in the first place.

-------------------------------------------------------------------------

Dave Matelitz reported successfully fixing this problem by making these
part substitutions:

Changing R42 from a 4k7 resistor to a 10k resistor
Changing R11 from a 3k3 resistor to a 10k resistor

Tweak these two resistors until you get the volume right with no oscillation
in the signal.

The schematic you posted is for a much later version of the Small Stone.  It has the resistors mentioned by R.G, but your unit doesn't have them.  As far as I know, no one has put together a volume mod for this particular nit yet.

[jolly]

damm that was what i was afraid of.well i guess a booster will have to do the job.