Reverb Mate, Sole Mate , spring reverb

[N_Cook]

Brand new out of the box and the footswitch is broken. Owner wants me to
replace the switch rather than returning to the importers for a replacement.
While in there try and sort out what apparently is an age-old problem with
such external reverb boxes. Set guitar , amp and reverb for clean and then
excess gain when changing to "dirty" ch. He does not use the second footsw
so I'm thinking of using that to switch in a preset over some gain setting
part of the cct - anyone been here before?
Hiding to nothing?
Existing user pots are output level and dwell but not mix.
LED next to that sw already there to indicate the gain state if I alteM

 

[N_Cook]

Reverbamate that should be by Van Amps
Sw marked with logo YIS in a diamond on one side and RoHS on the other - say
no more. Will have to break into this sw to see what this new to me,
presumably generic, RoHS problem is.

 

[N_Cook]

Why not just simplify things immensely and swap the second footswitch, that
is not used, for the broken one.


Gareth.

I'm replacing the used one with a different make as both show 2 to 4 ohms on
some connections. A few ohms variation on a preset of a few k probably would
not matter for a clean/dirty gain switch. There is obviously a duff batch of
these YIS ones, will remove and open up one today

 

[N_Cook]

Probably a generic failing of "X wing" format of footswitch rather than
RoHS. Because of the X format the contact surface to the tipping contact is
a point rather than a line so it punctures through the silver? plating of
the tipping contact, into ther base metal. Then an irregular surface to trap
contamination etc inside the pit . Regular format like standard toggle
sw would have the fixed contacts appearing as a line because orthogonal to
the casing rather than 45 degree set.
By X wing I mean this external appearance
http://t3.gstatic.com/images?q=tbn:OPXHa_CHLpMgiM:
rather than
http://t2.gstatic.com/images?q=tbn:jrpyuMl8iMi8tM:

Who designs these things? probably graphic artists or media consultants
because the X appearance looks good.

 

[N_Cook]

For anyone else coming across these variants - WUT Pat No 168524 proudly
embossed on the side.

 

[N_Cook]

Got back to the over-overdrive problem. Send side of the springline easily
driven into clipping , I will try reducing the gain of the send side amp and
increase the gain of the receive side and add some mechanical/acoustic
decoupling to the tank

 

[N_Cook]

No longer clipping on large signal input. Originally the tank held by 4
large bolts , large enough to hold a 500W transformer, not a 2 ounce reverb
tank. Decoupled with 4 small bolts passing thru 4 of those floppy rubber CD
optical deck vibration decouplers, so no direct metal coupling now between
tank and case. Much the same throughput so hopefully a mod repeatable in
this generic fault area of external reverb boxes.