ts9 landgraff switch de-bugging help

[czech-one-2]

hi,im only posting this cause i am truly stumped!
i have a reissue ts9 in which i removed the diodes and in thier place added a dp3t on/off/on swith to switch between stock diodes,clean boost and three 1n34a's.
clean boost and 1n34 selection is perfect,however the stock two diode setting sounds crackly and the sustain decays in a strange,crackly way. i have tried 4 switches,and numerouse diodes to make sure these components were ok. i replaced the 51pf cap thinking it wasnt making a good connection. different op-amps too.
why would 2 of the three switch positions work,while the 3rd with two stock symetrical diodes sound crackly??
i even tried a dp3t on/on switch,one side was fine,the other had that crackly decay.
ive installed this configuration in several ts9's so i know it works. ive checked all my solder connections for any bad joints.
i dont have a multi meter so i cant post any readings. so i'm hoping somebody here has experienced a similar phenominum .
any ideas what could be going on here? 
thanks in advance for your time!     bk

[czech-one-2]

oh, i wired up the on/on switch according to the diagram in the post on this page ''dp3t wiring diagram''
and the on/off/on switch like this-

x                  x                      x
1  2  3      1  2  3         1  2  3
|                   |                      |
4  5  6      4  5  6         4  5  6

the diodes are across poles 1/4  and  3/6   with wires from 2/5 to the board diode location. 
ive tried switching the wires around but that should make no difference.

[MikeH]

Diode orientation?  Or maybe a damaged diode?

[czech-one-2]

diode orientation, one + faceing one way the other + faceing the other way accross lugs 1/4 of the switch.
and in trying 4 switches,i used new diodes as well. how on earth could two of the 3 positions be working?

[afrogoose]

Is it possible you are seeing the switch backwards/upside-down?  You might be actually hearing the 1n34a's instead of the Si diodes.  The three Ge diodes are gonna sound pretty farty in a TS, FWIW.

[czech-one-2]

afrogoose,you are correct!
the 1n34's sound terrible in this cirquit.symmetrical or assymetrical made no difference.farty tone.
assymetrical 3mm red leds was all it needed for a nice crunchy distortion.
i feel like the moron who forgot to install the opamp or check the battery!
[wait,i've done that]