TS9DX less gain resistor???????

[AC30Dirty]

Hey guys I'm moding up a TS9DX and was wondering where is the resistor that allows the pedal to clean up better when the gain is turned down? I have a feeling it's on one of the smaller oards and not the main board. Can anybody help me out??

[GibsonGM]

How about a bypass capacitor to preserve highs when you turn the gain down?  It go between wiper and hot side of gain pot, I believe (you might have to play with it), and be about 1nF.   I'm sure you can find more info if you search on here for "bypass capacitor"...

[MartyMart]

It's a 51k off the diodes in the FB loop to wiper of the gain pot, should be easy to spot as it's the only 51k in the pedal.
I dont have a "DX" schem, otherwise it would be easier.
Change that to a 20k and the 4k7 off the same "node" where the .047uf is to a 2k2 for the "more/less" mod.
Does'nt the ts9dx have a "hot" mod anyway ? or am I thinking ts7 ....

MM.

[AC30Dirty]

Thanks guys, I found the resistor and swapped it out. However, on the other small board there is a 470K resistor. Do I need to be concerned with this one? Something is telling me NO but, I can't be sure. HELP!?!?!?!

[AC30Dirty]

well, the pedal sounds god so far. I just decided to leave the 470K resistor on one of the small boards I had mentioned earlier alone. Now I have a clipping diode opinion or suggestion if you will. I left the stock diode configuration for the TS9 mode, i put 1X1N4001, 2X1N4001 in series for the HOT mode to get asymetrical clipping and TURBO of course has no diodes but, I was wondering what I could use for the + (PLUS) mode. It has 4 spces for diodes . 2 going one way and 2 going the other. Could I use transistors here like maybe J201's? I would like something different. Any suggestions?

[MartyMart]

You can use mosfets as clippers, I've had 2N7000's working well and IRF520's - but they are BIG !
search mosfet clippers .....
Dano has some on is site as part of a Rat mod
MM

[AC30Dirty]

well.... for the plus mode on my TS9DX i went with LED----->1N4001,
                                                                          1N4148------<LED
Like so.... It's sounds pretty cool. I get a real AC/DC type tone. However, the LED's don't light up when I strike a chord. The LED's must be working because when I switch to that mode the volume jumps up significantly. They just don't light up. Could there be somethig wrong here???

[MartyMart]

Sounds like they are working, did you carefully check orientation ?
They don't always light up, depends what voltage is across them.
Longer lead and smallest internal metal section is "+" side.
MM.