Ibanez TS9-DX circuit

I know the TS vers are common , but the DX which switches
different combos of diodes , caps & resisters doesn't seem to be
around and that is the part i'd like to see .
Do they simply switch the whole feedback network ? just connecting
the networks one at time while leaving them all connected on one side ?

From Dai Hirokawa:

"TS9"(Normal) mode(for comparison): .047uF mylar w/two small 1N914/1N4148 Si diodes.

"+" mode: 0.22uF polarized electrolytic w/four small signal Si diodes--two for the top of the waveform,
two for bottom (these look like 1N914/1N4148)

"Hot" mode: 1uF polarized electrolytic w/pair of LEDs(w/a 470k in parallel w/the LEDs)

"Turbo" mode: 2.2uF polarized electrolytic w/no diodes(seemed odd but it does look open)
-the 4.7k and 51k are unchanged for all modes

So it looks like it's switching caps and the diode configuration. ( the 47n cap of the FB loop at the 51k )
The "Hot" and "Turbo" modes sound awful IMO - WAY too much low end "mud" going on !!

Marty.

I've heard an anologman modded one that sounded decent i thought ,
but certainly makes the normal ts sound small . depends how you look at
it and what you're used to but it does seem one way or the other

Really just want to know how they do the switching ,

tia , regards Greg

Except for that one , being that i don't have a real job
[ & health benefits ]
i need glasses , what a drag it is getting old . So i'll have to trace it but
was hoping to save myself the strain .

btw need someone who can deal with blueprint size schematic
[ trident discrete channel ] if it hasn't already faded . I would like to give
up " keeper of the schematics job , but man too many years invested in
gathering [ not a hunter just a gatherer ] Damn all started with the pultec

Greg, I don't have a "DX" schem, but as its switching just the diodes and
the 47n cap that connects to them, can't be too fiddly right ?
MM.

I was thinking it was the whole network , that the 4 feedback paths
are all connected on one side and a switch to select which loop to close ?

I should just breadboard one but it's a deversion form getting the more
serious things done , thanks for the thoughts

And other than tracing not being a HUGE task , there is the challenge
of why something simple doesn't exist ?

Surprising there doesn't seem to be any 'asym stuff' going on amongst all those modes (like the overpriced Boutique-screamers do: some Ge & Si & combination or was it '4148 & '4001, should look that up)

[quote author="clintrubber"]Surprising there doesn't seem to be any 'asym stuff' going on amongst all those modes (like the overpriced Boutique-screamers do: some Ge & Si & combination or was it '4148 & '4001, should look that up)[/quote]

Yes, a 1N4148/1N4001 combo is very cool, I like assym in this stuff much
more than symetrical.

Or that the turbo version with no diodes sounds o.k. , despite the
heavier bass

4001 , wouldn't have thought of using a power diode , i'll try it
but do intend on using a germainium in with the 4148 for the asym feel ,

guess i'll work one up with more than 4 mode switch , just to remind
me which ones don't work , hah

there's also a few people using germ xisiters as diodes [ i believe ]

Greg, using germainiums gets you into the OD855 area, though that is a slightly different circuit.
You'll have more "crunch" earlier in the gain pot but less volume from that.
I've done many TS mods, and sold quite a few too, other good things to do
are :
Change the 47n off the - input ( as mentioned above ) to a 100n ( less mids)
1N4148/1N4001/4002 as diode combo
The 220n tantalum to ground off pin 1 of the IC down to 82n just opens up
the top end a bit, quite nice with tone pot adjustments.
Dropping the 4k7 off - input to 2k2 for a bit more gain.

MM.

the ones i like so far are
swapping the 1 ufs for non polar film types
increasing the feedback cap for more lows
addition diode for assym [ in princple at the very least ]

haven't tried the carbon resisters on the output , or the tones
cap mods .
I did make a fulltone II with the extra boost pot , it was o.k.
be curious to see what is in an OCD .

Thanks for the experience tips

In the overkill-department (the overkill-GSSL-sidechain filters were small boys in comparison), I saw a schematic on IIRIC a German DIY-site that had switches to make about every diode-configuration, Ge, Si, power-Si, also in different numbers, and perhaps even BJTs & FETs configured as diodes as well. Only hollow state was missing.

Life must be hard when you can't make choices and then just add about everything you can think of in fear of missing something :wink: :twisted: :green:

My FD-clone (a.k.a. TS9-clone-clone) has the boost pot as well, nice addition. I went for one diode-config, the 4001+something IIRIC, but on the other hand I have a few switchable caps for bass & treble :wink: