TS Sounds Great ...But

[petemoore]

Hisses, Gain efkts this directly at high settings.
 I used a 386 OA for a Voltage Divider
 I used a 820k instead of a 510k to bias the base of the input buffer transistor.
 I added a 100uf cap across the rails. Didn't notice anything different with it.
 Ts's are supposed to be high output?
 I used the schematic from GM arts.
 Anyone have any Ideas?
 It actually sounds real good but has hiss at high gain sets and low output...
 For some reason the voltage divider [and things biased off it] are not at half voltage, IIRC it was 9.15v at battery and 4.38-4.45v for pins other than plus and Gnd.

[Oliver]

Hisses, Gain efkts this directly at high settings.
 I used a 386 OA for a Voltage Divider
 I used a 820k instead of a 510k to bias the base of the input buffer transistor.
 I added a 100uf cap across the rails. Didn't notice anything different with it.
 Ts's are supposed to be high output?
 I used the schematic from GM arts.
 Anyone have any Ideas?
 It actually sounds real good but has hiss at high gain sets and low output...
 For some reason the voltage divider [and things biased off it] are not at half voltage, IIRC it was 9.15v at battery and 4.38-4.45v for pins other than plus and Gnd.

Hi,

try a 200p Cap at the Clipping Stage (i hat a Problem with a TS Circuit
usinig a 1Meg Pot for GainControl, producing much Feeeeeeeeeeeep
at high Settings) With the 200PCap everything was done)

Additional i soldered in two 1N914 Diodes in Series and antiparallel
one 1N4004 with a 1N914 in Serie. That produces a more open Sound.

bye
Oliver

[petemoore]

I put a 152 there, .0015uf, and that made a marked difference, Funny [I should have go ask] you mentioned that, still hissing, but plenty of enough high end with the tone knob, I'll try bigger cap in the feedback loop and go with it, the other TS I have I didn't have the noise.
 I piggybacked the input buffer, after signal injecting  past the buffer at the + OA input, the overall level was lower, so I subbed in another transistor, E B and C's connected except collector open on the first one. Still works...\
 This one sounds better than the last one, which has a TL082, socked in there so good I'm very hesitant to try to steal it...I fear alarms would go off left and right if I started taking anything from that pedal...[twwiddlleyy], it works.
 Adding the output buffer raised the output [AFAICT] by a good amount, N/P there now.
 This and some reverb sure is fun to play !!!

[Transmogrifox]

I suspect the hiss may be coming from your 386 voltage divider.  They aren't known for being happy about driving high-impedance loads.

Anyway, put a 4.7k resistor to ground from the 386 output, a 1k in series to your "V/2" junction, and put a 10uF||.1uF cap (|| parallel couple) from that junction to ground.

Another thought:  How are your inputs and outputs laid out?  I have had trouble with parasitic feedback that produces hisses and high-pitched screams.  

And another: Do you have a clean power supply?  Power supply feed-through can be quite irritating.

An extra tip:  I just tried an AD275 (from Analog Devices) in my TS-type circuit and it is amazingly pristine.  I have never heard this thing sound so good before.  I also have an interesting diode--resistor parallel series thing going on in the feedback loop.