keto wrote:No, that's not right. I build mine and a couple for friends from their layout (which I have to assume is the same as the schematic, didnt check) and they have HUGE output, ie., unity is about a quarter turn up. Check transistor orientation maybe?
orpheumlover wrote:I'm thinking of building a Ge version of this. What would be a good Ge substitution for the 2N3904? Would it be 2N408, NKT318, or 2N2613?
orpheumlover wrote:Thanks for letting me know about the different schematic for the Ge version. But, since this is a Mosrite Fuzzrite thread, and I hate to ask because you guys may flog me because of the consequences, can anyone post the Ge version of the Mosrite Fuzzrite? I know, I know, it's probably availablbe somewhere out there on the web...but, since this is a Mosrite Fuzzrite thread...let's keep all versions together. (Let the floggings begin!)
neoflox wrote:keto wrote:No, that's not right. I build mine and a couple for friends from their layout (which I have to assume is the same as the schematic, didnt check) and they have HUGE output, ie., unity is about a quarter turn up. Check transistor orientation maybe?
Damn. You know that is not the answer I wished to get.
Would someone then be so nice to have a look at this layout? The top one is the classic fuzzrite, (based on the appended schematic) I build recently. The transistors are right the way they are (used 2N3904) so it's got something to do with the layout. Pots are 500k for Depth (attack/fuzz) and 50k for volume. As I said, it is the original raspy sound but only equally loud compared to the clean signal when Volume is max'd. Oh and nevermind the bottom, larger layout. It is my take on the green bomb schematic but it is faulty …
Thanks in advance!
Thaxt wrote:With the Ge Fuzzrite schematic, try setting the initial gain resistor to a lower value - say, 470K - 1M. Then, use a 500K/L pot as a gain pot, between the base & collector of Q2. Putting pots in these positions (as gain resistors) can produce more hum, but, the 22K resistor connected on the output line will take some of this out.
That 10M gain resistor on Q1 yields one ton of gain...I even changed this part downward to a 4.7M, then a 2.2M fixed resistor, but, the whole thing still can hum a lot if/when you start tweaking the output cap values larger - to .022, or even .047 as I've used, & like to do. 1M here seems good for now.
Wire (better still, breadboard) the output cap from the collector of Q1 directly to the base of Q2. Ditch the 350K/250K/500K pot that pans between the 2 outcaps. (You can always vary this change later on for different FX,or return to the original setup) Then, take the output directly from the (.022/.047/ even .0068) outcap off the collector of Q2, & make this a direct output to a 500K pot.
In short, you are no longer panning between 2 outcaps at this point. Everything comes off the Q2 one, to a 500K output pot.
Sometimes, I think the result might require a Noise Gate pedal (or any Noise Gate), but, the resultant sizzlerasp/thickbuzz that happens when you turn the 500K gain pot towards max is worth the ride. Gives some really super-sustained, Fuzzrite timbre sounds. This thing can really hang on for great sustain, & trailoffs. A bit of crackle in there, too, @ max gain. The overtones do get more charactersitic when you reach the latter sweep of this 500K gain pot - the thing gets really think & raspy (for me, anyway) Lower this gain pot - even cutting back on yr Vol control - & you can get a very different timbre, cleaner sounds. A very versatile experimenter's mod. this one.