Schematic is avaiable HERE.
The overkill 470uF power filter cap has been reduced to 100uF and the 10ohm series resistor for the power supply has been replaced with a series polarity protection diode.
Schematic is avaiable HERE.
The overkill 470uF power filter cap has been reduced to 100uF and the 10ohm series resistor for the power supply has been replaced with a series polarity protection diode.
One of my favourites! I made this one without trimmers once but it's great to have this one now. Will be giving it a go asap.
ReplyDeletehttps://www.pedalpcb.com/docs/AppleFritterFuzz.pdf
ReplyDeleteCan you draw a layout for these?
I have a layout for the Candy Apple Fuzz but I doubt that the schematics floating on the web including the PedalPCB one is correct. It doesn't match the gutshots, it doesn't works as it should and by looking at the differential pair germanium transostors and the tone control, something is off.
DeleteYeah I've built the tagboard a few times and it really sounds different and the controls don't match. I didn't compare the schematic with the one from pedalpcb, but I thought theirs could be better because it had a revision. Is your layout on the tagboards forum?
DeleteNo, I haven't uploaded it anywhere since the schematic is buggy, and yes PedalPCBs is buggy too...:-/.
DeleteHowever me and AlexS have discussed this in the past and after some experimitation we got the Nautre pot working as it should.
Still, the Treble pot needs to be figured out. As drawn in the schematic it does basically nothing so that part of the circuit needs further tracing and investigation. My guess is that one of the 22nF caps acts as a treble cut filter as in many of Björnns other designs. But I'm not sure:-S
I don't remember what I did, but the tone control was functional, I don't know if it was the same as the original, but it worked perfectly as LPF. I believe I increased the capacitor. If you can tell me the modifications for the proper performance of Nature, I would appreciate it.
DeleteLets see...R13(10k) in the PedalPCB schematic needs to be upped to 51k and be removed from Ground. It needs to be connected VCC. Suddenly we have a superfuzz octave section. Now the Nature pot can dial in octave up at 12 o clock.
DeleteA side note. It is pretty easy to do the silicon version. A few resistor changes and a couple of 2N1711s for Q3 and Q4. I need to find the folder for the excact resistor values....
And for Candiru Gated Fuzz it is the silicon version but the BAT42s is subbed for 1N4148s.
Yes, I used low gain 2n2369 and they sounded better than germaniums by setting the bias correctly. I had also put a trimpot to control the bias of one of the transistors, but I don't remember exactly. I'll try the octave modification, try the other stuff and let you know. Thank you very much.
Deletehi everyone, can you tell me if the layout is verified
ReplyDeleteof the black '65?
Thank you very much.
Hi everyone - I’ve built this and it sounds great and performs as it should. Only change I made was to use 47k trimmers as I didn’t have enough 50k but I was able to bias smd J201s to 4.5v no problem. I’d tag it verified. Thanks for the layout!
ReplyDeleteThanks for verifying this one. Tagged.
Deletehi,
ReplyDeleteI really love your work!
one note about the overkill 470uF capacitor:
it wasn't an overkill...
I'm sure you know this better than me, but/and
470uF was used because the series resistor was only 10R,
not 47 as usual...
this is why the "usual" 100uF was replaced with 5x that...
the result is the same 33Hz cut off frequency...
whereas changing the 470uF to 100 would mean ca. 150Hz, which is way beyond both 50 and 60Hz, which kills the filtering function
It is also a question whether a diode can be used as a resistor in a low pass filter...
and what resistance it would have...
I remember once googling this up...
but my knowledge is just a beginner's