silicon fuzz face vero check!..

[deadastronaut]

hi i just converted a silicon ff from schematic to vero...

as yet unverified...what do you guys think...i may change the 8.2k for a 10k pot..for different bias..

here ya go.. q1/q2 can be 2n3904..also.

[slacker]

Looks good to me.
If it was me I'd mount C2 on the board, negative end to f15 positive end to e15, trace cut at e14. Then move the blue wire to your fuzz pot up to d15 and connect the wiper of the fuzz pot to e17.

[deadastronaut]

Looks good to me.
If it was me I'd mount C2 on the board, negative end to f15 positive end to e15, trace cut at e14. Then move the blue wire to your fuzz pot up to d15 and connect the wiper of the fuzz pot to e17.

cheers yeah i forgot about that..and added it afer lol....cut at d 14 then too. if i did your mod?

think i'll put the trim pot on it..would 10k be ideal?

[slacker]

No you don't want a cut at d14, if you did that the fuzz pot wouldn't be connected to Q2. Yeah 10k or 20k would be good for a trim pot.

[deadastronaut]

No you don't want a cut at d14, if you did that the fuzz pot wouldn't be connected to Q2. Yeah 10k or 20k would be good for a trim pot.

cheers...yep i just noticed that .. ....i'll re-do it with the trim etc...

cheers for the advice...

[deadastronaut]

 

[deadastronaut]

 

[Derringer]

don't run a ground to the bias pot's 1st lug. Remember, that pot needs to be set up as a "variable resistor" (which is the way you currently have it wired). You're not going to wire it as a variable voltage divider which is how your typical volume pot is wired.

your fuzz pot isn't wired correctly. right now you have lug three of the pot connected to the base of Q2. Lug 3 should be connected to the emitter of Q2, lug 2 connected to the positive lead of C2 and lug 1 to ground. The negative lead of C2 should also be connected to ground.
You currently have the negative lead of C2 connected to both the emitter of Q2 and therefore the feedback resistor R1.


you're almost there, keep at it.

[deadastronaut]

 

[deadastronaut]

 

[petemoore]

  Vero's a little hard to read compared to schematic.
  It is necessary to verify what constitutes a connection, what is insulated.
  Otherwise, count the number of connections at schematic node #1, count the number of connections shown at node #1 on the layout.
  Repeat these steps for each node in the schematic:
  Number of parts connected at each node.
  The polarity of components oriented to that node.

[deadastronaut]

cheers pete, while you wre typing i think i sorted it...your right though..more methodical

i think this could be it..i looked at the original schematic..as i should've in the first place



or 

[slacker]

 

[deadastronaut]

not quite!...i built it as this anyway...more of a   than a   or even a  

it all works except its not fuzzing much at all..ive changed the q1 q2' over tried 3904's / bc108'..etc..

tried different bias pots...4.7k /10k./ 25k strange coz it 'sounded ok on the breadboard' (now there's a quote ha ha)..and its exactly the same bits!..

hmmm..the pots work though ha ha...will take voltage off q's tomorrow...getting there...slowly..patience..patience... lol..

[deadastronaut]

ARGHHHHHHHHHHHHH.......!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.........................

why is it not fuzzing much...........

after all that......ARGHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

[deadastronaut]

right its not fuzzing much...when i turn the bias back it cleans up..when i turn the bias full it
sound like its just breaking the signal..but not fuzzing..needs more voltage i think..

this is very strange as it is the very components i used on bread board...and they worked fine..

new battery...

here are my strange looking voltages on the q' trying various numbers

q1 1.19v   q2 2.87v...bc109's

q1 1.27v    q2 2.22v   bc108's

q1 1.46v    q2 0.68v  2n3904's

very low indeed...? any suggestions?...any help.arghhhhhhhhhhhhhhh.............

[petemoore]

  Yepp, she can be extra unforgiving, she notices everything.
 RG's wrestled a worker from her grips on many occasions.
 In the court of mother nature, there are no extenuating circumstances.
 The only real way to win is train a debugger.

[deadastronaut]

thanks pete ..very helpfull...... ...lol...

[Renegadrian]

I have made a few FF vero layouts and a tag layout...You can find them in my gallery
http://www.aronnelson.com/gallery/main.php/v/Renegadrian/?g2_page=11

[petemoore]

  I can't tell which is a collector/E or base there.
 But still I don't see two matching voltages anywhere [Q1 C and Q2 B should be connected, Q1 I don't see any that can be a grounded emitter either [0.0v].
 Designating C/B/Emitter makes it possible to read the voltage notes, but the above notes probably work from what I could glean from the numbers anyway.